Abstract

This disclosure provides an energy storage apparatus, an energy storage apparatus control method, and a photovoltaic system. The energy storage apparatus includes: a plurality of battery clusters, a plurality of conversion units, a start unit, and a controller. The controller includes a plurality of control units. The start unit is configured to: after receiving a start signal, control a control switch in at least one battery cluster to close, to start a control unit corresponding to the battery cluster. The control unit is configured to: determine, based on a state of the control switch in the battery cluster, whether a black start mode is on; and when determining that the black start mode is on, control a DC-DC converter in the corresponding conversion unit to release electric energy stored in a battery pack in the corresponding battery cluster, to energize a direct current bus.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02J 7/35 - Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells

Abstract

Embodiments of this application provide a heating control method and apparatus, an oil pump, and a heat exchange system. The method includes: in a cold state, injecting a heating current into an oil pump motor, where when the oil pump motor is not started, a torque that the heating current is capable of generating is zero, and after the oil pump motor is started, heating power of the heating current is greater than heating power of an energy-saving current, where the energy-saving current is a current capable of enabling a first motor to reach a target operating condition when oil temperature is greater than a preset temperature threshold.

IPC Classes  ?

• F04D 29/58 - Cooling; Heating; Diminishing heat transfer
• F04D 13/06 - Units comprising pumps and their driving means the pump being electrically driven
• H02P 21/18 - Estimation of position or speed
• H02P 21/22 - Current control, e.g. using a current control loop
• H02P 21/34 - Arrangements for starting

Abstract

A charging module and a charging device. The charging module includes a three-phase rectifier module, a bus capacitor module, an inductor, and a controller. An input end of the three-phase rectifier module is electrically connected to an input power supply, and an output end of the three-phase rectifier module is electrically connected to an input end of the bus capacitor module. The bus capacitor module includes a first bus capacitor and a second bus capacitor. The first bus capacitor is connected between a first output end of a three-phase bridge arm and a midpoint of the three-phase bridge arm, and the second bus capacitor is electrically connected between a second output end of the three-phase bridge arm and the midpoint. The inductor is electrically connected to the midpoint of the three-phase bridge arm and a midpoint between the first bus capacitor and the second bus capacitor.

IPC Classes  ?

• H02M 7/217 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• H02M 7/04 - Conversion of ac power input into dc power output without possibility of reversal by static converters
• H02M 7/219 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration

Abstract

An electronic assembly includes a circuit board assembly and a liquid cold plate. The circuit board assembly includes a board, a first heat-generating component, and a second heat-generating component, where the first heat-generating component and the second heat-generating component are disposed on the board. The liquid cold plate includes a liquid inlet and a liquid outlet. The liquid cold plate includes a first cooling region and a second cooling region, where the second cooling region is closer to the liquid outlet than the first cooling region. A heat dissipation capability of the first cooling region is stronger than that of the second cooling region. A heat-generating density of the first heat-generating component is greater than that of the second heat-generating component, the first heat-generating component is thermally connected to the first cooling region, and the second heat-generating component is thermally connected to the second cooling region.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H05K 1/02 - Printed circuits - Details

Abstract

A resonant converter, a control method of a resonant converter, and a related device. The resonant converter includes a control circuit, a drive circuit, and a switch circuit. The control circuit is configured to generate, based on a target output electrical parameter of the resonant converter, a first pulse signal and a second pulse signal that have different frequencies. The control circuit is further configured to: obtain a first drive signal based on the first pulse signal and the second pulse signal and send the first drive signal to the drive circuit. The drive circuit is configured to: convert the first drive signal into one or more second drive signals and send the one or more second drive signals to the switch circuit, to turn on or off a switch component in the switch circuit.

IPC Classes  ?

• H02M 3/00 - Conversion of dc power input into dc power output
• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
• H02M 3/156 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
• H02M 3/338 - Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
• H02M 7/217 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A power distribution circuit of an uninterruptible power supply is provided, where a first port of the power distribution circuit of the uninterruptible power supply is electrically connected to a second port. A third port is electrically connected to the second port by using a compensation circuit. When an input voltage of the first port is less than a rated voltage of a load of the second port, an input voltage of the third port is input to the compensation circuit. The compensation circuit converts a direct current into an alternating current, so that the alternating current output by the compensation circuit and the input voltage of the first port jointly supply power to the load of the second port.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
• H02M 3/335 - Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

Provided in the present application are a power conversion system and a ripple current suppression method therefor. The power conversion system comprises a controller, M direct-current converter units, a bus capacitor and an inverter unit. An input end of each direct-current converter unit amongst the M direct-current converter units is connected to a direct-current power supply; output ends of the M direct-current converter units are connected in parallel and then connected to an input end of the inverter unit; the bus capacitor is connected to the input end of the inverter unit in parallel; an output end of the inverter unit is used for connecting to a power grid or a load. When the ripple current amplitude of the bus capacitor is greater than a first threshold, the controller is used for controlling N direct-current converter units amongst the M direct-current converter units to regulate the output current/input current, thus reducing the ripple current amplitude of the bus capacitor, M being greater than or equal to 2, and N being a positive integer less than M. When the output power of the power conversion system is not obviously reduced, the present application can improve the suppression effect on the ripple current of the bus capacitor, thus improving the long-term reliability of the power conversion system.

IPC Classes  ?

• H02M 7/42 - Conversion of dc power input into ac power output without possibility of reversal
• H02M 3/00 - Conversion of dc power input into dc power output
• H02J 3/01 - Arrangements for reducing harmonics or ripples
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

A refrigeration system, comprising a condensation heat exchanger, a switch valve, an evaporation heat exchanger, an adsorption bed and a compressor, wherein the condensation heat exchanger, the switch valve and the evaporation heat exchanger are sequentially connected by means of a pipeline; the adsorption bed and the compressor are both connected between the condensation heat exchanger and the evaporation heat exchanger; and in a circulation loop formed by the adsorption bed, the condensation heat exchanger, the switch valve and the evaporation heat exchanger, when the adsorption bed cannot generate a gaseous working medium, the compressor can work. The refrigeration system can achieve working medium circulation by means of the circulation loop formed by the compressor, the condensation heat exchanger, the switch valve and the evaporation heat exchanger, such that the evaporation heat exchanger can uninterruptedly reduce the temperature of heating components.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

The present disclosure relates to dynamic high temperature operating lifetime (DHTOL) testing of a transistor device under test, DUT (210), for example, a GaN power device. The disclosure presents a test system (200) for performing the DHTOL test on the transistor DUT (210). The test system (200) uses a DHTOL switching cell (220) and a lock-in circuit (240), which are both controlled by a controller (230). The controller (230) is configured to measure an on-state source¬ drain voltage and an on-state source-drain current of the transistor DUT (210) during its operation according to a switching signal applied by the switching cell (220). The controller (230) is also configured to control thresholds of comparators of two comparator pairs (241,242) of the lock-in-circuit (240), in order to track changes of the on-state source-drain voltage and the on-state source-drain current of the transistor DUT (210) over one or more repetitions of the switching signal.

IPC Classes  ?

• G01R 31/26 - Testing of individual semiconductor devices

Abstract

The disclosure relates to a power MOSFET device (10) having a source terminal, a drain terminal and a gate terminal. The power MOSFET device comprises a drain contact (105) formed at a bottom side (11) of the MOSFET device; a first electrode (103); a second electrode (102a) and a third electrode (102b). The drain contact (105) is electrically connected to the drain terminal. The first electrode (103) is formed at a top side (12) of the MOSFET device (10), which top side (12) is opposing the bottom side (11). The first electrode (103) is electrically connected to the gate terminal. The second electrode (102a) is formed at the top side (12) of the MOSFET device (10). The second electrode (102a) is spaced apart (127) from the first electrode (103) and is electrically connected to the source terminal. The third electrode (102b) is formed between the first electrode (103) and the drain contact (105). The third electrode (102b) is spaced apart (123) from the first electrode (103) and is electrically connected to the source terminal. The third electrode (102b) is configured to reduce a capacitive coupling of the first electrode (103) to the drain contact (105).

IPC Classes  ?

• H01L 29/40 - Electrodes
• H01L 29/41 - Electrodes characterised by their shape, relative sizes or dispositions
• H01L 29/417 - Electrodes characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate
• H01L 21/336 - Field-effect transistors with an insulated gate

Abstract

The present application provides an energy storage system and a power supply system. The energy storage system comprises a battery pack, a power conversion assembly, a first liquid flow channel, a second liquid flow channel, a first driving device, a second driving device, and a flow distribution member. The first liquid flow channel is in thermally conductive contact with the battery pack, and the first driving device is communicated with the first liquid flow channel. The second liquid flow channel is in thermally conductive contact with the power conversion assembly, and the second driving device is communicated with the second liquid flow channel. The flow distribution member is separately communicated with the first liquid flow channel and the second liquid flow channel. When the flow distribution member is in a first working state, the first liquid flow channel is isolated from the second liquid flow channel. Control can be performed respectively according to temperature requirements of the battery pack and the power conversion assembly. When the flow distribution member is in a second working state, the first liquid flow channel is communicated with the second liquid flow channel to form an integral loop, and the heat of the power conversion assembly is used for heating the battery pack. A temperature control scheme can be adjusted according to working states, the space occupied by the energy storage system is reduced, and power consumption is reduced.

IPC Classes  ?

• H01M 10/6568 - Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
• H01M 10/617 - Types of temperature control for achieving uniformity or desired distribution of temperature
• B60H 1/03 - Heating, cooling or ventilating devices the heat being derived from the propulsion plant and from a source other than the propulsion plant
• B60K 11/02 - Arrangement in connection with cooling of propulsion units with liquid cooling

Abstract

This application describes examples of a grid-tied inverter apparatus and a grid-tied control method. In one example, the grid-tied inverter apparatus includes an inverter circuit, a controller, and a filter circuit. The controller is configured to adjust switching frequencies of a plurality of power switching transistors based on an output current value of the inverter apparatus, to adjust a resonance frequency of the filter circuit through different resonant branches, so that the resonance frequency meets a grid-tied requirement.

IPC Classes  ?

• H02M 7/5387 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion

Abstract

Example control methods and apparatus are described. An example control method for an uninterruptible power supply system includes: when a bypass power supply branch supplies power to a load, outputting a first drive signal to a first switch device and outputting a second drive signal to a second switch device; and controlling the first drive signal and the second drive signal to have a phase difference with an input voltage of the bypass power supply branch; or when a load current of the bypass power supply branch is less than a first threshold, outputting an inverter control signal to control an inverter power supply branch to charge an energy storage battery; or when a current of the inverter power supply branch flows back to an input end of the bypass power supply branch, turning off the first switch device and the second switch device via the inverter power supply branch.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

This application provides a power supply system and a conversion method. The power supply system includes a power generation apparatus, a converter circuit, and a drive control circuit. The drive control circuit may be configured to: when a power grid fails, control, based on duration of previous low voltage ride-through, the converter circuit to increase a value of a current to be output to the power grid from a first operating current value to a low voltage ride-through current value, to increase a voltage value at an output end of the converter circuit. Herein, the previous low voltage ride-through is latest low voltage ride-through. In this application, the system can control, based on duration of previous voltage ride-through, a current to be output by the converter circuit to the power grid, to reduce circuit oscillation, with a simple structure, a simple control method, and high safety.

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02J 3/01 - Arrangements for reducing harmonics or ripples
• H02J 3/16 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks

Abstract

Provided in the present application is a heat dissipation device, comprising an evaporator and a condenser. The evaporator comprises a casing and a partition plate; the casing is provided with a sealed inner chamber; the partition plate partitions the inner chamber into a first sub-chamber and a second sub-chamber; first pipes are communicated with the first sub-chamber; second pipes are communicated with the second sub-chamber; heating elements are further fixed in the first sub-chamber. The partition plate is provided with flow guide holes via which the first sub-chamber and the second sub-chamber are communicated, the flow guide holes being arranged towards the heating elements. A cooling working fluid in the condenser is transferred to the second sub-chamber by means of the second pipes; the cooling working fluid flows into the first sub-chamber by means of the flow guide holes and, after dissipating heat from the heating elements, flows back to the condenser by means of the first pipes so as to be cooled. By defining the flow path of the cooling working liquid, the heat dissipation device of the present application ensures sufficient contact between the cooling working fluid and the heating elements, thereby improving the heat dissipation effect of the heat dissipation device. Further provided in the present application are a plurality of heat dissipation devices, and a power converter comprising said heat dissipation devices.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A controller (1011, 3022) of an electric motor control module. An input end of the controller is connected to a rotation speed measurement apparatus, such that the controller can receive a rotation speed signal of an electric motor (1013, 3013) from the rotation speed measurement apparatus; a communication end of the controller is directly connected to a first communication bus (103, 303), such that the controller can directly acquire a vehicle speed of a vehicle from the first communication bus; and an output end of the controller is connected to a control end of an inverter circuit (1012, 3012) in the electric motor control module, such that the controller can output a control signal to the inverter circuit. When the vehicle speed of the vehicle and the rotation speed signal of the electric motor meet a preset condition, the controller controls the inverter circuit to adjust a current, which is to be outputted to the electric motor. Further provided are a control method for an electric motor, an electric driving system comprising a controller (101), and a vehicle (10) comprising an electric driving system. By means of the controller, trackslip of wheels can be quickly suppressed, and the intervention of trackslip suppression is rapid, such that good safety is achieved.

IPC Classes  ?

• B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performance; Adaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• B60W 30/18 - Propelling the vehicle

Abstract

The present application relates to the technical field of energy, and provides a charging apparatus and a charging system, for use in solving the problems of complex heat dissipation structure, high cost, etc. in charging apparatuses. The charging apparatus provided by the present application comprises a composite heat exchanger, first electronic devices, a second electronic device, and a housing; the composite heat exchanger comprises a first heat exchange body and a second heat exchange body, and the first heat exchange body is provided with a heat conduction portion and a heat dissipation portion; the second heat exchange body is provided with an evaporation end and a condensation end, a chamber is formed in the second heat exchange body, a cooling medium is provided in the chamber, and the cooling medium can circulate between the evaporation end and the condensation end; the first electronic devices are in heat-conducting connection with the heat conduction portion; the second electronic device is in heat-conducting connection with the evaporation end; the housing is connected to the heat conduction portion and the evaporation end, and a closed accommodating cavity is formed; the first electronic devices and the second electronic device are all located in the accommodating cavity. The charging apparatus provided by the present application has the advantages of simple structure, good heat dissipation effect, etc., and can ensure the leakproofness of the first electronic devices and the second electronic device.

IPC Classes  ?

• B60L 53/302 - Cooling of charging equipment
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• G06F 1/20 - Cooling means

Abstract

A controller (1011, 3011) of an electric motor control module, a control method for an electric motor, and a related device. An input end of the controller (1011, 3011) is connected to a rotation speed measurement apparatus, such that the controller (1011, 3011) can receive a rotation speed signal of an electric motor from the rotation speed measurement apparatus; a communication end of the controller (1011, 3011) is connected to a first communication bus (103, 303) and a slave controller (1041, 3041), such that the controller (103, 303) can directly acquire a vehicle speed of a vehicle from the first communication bus (103, 303), and can directly communicate with the slave controller (1041, 3041); and an output end of the controller (1011, 3011) is connected to a control end of an inverter circuit (1012, 3012) in the electric motor control module, such that the controller (1011, 3011) can output a control signal to the inverter circuit (1012, 3012). When the vehicle speed of the vehicle and a rotation speed signal of a first electric motor (1013, 3013) meet a preset condition, the controller (1011, 3011) controls the inverter circuit (1012, 3012) in the electric motor control module to adjust a current, which is to be outputted to the first electric motor (1013, 3013), and controls the slave controller (101, 3041) to adjust a current, which is to be outputted to a second electric motor (103, 3043) by an inverter circuit (1042, 3042), which is connected to the slave controller (101, 3041). Therefore, trackslip can be rapidly controlled, and the control precision and control efficiency are high.

IPC Classes  ?

• B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performance; Adaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• B60L 15/32 - Control or regulation of multiple-unit electrically-propelled vehicles
• B60L 15/38 - Control or regulation of multiple-unit electrically-propelled vehicles with automatic control
• H02P 29/40 - Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
• H02P 5/74 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
• H02P 5/46 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
• B60K 28/16 - Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle responsive to, or preventing, spinning or skidding of wheels
• B60W 30/18 - Propelling the vehicle

Abstract

The photovoltaic system includes an inverter, a fan, and a controller. A photovoltaic string and a direct current bus capacitor are connected between a positive input end and negative input end of the inverter. The controller receives a fast shutdown instruction and sends a drive signal to a switching transistor in the inverter, so that the switching transistor performs a switching action under the action of the drive signal, and the switching transistor consumes electric energy during the switching action; or the controller turns on the fan after receiving the fast shutdown instruction to consume electric energy by using the fan; or the controller may send the drive signal to the switching transistor and also control the fan to be turned on, so that both the switching transistor and the fan consume electric energy.

IPC Classes  ?

• H02H 7/20 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from norm for electronic equipment
• H02M 7/42 - Conversion of dc power input into ac power output without possibility of reversal
• H02S 40/30 - Electrical components

Abstract

A system for controlling a direct current bus voltage includes a controller and an inverter. The controller is configured to: obtain a power grid voltage; obtain a maximum sampling value of a direct current bus voltage of the inverter when the power grid voltage jumps, where the maximum sampling value of the direct current bus voltage is a maximum voltage value on the direct current bus in a time period for detecting a power grid voltage jump; obtain a first direct current bus voltage reference value based on the maximum sampling value of the direct current bus voltage; and obtain a second direct current bus voltage reference value based on the first direct current bus voltage reference value and a preset first rising gradient value, to limit a rising rate of the direct current bus voltage.

IPC Classes  ?

• H02J 1/06 - Two-wire systems

Abstract

A powertrain system and an electric vehicle to reduce a structure size of the powertrain system. The powertrain system includes two subsystems. The two subsystems are disposed side by side in a first direction and are symmetrical to each other. Each of the subsystems includes a motor, a deceleration mechanism, and an output shaft. A rotation shaft of the motor is disposed in a second direction. The deceleration mechanism includes a cylindrical gear pair and a bevel gear pair. The cylindrical gear pair includes an active cylindrical gear and a driven cylindrical gear, and the active cylindrical gear is connected to the rotation shaft of the motor. The driven cylindrical gear is located on a side that is of the active cylindrical gear and that is away or distal from the other subsystem. The bevel gear pair includes an active bevel gear and a driven bevel gear.

IPC Classes  ?

• B60K 17/04 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
• B60K 7/00 - Disposition of motor in, or adjacent to, traction wheel
• F16H 1/20 - Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members

Abstract

This application describes examples of a rotor disk and a manufacturing method thereof, a rotor structure, a disk motor, and an electric vehicle. In one example, the rotor disk includes a rotor iron core. The rotor iron core is provided with a plurality of groups of accommodating cavities at intervals in a circumferential direction of the rotor iron core. Each group of accommodating cavities includes a first accommodating cavity and a second accommodating cavity. The first accommodating cavity and the second accommodating cavity are provided in a radial direction of the rotor iron core and are in communication with each other. The first accommodating cavity and the second accommodating cavity are configured to respectively accommodate a first unit portion and a second unit portion of a first magnet.

IPC Classes  ?

• H02K 1/27 - Rotor cores with permanent magnets
• H02K 1/02 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the magnetic material
• H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines

Abstract

Provided in the present application are an electronic device, a power supply circuit and a control circuit thereof. The power supply circuit comprises a power factor correction circuit, a direct-current bus, an inverter circuit, a voltage conversion circuit, a bidirectional rectification circuit and a battery, wherein a first end of the power factor correction circuit receives an input voltage, a second end thereof is connected to the inverter circuit by means of the direct-current bus, and a third end thereof is connected to the battery in sequence by means of the voltage conversion circuit and the bidirectional rectification circuit. The battery in the power supply circuit provided by the present application can reuse some circuits, such as a power factor correction circuit, during charging and discharging, thereby reducing the structural complexity of the power supply circuit and an electronic device in which the power supply circuit is located.

IPC Classes  ?

• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

The present application provides a power conversion apparatus and a control method therefor, and a power supply system. The power conversion apparatus comprises a controller and n power conversion modules, wherein n is a positive integer greater than 1. The n power conversion modules are connected in parallel, and the n power conversion modules each comprise a power switch. The controller is used for outputting a first control signal to the n power conversion modules, so that the n power conversion modules synchronously work, determining phase shifting angles corresponding to the n power conversion modules according to the voltage oscillation frequencies of two ends of each of the power switches having the same serial number in the n power conversion modules that synchronously work, and outputting a second control signal to the n power conversion modules according to the phase shifting angles corresponding to the n power conversion modules, so that the n power conversion modules work at staggered phases. According to the power conversion apparatus and the control method therefor, and the power supply system of the present application, the voltage oscillation of the two ends of a power switch is effectively suppressed without increasing the hardware cost.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
• H02M 3/158 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 7/219 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration

Abstract

Disclosed in the present invention are a casing grounding detection method and an inverter. The inverter comprises: a positive electrode of a busbar, a negative electrode of the busbar, an earth wire terminal, a PID repair circuit, first and second detection resistors, and a casing, wherein the first detection resistor is connected to the positive electrode of the busbar and the casing, the second detection resistor is connected to the negative electrode of the busbar and the casing, and the repair circuit is connected to the negative electrode of the busbar and the casing; and the inverter is connected to a power generation assembly. The method comprises: collecting a first voltage, i.e. the voltage between a casing and an earth wire terminal; when the absolute value of the first voltage is not greater than a voltage threshold value, adjusting a second voltage by means of a repair circuit, wherein the second voltage is the voltage between a negative electrode of a busbar and the earth wire terminal; collecting a third voltage, i.e. the voltage between the casing and the earth wire terminal after the second voltage is adjusted; and according to whether the absolute value of the difference between the third voltage and the first voltage is not greater than a voltage difference threshold value, detecting whether the casing is grounded. In the present invention, whether the casing is grounded is determined according to a change in the voltage to ground of the casing, and no additional detection device is added, such that the safety of a system is improved.

IPC Classes  ?

• G01R 31/52 - Testing for short-circuits, leakage current or ground faults
• H02S 40/32 - Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules

Abstract

The disclosure relates to a build-up substrate (110) for a power package (100). The build-up substrate (110) comprises an electrically insulating layer (120) and a plurality of electrically conductive pads (131a-e) encapsulated in the electrically insulating layer (120). The electrically conductive pads (131a-e) are arranged to form an interleaved structure. The electrically conductive pads extend through the electrically insulating layer (120) from a first main surface (110a) to a second main surface (110b) of the insulating layer (120). The electrically conductive pads (131a-e) are aligned along a first major axis on the second main surface (110b). The build-up substrate (110) comprises a plurality of parallel conductors (132a-e) mounted on the second main surface (110b) of the electrically insulating layer (120). The parallel conductors (132a-e) are aligned along a second major axis on the second main surface (110b) of the electrically insulating layer (120). The first major axis is substantially orthogonal to the second major axis at a location on the second main surface (110b) of the electrically insulating layer (120) where a respective pad (131a-e) electrically connects a respective conductor (132a-e).

IPC Classes  ?

• H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
• H01L 21/683 - Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components for supporting or gripping
• H01L 21/48 - Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups
• H01L 23/498 - Leads on insulating substrates
• H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices

Abstract

A data processing system in the power station operation and maintenance system may determine a faulty module and a normal module based on module data of each photovoltaic module in a photovoltaic string, and obtain first power generation data of the faulty module and second power generation data of the normal module. Further, the data processing system may determine an annual lost energy yield of the faulty module based on the first power generation data, the second power generation data, and a preset energy yield of the photovoltaic power station, and obtain a target operation and maintenance measure from a plurality of operation and maintenance measures based on the annual lost energy yield. In this case, a communication system in the power station operation and maintenance system may notify an operation and maintenance user of the photovoltaic power station to perform operation and maintenance on the faulty module.

IPC Classes  ?

• H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks

Abstract

A variable flux permanent-magnet synchronous motor, a powertrain, and a fan are disclosed, which are applied to the field of motors. The variable flux permanent-magnet synchronous motor includes a stator system 10, a rotor system 20, and a variable magnet system 30. The variable magnet system 30 is located in the stator system 10 or the rotor system 20. The rotor system 20 includes a first permanent magnet 201. The variable magnet system 30 includes a second permanent magnet 301 and a heating apparatus 302. Coercive force of the second permanent magnet 301 is lower than coercive force of the first permanent magnet 201. The heating apparatus 302 is configured to heat the second permanent magnet 301, so that the second permanent magnet 301 has variable flux in a magnetic field.

IPC Classes  ?

• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
• H02K 11/25 - Devices for sensing temperature, or actuated thereby
• H02K 21/14 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures

Abstract

A photovoltaic system includes at least one first direct current module, an electromagnetic apparatus, a direct current switch-on/off apparatus, and a second direct current module. First connection ends of all first direct current modules in the at least one first direct current module are connected in parallel and then connected to a first connection end of the electromagnetic apparatus, a second connection end and a third connection end of the electromagnetic apparatus are connected to a first connection end of the second direct current module by using the direct current switch-on/off apparatus, and second connection ends of all the first direct current modules are connected in parallel and then connected to a second connection end of the second direct current module. The electromagnetic apparatus is configured to control the direct current switch-on/off apparatus to disconnect a loop between each first direct current module and the second direct current module.

IPC Classes  ?

• H02J 7/35 - Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

A powertrain, a control method, and a hybrid electric vehicle. The powertrain includes a motor controller unit and a motor. The motor controller unit includes N bridge arms, and the motor includes N motor windings corresponding to the N bridge arms. Each of the N bridge arms includes a first end and a second end, the first end of each bridge arm is connected to a positive bus, the second end of each bridge arm is connected to a negative bus, a midpoint of each bridge arm is connected to one end of one motor winding, the other end of each of the N motor windings is connected to one end of a power battery, and the other end of the power battery is connected to the positive bus or the negative bus.

IPC Classes  ?

• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
• B60L 15/00 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performance; Adaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train

Abstract

A power distribution subrack and power distribution equipment, and is related to the field of circuit technologies. The power distribution subrack includes a subrack body and a collection board, the collection board is disposed inside the subrack body, and the collection board includes a plurality of connection terminals and a plurality of controllers. Second ends of at least two of the plurality of connection terminals are connected to a same controller. First ends of at least some of the plurality of connection terminals are plug-connected to jacks of one or more circuit breakers, and the at least some connection terminals are in a one-to-one correspondence with the one or more circuit breakers. Each of the at least some connection terminals obtains a status signal of a corresponding circuit breaker, and transmits the status signal to a corresponding controller.

IPC Classes  ?

• H05K 7/14 - Mounting supporting structure in casing or on frame or rack
• H02B 1/04 - Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing

Abstract

The present disclosure discloses an energy storage converter, wherein a first end of the energy storage converter is coupled to at least one of the Q cell strings, and second end of the energy storage converter is configured to connect to a power grid. The first energy storage converter includes a DC/AC conversion unit and at least one DC/DC conversion unit. The DC/DC conversion unit is configured to perform adaptation between a voltage of the DC/AC conversion unit and a voltage of a cell string. Therefore, a cell capacity is fully used, and a waste of the cell capacity is reduced.

IPC Classes  ?

• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02J 3/34 - Arrangements for transfer of electric power between networks of substantially different frequency
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

Disclosed in the present application are a battery cover plate, a battery, a battery pack and an energy storage system, which are used for monitoring the opening state of an explosion-proof valve of a battery. The battery cover plate comprises a cover plate body, a first electrode assembly and an explosion-proof valve, wherein the cover plate body is provided with a first through hole; the first electrode assembly comprises a first insulating member and a first conductive sheet, the first insulating member is arranged on a first side of the cover plate body and covers the first through hole, the first insulating member is provided with a second through hole and an open slot, the second through hole is opposite the first through hole in terms of position, one end of the open slot is in communication with the first through hole, and the other end of the open slot extends to a side wall of the first insulating member and is in communication with the outside; the first conductive sheet is arranged on the side of the first insulating member that faces away from the cover plate body; and the explosion-proof valve is arranged on the surface of one side of the cover plate body and covers the first through hole, the explosion-proof valve is provided with a notch, which defines, on the explosion-proof valve, a turn-over portion in the shape of an open ring, and the turn-over portion is used for being turned over in the notch when stress is put on same, and comes into contact with the first conductive sheet after being turned over.

IPC Classes  ?

• H01M 50/342 - Non-re-sealable arrangements
• H01M 50/569 - Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
• H01M 50/15 - Lids or covers characterised by their shape for prismatic or rectangular cells
• H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells

Abstract

The present application provides a direct-current conversion circuit and a photovoltaic inverter. The direct-current conversion circuit comprises an RC circuit, and a first direct-current conversion unit and a second direct-current conversion unit which are connected to each other in parallel. The RC circuit comprises a resistor and a capacitor which are connected in series. The two terminals of the RC circuit are respectively connected to one terminal of a first switching tube in the first direct-current conversion unit and one terminal of a second switching tube in the second direct current conversion unit. When the state of the first switching tube or the second switching tube is switched, the other switching tube remains in an on or off state. The RC circuit is used for absorbing a peak voltage when the state of the first switching tube or the second switching tube is switched, so as to reduce the voltage change rate of the first switching tube or the second switching tube. The circuit cost of the direct-current conversion circuit is reduced, and the circuit design complexity is low.

IPC Classes  ?

• H02M 3/156 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
• H02M 3/158 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

The present disclosure relates to power systems and power generation systems based on photovoltaics (PV). The disclosure presents a power system with two PV-based power generation systems combined together. A first power generation system of the power system comprises one or more first PV strings, and comprises a first power conversion system connected to the one or more first PV strings. A second power generation system of the power system comprises one or more second PV strings, and comprises a second power conversion system connected to the one or more second PV strings. The power system also comprises one or more switches configured to selectively connect and disconnect the first power conversion system to and from the second power conversion system, and to selectively connect and disconnect the first power conversion system and the second power conversion system to and from earth.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 1/08 - Three-wire systems; Systems having more than three wires

Abstract

Embodiments of the present disclosure provide a rotor, a motor, a powertrain, and a vehicle. The rotor includes wedges and pole shoes. The wedges fit the pole shoes through curved portions. The curved portions can effectively relieve stress concentration of joint portions, increase strength of the wedges and the pole shoes, and effectively increase effective winding space of slots in the rotor. In this way, power density of a motor in which the rotor is used is increased.

IPC Classes  ?

• H02K 1/24 - Rotor cores with salient poles
• H02K 1/26 - Rotor cores with slots for windings
• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• H02K 3/487 - Slot-closing devices
• H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines

Abstract

A package structure includes a protection structure, a circuit board, and a chip. The circuit board includes a first cabling layer, a dielectric layer, and a second cabling layer that are laminated. The protection structure is disposed inside the dielectric layer. The protection structure is configured to electrically connect the first cabling layer to the second cabling layer, and the chip is electrically connected to the first cabling layer or the second cabling layer. When the chip is short-circuited, the protection structure blows first.

IPC Classes  ?

• H05K 1/02 - Printed circuits - Details

Abstract

A circuit breaker and a power supply system. The circuit breaker is disposed between a direct current power source and a load, the circuit breaker includes a first coil, a second coil, a switch unit, and a driver, where the switch unit and the driver form a linkage connection. The direct current power source is coupled to a first end of the first coil and a first end of the second coil, both a second end of the first coil and a second end of the second coil are coupled to one end of the switch unit, and the other end of the switch unit is coupled to the load. Inductive reactance of the first coil is less than inductive reactance of the second coil.

IPC Classes  ?

• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 3/155 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

Disclosed in the present application are a charging apparatus and a charging system. The charging apparatus comprises: a plurality of first alternating-current power supply lines, a plurality of first circuit groups, first direct-current buses, first switch circuits, which are located on the first alternating-current power supply lines, and a phase sequence detection circuit, which is connected to all the first alternating-current power supply lines, wherein rectifier circuits in all the first circuit groups are connected to charging circuits in all the first circuit groups by means of the first direct-current buses. A pooling design is performed on the first direct-current buses, such that a photovoltaic device and an energy storage device can be superposed onto the first direct-current buses. Moreover, whether phase sequences of the plurality of first alternating-current power supply lines are consistent is detected by means of the phase sequence detection circuit, when the phase sequences are consistent, all the first switch circuits are connected, and when the phase sequences are inconsistent, all the first switch circuits are disconnected, such that damage to a device due to wrong wiring can be avoided.

IPC Classes  ?

• B60L 53/30 - Constructional details of charging stations
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
• B60L 53/64 - Optimising energy costs, e.g. responding to electricity rates

Abstract

This application provides a fault handling system of a solid-state transformer, including a first power unit and a second power unit that are cascaded and connected. The first power unit includes a first auxiliary supply, a first control module, and a first communication module. The first auxiliary supply and the first control module are both electrically connected to two ends of a first busbar capacitor. The first control module is configured to detect a voltage of the first busbar capacitor. The second power unit includes a second auxiliary supply and a second control module. The second auxiliary supply and the second control module are both electrically connected to two ends of a second busbar capacitor. The first communication module outputs fault information to the second control module when the first control module detects that the voltage of the first busbar capacitor is greater than a threshold.

IPC Classes  ?

• H02H 7/04 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from norm for transformers
• H02H 1/00 - EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS - Details of emergency protective circuit arrangements

Abstract

This application provides an embedded package structure, a power supply apparatus, and an electronic device. First electronic components with smaller sizes are stacked, and then arranged in a substrate frame in a two-dimensional manner with a larger-size inductor component to form an embedded package structure. Then, a chip is disposed on the embedded package structure, so that the chip serving as a main heat source is placed on a surface of the power supply apparatus.

IPC Classes  ?

• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• H01L 23/373 - Cooling facilitated by selection of materials for the device
• H01L 23/538 - Arrangements for conducting electric current within the device in operation from one component to another the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates

Abstract

A power system includes N power modules and at least two adjustment units that are one-to-one coupled to the N power modules. Each adjustment unit is connected to a controller, and each power module is configured to perform power conversion. The adjustment unit is configured to: obtain a current working status of the corresponding power module, generate a status signal and a phase frequency signal, and send the status signal and the phase frequency signal to the controller. The controller generates an output power signal based on the status signal and the phase frequency signal. The adjustment unit is further configured to: obtain the output power signal, and adjust an output power of the corresponding power module based on the output power signal, where N is a positive integer greater than or equal to 2.

IPC Classes  ?

• H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
• H02J 5/00 - Circuit arrangements for transfer of electric power between ac networks and dc networks

Abstract

Provided are a multi-input power supply circuit and an electronic device. A sampling circuit (104) of a multi-input power supply circuit (10) comprises at least one resistor. The at least one resistor provides a voltage feedback signal for a control circuit (105) of the multi-input power supply circuit (10) according to an input voltage at an input interface (101) of the multi-input power supply circuit (10), and provides an isolation function between the input interface (101) and the control circuit (105). On the basis of implementing input voltage sampling and isolation, the sampling circuit (104) of the multi-input power supply circuit (10) has the beneficial effect of the complexity of a circuit structure being relatively low.

IPC Classes  ?

• H02J 4/00 - Circuit arrangements for mains or distribution networks not specified as ac or dc
• H02M 1/10 - Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

Provided in the present application are an energy storage system and an island detection method. The energy storage system comprises energy storage units, power conditioning systems, a frequency measurement circuit and a controller, wherein the controller executes first/second frequency adjustment control over the power conditioning system, adjusts the weight of the first/second frequency adjustment control according to a frequency difference between the frequency of an output voltage of the power conditioning system and a target frequency, controls the frequency of the output voltage of the power conditioning system to become the target frequency, and detects that an island phenomenon occurs in the power conditioning system. By means of the first/second frequency adjustment control, the frequency of the output voltage of the power conditioning system is adjusted in a first/second direction, wherein the first direction is a direction tending to a reference frequency of a power grid, and the second direction is a direction away from the reference frequency of the power grid. After an island occurs in a power conditioning system in an energy storage system, a controller can pull, to a target frequency, the frequency of an output voltage of the power conditioning system, in which the island occurs, such that an island phenomenon can be detected, and an anti-island protection action is completed.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/48 - Controlling the sharing of the in-phase component

Abstract

Provided in the present application are a heat dissipation system and a power apparatus. The heat dissipation system comprises a power module, an evaporator and a condenser, wherein the power module comprises a thermally conductive substrate and a power device fixed to a first surface of the thermally conductive substrate; the evaporator is provided with an evaporation cavity filled with a refrigerant; at least one side wall of the evaporator is provided with a window in which the thermally conductive substrate is embedded, at least part of the surface of the thermally conductive substrate is immersed in the refrigerant, and the first surface is located on the outer side of the evaporation cavity; heat generated by the power device is conducted by the thermally conductive substrate to the refrigerant to vaporize the refrigerant; and the condenser communicates with the evaporation cavity, so that the vaporized refrigerant can enter the condenser, and the refrigerant condensed into a liquid state by the condenser can flow back to the evaporation cavity. The phase-change heat transfer of the refrigerant can take away the heat generated by the power device, and reduce the thermal resistance from the power module to the air, which can improve the heat dissipation capability of the power module and is thus conducive to improving the product performance of the power apparatus in which the heat dissipation system is used.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A controller of an electric motor control module, a control method for an electric motor, and a related device. A communication end of the controller (1011, 3011, 4011) is connected to an assisted driving controller (203, 302, 402) or an autonomous driving controller (204, 303, 403); the controller (1011, 3011, 4011) receives a target speed and a target acceleration, which are sent by the assisted driving controller (203, 302, 402) or the autonomous driving controller (204, 303, 403); and an output end of the controller (1011, 3011, 4011) is connected to an inverter circuit (1012, 3012, 4012) in an electric motor control module, so that in response to a speed adjustment signal, the controller (1011, 3011, 4011) controls the inverter circuit (1012, 3012, 4012) to adjust a current which is output to a first electric motor (1013, 3013, 4013). A control delay of assisted driving or autonomous driving can be reduced, and good safety is achieved.

IPC Classes  ?

• B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performance; Adaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
• H02P 29/40 - Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load

Abstract

The present application discloses a grid-tie inverter system and a low-frequency oscillation suppression method. The system comprises a converter, a supplementary damping controller, a sampling circuit, and a controller. The converter is connected to a direct-current input end, a power grid, the controller, and the sampling circuit. The sampling circuit is connected to the supplementary damping controller. The controller is connected to the supplementary damping controller. The converter is used for outputting a grid-tie voltage, a grid-tie current and power to the power grid. The sampling circuit is used for detecting the grid-tie voltage, the grid-tie current and a power frequency of the power grid. When the power grid is in a low-frequency oscillation state, the supplementary damping controller is used for outputting a power supplement value to the controller on the basis of the grid-tie voltage and the power frequency. The power supplement value comprises an active power supplement value and a reactive power supplement value. According to the power supplement value, the controller is used for adjusting reactive power and active power output by the converter. According to the present application, output power of the converter is adjusted according to the power supplement value to suppress low-frequency oscillation, thereby reducing grid-tie voltage fluctuation and power generation loss.

IPC Classes  ?

• H02J 3/48 - Controlling the sharing of the in-phase component
• H02J 3/50 - Controlling the sharing of the out-of-phase component
• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks

Abstract

Embodiments of the present application provide a multi-level conversion circuit, comprising a bridge arm, an inductor, a first level conversion unit, and a second level conversion unit. The bridge arm is connected to the first level conversion unit and the second level conversion unit in parallel, and the midpoint of the bridge arm is connected to the inductor; each level conversion unit comprises a first switching transistor, a second switching transistor, a first capacitor, a second capacitor, and a level increasing circuit; series connection ends of the first capacitor and the second capacitor are connected to series connection ends of the first switching transistor and the second switching transistor by means of the level increasing circuit; the first capacitor and the first switching transistor of the first level conversion unit are connected to a first direct-current connection end; the second capacitor and the second switching transistor of the first level conversion unit are respectively connected to the first capacitor and the first switching transistor of the second level conversion unit; the second capacitor and the second switching transistor of the second level conversion unit are connected to a second direct-current connection end; and the level increasing circuit is used for increasing a circuit level. By using the present application, the switching voltage of each switching transistor can be reduced, and the current ripple of the inductor can be reduced.

IPC Classes  ?

• H02M 7/487 - Neutral point clamped inverters
• H02M 7/483 - Converters with outputs that each can have more than two voltage levels
• H02M 7/5387 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration

Abstract

The present application provides a converter and a control method therefor. The converter comprises a main switch transistor, an auxiliary switch transistor, a transformer, and a controller. After the converter operates, the controller obtains the output voltage of the converter and obtains a mode switching parameter on the basis of the output voltage of the converter; and controls the converter to switch between a first working mode and a second working mode according to the mode switching parameter. By adopting the present application, the efficiency of the converter under the full-range output voltage can be optimized.

IPC Classes  ?

• H02M 3/335 - Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

The present application provides a fault ride-through method applied to a converter. The converter comprises a conversion circuit and a filter inductor; an input end of the conversion circuit is configured to be connected to a direct-current source; a first end of the filter inductor is configured to be connected to an output end of the conversion circuit; and a second end of the filter inductor is configured to be connected to a load. The fault ride-through method is executed by the converter. The fault ride-through method comprises: measuring an inner potential vector of a first end and a terminal voltage vector of a second end of a filter inductor; and when the amplitude of the terminal voltage vector of the second end of the filter inductor decreases to be less than or equal to a preset terminal voltage extremum, reducing the inner potential vector of the first end of the filter inductor, so as to reduce the amplitude of a filter inductor current vector on the filter inductor to be less than or equal to a preset current amplitude limit value, wherein the inner potential vector, the terminal voltage vector, and the filter inductor current vector form a trigonometric function relationship. The present application also provides a converter.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection

Abstract

Provided in the present application are a power supply system and a grid-forming control method, which can increase the frequency synchronization speed of a grid-forming power generation device. The power supply system may comprise at least one new-energy power generation device. The new-energy power generation device may comprise a power converter and a control apparatus. The control apparatus can output an output voltage phase of the power converter according to the difference between a target output parameter of the power converter and an output parameter of a point of interconnection. When the phase difference of the voltages of the point of interconnection within a threshold time is greater than a preset threshold, the control apparatus adjusts the output voltage phase of the power converter.

IPC Classes  ?

• H02J 3/40 - Synchronising a generator for connection to a network or to another generator
• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

A heat dissipation apparatus (100), a power device and a photovoltaic system, which have a better heat exchange effect. The heat dissipation apparatus (100) may comprise a housing (110); a heat source is fixed on the outer surface of a first side wall (1101) of the housing (110), or the first side wall (1101) of the housing (110) is provided with a window (1131a), and a heat source is fixed on the outer surface of a heat-conducting substrate (1101b) embedded in the window (1131a); a first partition plate (111) is provided in the housing (110); the first partition plate (111) divides the housing (110) into a first cavity (112) and a second cavity (113), one or more channels (1111) are provided on the first partition plate (111), each channel (1111) is used for enabling the first cavity (112) to be communicated with the second cavity (113), and the end of each channel (1111) close to the first side wall (1101) faces an area of the first side wall (1101) where the heat source is fixed or faces the heat-conducting substrate (1101b).

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H02S 40/32 - Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
• H02M 7/00 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
• H02J 7/35 - Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells

Abstract

The present application provides a heat dissipation system and a power apparatus. The heat dissipation system can comprise a power module and a condenser. The power module can comprise a base and a power device, the base is provided with a first cavity, and the first cavity is filled with a refrigerant. The power device is provided on a first surface of the base, the power device is in thermally-conductive contact with the first surface, heat generated by the power device can be transmitted to the first cavity from the first surface and then conducted to the refrigerant, and the refrigerant can be vaporized into steam after being heated. In addition, the condenser is communicated with the first cavity, and the vaporized refrigerant can enter the condenser; and the refrigerant condensed by the condenser into a liquid state can flow back to the first cavity. The phase change heat exchange of the refrigerant can take away a large amount of heat generated by the power device, the thermal resistance from the power module to the air can be reduced, and the heat dissipation capability of the power module can be improved, so that the improvement of the product performance of the power apparatus using the heat dissipation system is facilitated.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

Provided in the present application are a power control method, a power converter and a power supply system. The power converter comprises a controller and a power conversion circuit, wherein the controller is connected to the power conversion circuit; the controller is used for obtaining a target power reference value of the power conversion circuit on the basis of the output electric quantity of the power conversion circuit, and a multi-segment droop hysteresis loop plane; and the controller is further used for controlling an output power value of the power conversion circuit to be equal to the target power reference value. By using the present application, the output power of the power converter in an area can be quickly adjusted in a scenario having a high photovoltaic-storage ratio, such that repeated continuous oscillations of the output power of the power converter are prevented, thereby improving the reliability and safety of the power converter.

IPC Classes  ?

• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
• H02M 7/42 - Conversion of dc power input into ac power output without possibility of reversal

Abstract

A photovoltaic system (10), and a circuit protection method for the photovoltaic system (10). The photovoltaic system (10) comprises an active protection switch (103), a direct current-direct current conversion circuit (106) and a controller (109), wherein one end of the active protection switch (103) is connected to a photovoltaic assembly, the other end thereof is connected to an input end of the direct current-direct current conversion circuit (106), and an output end of the direct current-direct current conversion circuit (106) is connected to a load; and the controller (109) is used for: when the reverse current of a photovoltaic unit (101) is greater than or equal to a current threshold value, issuing, to the active protection switch (103) and according to the input voltage of the direct current-direct current conversion circuit (106), a disconnection instruction for triggering the disconnection of the active protection switch (103), and when the active protection switch (103) is not effectively disconnected within a preset duration after the disconnection instruction is issued to the active protection switch (103), adjusting the input voltage of the direct current-direct current conversion circuit (106) to be less than or equal to a first voltage threshold value. The safety and reliability of the photovoltaic system (10) can be improved.

IPC Classes  ?

• H02H 7/00 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from norm
• H02H 7/20 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from norm for electronic equipment
• H02S 40/30 - Electrical components

Abstract

Provided are an electromagnetic apparatus and an electronic device. The electromagnetic apparatus comprises a housing, a magnetic component and a cover. An opening is formed at a first end of the housing; the housing is internally provided with an accommodating cavity; the accommodating cavity is communicated with the opening; and the accommodating cavity is filled with a fluid-like heat conduction medium. The cover has a first surface and a second surface which are opposite to each other; the magnetic component is fixedly connected to the first surface of the cover; the first surface of the cover faces the first end of the housing, and the cover is fixedly connected to the housing, such that the magnetic component is located in the accommodating cavity, and the heat conduction medium coats the magnetic component. When using the described solution, the cover is fixedly connected to the housing, and the magnetic component is located in the accommodating cavity, such that the heat conduction medium coats the magnetic component; the cover seals the housing to form a sealing structure, thereby avoiding overflowing of the fluid-like heat conduction medium; the heat conduction medium can be gradually cured in the sealing structure formed by the cover and the housing, and subsequent procedures can be implemented after the cover seals the housing, such that the curing procedure can be omitted, thereby improving the production efficiency of magnetic components.

IPC Classes  ?

• H01F 27/02 - Casings
• H01F 27/08 - Cooling; Ventilating
• H01F 27/10 - Liquid cooling

Abstract

A battery cell, a battery module, a battery pack, an energy storage system, and an electric vehicle. The battery cell includes one or more stress sensors. The stress sensors are located on the explosion-proof valve and face outside a housing of the battery cell, or the stress sensors are located on the explosion-proof valve and face inside a housing of the battery cell. Each stress sensor is configured to detect stress that is inside the battery cell and that acts on a corresponding position on the explosion-proof valve, and the one or more stress sensors are configured to transmit all obtained electrical signals to processor. The processor determines a faulty target battery cell based on one or more received electrical signals.

IPC Classes  ?

• H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
• H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
• H01M 10/613 - Cooling or keeping cold
• H01M 10/63 - Control systems
• H01M 50/103 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
• H01M 50/15 - Lids or covers characterised by their shape for prismatic or rectangular cells
• H01M 50/342 - Non-re-sealable arrangements

Abstract

A multi-inverter parallel system are provided. The system includes a first inverter and a second inverter. The first inverter includes a first controller, a first inverter circuit, and a first relay. The second inverter includes a second controller, a second inverter circuit, and a second relay. Phases of an output end of the first inverter circuit are correspondingly connected to phases of an output end of the second inverter circuit. The first controller may control the first relay to be turned on. The second controller may control, when the second relay is turned off, a direct current bus voltage of the second inverter circuit to be the same as a direct current bus voltage of the first inverter circuit, and control a common-mode voltage injection manner of the second inverter circuit to be the same as a common-mode voltage injection manner of the first inverter circuit.

IPC Classes  ?

• H02M 7/5387 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
• H02M 1/12 - Arrangements for reducing harmonics from ac input or output
• H02M 7/5395 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation

Abstract

This application discloses a photovoltaic system and a carrier wave signal synchronization method. The photovoltaic system includes a plurality of inverters and a controller. Each inverter in the photovoltaic system inverts a direct current into an alternating current based on a received carrier wave signal, and transmits the alternating current to a power grid. The controller obtains first output currents of the plurality of inverters in an adjustment period, so that the controller can obtain first output current valid values of the plurality of inverters based on the first output currents of the plurality of inverters.

IPC Classes  ?

• H02J 3/40 - Synchronising a generator for connection to a network or to another generator
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 7/493 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel

Abstract

The present application discloses a semiconductor device and a preparation method therefor, a power conversion circuit, and a vehicle. The semiconductor device comprises: an N-type semiconductor substrate, an epitaxial layer, a trench structure, a gate, an interlayer dielectric layer, a source, and a drain. The epitaxial layer comprises a first P-type semiconductor region. The bottom of the trench structure is in contact with the first P-type semiconductor region. The trench structure comprises a plurality of first trenches and a second trench, the first trenches extending in a first direction, and the second trench intersecting each of the plurality of first trenches and being in electrical communication with the first trenches. The gate is applied in the trench structure across a gate dielectric layer. The interlayer dielectric layer covers the gate and is provided with a contact hole extending in a second direction. The source is arranged on the interlayer dielectric layer. The source is in contact with a source region through the contact hole and is in electrical communication with the first P-type semiconductor region. The drain is arranged on the side of the semiconductor substrate away from the epitaxial layer. In this way, the total on resistance of the device is reduced.

IPC Classes  ?

• H01L 33/48 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof characterised by the semiconductor body packages
• H01L 29/786 - Thin-film transistors
• H01L 21/336 - Field-effect transistors with an insulated gate

Abstract

Disclosed in the embodiments of the present application are a motor controller, a powertrain and an electric vehicle. The motor controller comprises an inverter circuit, the inverter circuit comprising three bridge arms. Each bridge arm comprises an upper bridge switching transistor and a lower bridge switching transistor, and bridge arm midpoints of the three bridge arms are respectively connected to three-phase windings of a driving motor. In response to the current frequency of at least one phase of windings being greater than or equal to a first frequency threshold value, the three upper bridge switching transistors or the three lower bridge switching transistors are switched from an alternating turn-on mode to a holding turn-on mode or a holding turn-off mode, or the three upper bridge switching transistors and the three lower bridge switching transistors are switched from an alternating turn-on mode to a holding turn-off mode. In response to the current frequency of at least one phase of windings being less than a second frequency threshold value, the three upper bridge switching transistors and the three lower bridge switching transistors are switched from an alternating turn-on mode to a holding turn-off mode, or the three upper bridge switching transistors or the three lower bridge switching transistors are switched from a holding turn-on mode to a holding turn-off mode. The embodiments of the present application can improve the control accuracy of motor controllers.

IPC Classes  ?

• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
• H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control
• B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performance; Adaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed

Abstract

Disclosed in the embodiments of the present application are a communication method and apparatus, wherein the method is applied to a first node, the first node is provided with a plurality of channels, different channels among the plurality of channels respectively bear information of different priorities, and the channels are physical channels, which are established by means of power lines. The method comprises: a first node generating a first message, which comprises first information; sending the first message to a second node by means of a first channel, wherein the first channel is a channel which bears information of a first priority among a plurality of channels, and the first priority is the priority of the first information; and the second node establishing a connection with the first node by means of a power line. In the embodiments of the present application, since information of different priorities can be sent by means of different channels, the information of different priorities can be sent by means of different channels at the same time, such that the waiting time of information can be shortened, and the transmission rate of the information in power line communication can thus be improved.

IPC Classes  ?

• H04B 3/54 - Systems for transmission via power distribution lines
• H04L 47/6275 - Queue scheduling characterised by scheduling criteria for service slots or service orders based on priority

Abstract

This application discloses examples of an energy storage system, a power conversion system, and a method for optimizing primary frequency modulation. In one example, when the power conversion system determines that a state of charge (SoC) value of a target energy storage battery does not meet a target SoC value and determines that a present frequency of a power grid falls within a frequency modulation constant band, the power conversion system determines, based on a preset mapping relationship between a SoC value and an active power, a first specified active power value corresponding to the SoC value of the target energy storage battery, and controls, based on the first specified active power value, the target energy storage battery to be charged or discharged, so that the SoC value of the target energy storage battery can reach the target SoC value.

IPC Classes  ?

• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H02J 3/34 - Arrangements for transfer of electric power between networks of substantially different frequency
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

An axial flux motor includes a motor shaft, a double-row angular contact ball bearing, and a stator. The double-row angular contact ball bearing is sleeved on the motor shaft and is fixedly connected to the motor shaft through a bearing inner ring of the double-row angular contact ball bearing. The stator is sleeved on the motor shaft through the double-row angular contact ball bearing, and the stator is fixedly connected to a bearing outer ring, so that the motor shaft can rotate relative to the stator. In this application, the double-row angular contact ball bearing is used in the axial motor, the double-row angular contact ball bearing can bear axial force generated through interaction between the stator and a rotor.

IPC Classes  ?

• H02K 1/2798 - Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the stator face a rotor
• H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
• H02K 7/08 - Structural association with bearings
• H02K 16/02 - Machines with one stator and two rotors

Abstract

Disclosed in the present application are a semiconductor device, a preparation method, a power conversion circuit and a vehicle. The semiconductor device comprises: an N-type semiconductor substrate, a first epitaxial layer, a plurality of gate trenches which are spaced apart from each other, a gate, an interlayer dielectric layer, a source and a drain. The first epitaxial layer comprises a plurality of first P-type semiconductor regions, said first P-type semiconductor regions being arranged below the gate trenches; the gate trenches are arranged in the first epitaxial layer; the gate comprises first gates and second gates which are in contact with each other, the first gates filling the gate trenches and thus being separated by gate dielectric layers, and the second gates being arranged at the top of the first epitaxial layer; the interlayer dielectric layer covers the side of the gate away from the semiconductor substrate and is provided with contact holes extending in a second direction; the source is arranged on the side of the interlayer dielectric layer away from the semiconductor substrate, and makes contact with the first epitaxial layer by means of the contact holes; the drain is arranged on the side of the semiconductor substrate away from the first epitaxial layer. The total on-resistance of the device is reduced, and the robustness of the device is improved.

IPC Classes  ?

• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate
• H01L 21/336 - Field-effect transistors with an insulated gate

Abstract

The present application discloses a semiconductor device and a preparation method therefor, a power conversion circuit and a vehicle. The semiconductor device comprises: an N-type semiconductor substrate, an epitaxial layer, a trench structure, a gate electrode, an interlayer dielectric layer, a source electrode and a drain electrode, wherein the trench structure is arranged in the epitaxial layer, the trench structure comprising a plurality of first trenches and a second trench, the first trenches extending in a first direction and being arranged at intervals in a second direction, the second trench extending in the second direction, and the second trench and each of the plurality of first trenches being cross-arranged and being in communication with each other; the gate electrode is filled in the trench structure across a gate dielectric layer; the interlayer dielectric layer covers the gate electrode and is provided with contact holes extending in the second direction; the source electrode is arranged on the interlayer dielectric layer and is in contact with the epitaxial layer via the contact holes; and the drain electrode is arranged on a side of the semiconductor substrate away from the epitaxial layer. In this way, the total on-resistance of the device is reduced.

IPC Classes  ?

• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate

Abstract

The present application discloses a semiconductor device, a manufacturing method, a power conversion circuit, and a vehicle. The semiconductor device comprises: an N-type semiconductor substrate, a first epitaxial layer, multiple gate trenches that are spaced apart from each other, a gate, an interlayer dielectric layer, a source, and a drain. The multiple gate trenches are arranged in the first epitaxial layer; the multiple gate trenches extend in a first direction; the gate comprises a first gate and a second gate in contact with each other, wherein the gate trenches are filled with the first gate with a gate dielectric layer interposed therebetween, and the second gate is arranged at the top of the first epitaxial layer with a gate dielectric layer interposed therebetween; the interlayer dielectric layer covers the side of the gate away from the semiconductor substrate, and is provided with a contact hole extending in a second direction; the source is arranged on the side of the interlayer dielectric layer away from the semiconductor substrate, and is in contact with the first epitaxial layer by means of the contact hole; and the drain is arranged on the side of the semiconductor substrate away from the first epitaxial layer. Thus, the total on-resistance of a device is reduced.

IPC Classes  ?

• H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate
• H01L 29/423 - Electrodes characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
• H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
• H01L 21/336 - Field-effect transistors with an insulated gate
• H01L 29/16 - Semiconductor bodies characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic System in uncombined form

Abstract

Provided are a box for an energy storage device, an energy storage device and an energy storage system. The box comprises four stand columns, three side plates, a partition plate, a bottom plate and a sealing door, wherein the three side plates, the partition plate and the bottom plate are fixed by means of the four stand columns and enclose a closed second accommodation zone together with the sealing door; and the four stand columns and the partition plate enclose an open first accommodation zone. In the box provided in the present application, by means of reducing the height of the partition plate, the recessed open first accommodation zone is formed and used for accommodating external components of an energy storage device, such that the heat dissipation efficiency of the energy storage device can be improved, and the standardization of the overall size of the energy storage device can also be ensured; and the space required by the stacking of a plurality of energy storage devices or the occupied area required by the adjacent arrangement thereof can be reduced, thereby increasing the energy storage density of an energy storage system and reducing construction costs.

IPC Classes  ?

• H01M 50/244 - Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
• H02B 1/46 - Boxes; Parts thereof or accessories therefor

Abstract

A power supply module, a vehicle-to-vehicle (V2V) power supply control method, and a vehicle. The power supply module is arranged between a power battery (110) of a first vehicle (11) and a charging interface (111) of the first vehicle (11), and in the power supply module, a first end and a second end of a powertrain (112) are respectively connected to two ends of the power battery (110) of the first vehicle (11); the first end of the powertrain (112) is further connected to a first charging interface of the first vehicle (11), and a third end of the powertrain (112) is connected to a second charging interface of the first vehicle (11) by means of a first switch unit; a control unit (114) acquires the voltage of the power battery (110) of the first vehicle (11) and the voltage of a power battery of a second vehicle (12), and under the condition that the voltage of the power battery (110) of the first vehicle (11) is greater than the voltage of the power battery of the second vehicle (12), controls the first switch unit to be turned off; in this case, the powertrain (112) is controlled to reduce the voltage of the power battery (110) of the first vehicle (11). V2V is realized by reusing the powertrain (112) in the first vehicle (11), so that costs are low.

IPC Classes  ?

• B60L 53/22 - Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• B60L 53/14 - Conductive energy transfer

Abstract

The disclosure relates to a prepackage module (100) for embedding into a multilayer printed circuit board (PCB) (500). The prepackage module comprises: a power semiconductor component (140) comprising at least two terminals (141, 142); an electrically isolating and thermally conductive substrate (130) for transfer of heat from the power semiconductor component (140) to a heat sink. The substrate (130) comprises: a first metal layer (131a, 131b) structured to form at least one contact pad; a second metal layer (132); and a thermally conductive isolation material layer (133) for electrically isolating the first metal layer (131a, 131b) from the second metal layer (132). The prepackage module comprises a mold body (150) at least partly encapsulating the power semiconductor component (140) and the substrate (130). The prepackage module comprises: a first electrically and thermally conductive spacer (111) electrically contacting the first terminal (141) of the power semiconductor component (140); and a second electrically and thermally conductive spacer (112) electrically contacting a first contact pad (131a) of the first metal layer (131a, 131b).

IPC Classes  ?

• H01L 23/373 - Cooling facilitated by selection of materials for the device
• H01L 23/498 - Leads on insulating substrates
• H01L 23/538 - Arrangements for conducting electric current within the device in operation from one component to another the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates
• H01L 23/367 - Cooling facilitated by shape of device
• H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
• H01L 23/433 - Auxiliary members characterised by their shape, e.g. pistons

Abstract

A packaged device includes a circuit board, an electronic component, and a heat storage portion. The electronic component is electrically coupled to the circuit board; and the heat storage portion is disposed on the circuit board or embedded in the circuit board, and the heat storage portion is adjacent to the electronic component, where a specific heat capacity of the heat storage portion is higher than a specific heat capacity of the circuit board, and the heat storage portion is configured to store and release heat. A heat storage material with a relatively high specific heat capacity is introduced into the packaged device, and the heat storage portion is disposed on the circuit board around the electronic component where a large amount of heat generated by the electronic component in a short time can be quickly stored in the heat storage portion and then released to the outside.

IPC Classes  ?

• H01L 23/367 - Cooling facilitated by shape of device
• H01L 23/13 - Mountings, e.g. non-detachable insulating substrates characterised by the shape
• H01L 23/373 - Cooling facilitated by selection of materials for the device

Abstract

A packaging device includes a first circuit substrate and a second circuit substrate that are electrically connected. The first circuit substrate includes a first line layer and a first insulation layer that are sequentially stacked, and a first electronic component is disposed on the first circuit substrate. The second circuit substrate includes a second line layer and a second insulation layer that are sequentially stacked, and a second electronic component is disposed on the second circuit substrate. A thermal conductivity of the first insulation layer is higher than a thermal conductivity of the second insulation layer. This application further provides a packaging module and an electronic device in which the packaging device is used. The packaging device in this application, the first insulation layer and the second insulation layer with different thermal conductivities are targetedly configured, and layouts of the first circuit substrate and the second circuit substrate are flexible.

IPC Classes  ?

• H01L 23/498 - Leads on insulating substrates
• H01L 23/373 - Cooling facilitated by selection of materials for the device
• H01L 25/07 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group

Abstract

A photovoltaic power generation system includes a single-stage inverter, an anti-backflow circuit, a photovoltaic string, and a coupling capacitor. The anti-backflow circuit is connected to one input end of the single-stage inverter, one output end of the photovoltaic string is connected to the other input end of the single-stage inverter, and the other output end of the photovoltaic string is connected to the anti-backflow circuit. The photovoltaic string includes a buck optimizer and a photovoltaic panel. The anti-backflow circuit is configured to prevent a backflow current from flowing back to the photovoltaic string. The coupling capacitor is connected in parallel to two ends of the anti-backflow circuit and is configured to transmit a signal between each buck optimizer in the photovoltaic string and the single-stage inverter, to control backflow of the backflow current when the anti-backflow circuit fails.

IPC Classes  ?

• H02S 40/32 - Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02S 10/00 - PV power plants; Combinations of PV energy systems with other systems for the generation of electric power

Abstract

A protection apparatus includes an interface, a protection switch, a direct current bus, and a controller. The apparatus is connected to at least two photovoltaic units via the interface, the at least two photovoltaic units are coupled to the direct current bus inside the apparatus to form at least two branches, and each branch is connected to at least one photovoltaic unit. The protection switch is configured to disconnect all or some of the photovoltaic units from the direct current bus, to enable a maximum of three photovoltaic units to be directly connected in parallel. According to the apparatus, a photovoltaic unit and a line are protected with a low power loss when a photovoltaic power generation system is faulty.

IPC Classes  ?

• H02H 3/087 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current for dc applications
• H02H 3/18 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to reversal of direct current
• H02S 40/32 - Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
• H02S 40/36 - Electrical components characterised by special electrical interconnection means between two or more PV modules, e.g. electrical module-to-module connection

Abstract

This application relates to the field of motor technologies, and provides a motor rotor, a drive motor, and an electric vehicle. In the motor rotor, a rotor core with at least two protruding components is designed. At least two magnetic steels and at least two sheets are disposed in grooves between the at least two protruding components and then coupled to the rotor core with a rotor pressing plate. In addition, one SMC sheet is stacked on each of the magnetic steels, so that an eddy current loss of a permanent magnet can be effectively reduced. Each of the magnetic steels is disposed in a groove between protruding components, and the SMC sheet is added, so that a saliency ratio is increased, a reluctance torque ratio is increased, and a quantity of magnetic steels for use is reduced.

IPC Classes  ?

• H02K 1/2798 - Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the stator face a rotor
• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• H02K 21/24 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos

Abstract

This application provides a photovoltaic energy storage control module and a photovoltaic energy storage control method. A control component included in the photovoltaic energy storage control module can set reference values of bus voltages of a first direct-current converter, a second direct-current converter, and an inverter. Further, the first direct-current converter, the second direct-current converter, and the inverter can automatically adjust a power supply relationship among the first direct-current converter, the second direct-current converter, and the inverter based on a value relationship among the reference values of the bus voltages of the first direct-current converter, the second direct-current converter, and the inverter. In this way, flexibility of the photovoltaic energy storage control module is improved.

IPC Classes  ?

• H02S 40/38 - Energy storage means, e.g. batteries, structurally associated with PV modules
• H02J 7/35 - Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
• H02S 40/32 - Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules

Abstract

This disclosure discloses a power adapter and an electronic device system, and relates to the field of heat dissipation technologies. The power adapter includes a housing, a printed circuit board assembly, and insulation powder filled in the housing. The printed circuit board assembly is fastened in the housing, and the insulation powder is used to conduct heat generated by the printed circuit board assembly to the housing. Compared with a thermally conductive adhesive, the insulation powder does not have a problem of poor fluidity, and can more easily be sufficiently filled. This solution improves heat dissipation effect of the power adapter and helps further increase a charging power of the power adapter.

IPC Classes  ?

• H05K 1/02 - Printed circuits - Details
• B60L 53/14 - Conductive energy transfer
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

Disclosed in embodiments of the present application are a power supply system and a control method therefor. The power supply system comprises N distributed power supplies and at least one detection control unit; the N distributed power supplies are connected in parallel or in series and then connected to a power grid, wherein N is an integer greater than 1; the detection control unit is used for obtaining a power compensation control ratio of each distributed power supply on the basis of the impedance from each distributed power supply to a grid entry point of the power supply system when detecting that oscillation of the power supply system exceeds a preset threshold range, wherein the power compensation control ratio is a ratio of the power output by each distributed power supply to the total power output by the power supply system; the detection control unit is also used for controlling a power output ratio of each distributed power supply on the basis of the power compensation control ratio. By using the embodiments of the present application, oscillation of the power supply system can be inhibited, normal and stable operating of the power supply system can be guaranteed, and there is no need to change the original control circuit and provide an additional device, such that the implementation complexity is low and the implementation cost is low.

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers

Abstract

Provided is a vehicle control unit (104). A motor control unit (103) is connected to the vehicle control unit (104) and sends a first signal to the vehicle control unit (104); an electronic stability program (105) is connected to the motor control unit (103) or the vehicle control unit (104) and sends a second signal; and the vehicle control unit (104) is used for sending a third signal to the motor control unit (103). Before receiving the second signal, the vehicle control unit (104) generates and sends, by using the first signal sent by the motor control unit (103), the third signal to any one or more motor control units (103) in at least one motor control unit (103), so that the motor control unit (103) receiving the third signal adjusts torque so as to perform stability control on a vehicle. Thus, the control speed of the whole control process is higher, and the slip rate of a vehicle on a slippery road can be reduced. Also provided are a motor control unit and a related device.

IPC Classes  ?

• B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performance; Adaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• B60R 16/023 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric for transmission of signals between vehicle parts or subsystems

Abstract

The present application provides a photovoltaic inverter and a control method therefor. The photovoltaic inverter is suitable for a power supply system, and the photovoltaic inverter comprises a conversion circuit, an acquisition circuit, and a controller; the acquisition circuit is used for acquiring a positive direct-current bus voltage and a negative direct-current bus voltage of the conversion circuit; and the controller is used for generating an even harmonic voltage regulation signal on the basis of the positive and negative direct-current bus voltages of the conversion circuit and the phase of the output voltage of the photovoltaic inverter, and generating a driving control signal on the basis of the even harmonic voltage regulation signal to control the on or off of a switching transistor in the conversion circuit, so as to control the conversion circuit to output a target voltage and reduce the difference between the positive and negative direct-current bus voltages of the conversion circuit. By using the present application, the on or off of the switching transistor in the conversion circuit can be regulated, the voltage stability of a midpoint of the conversion circuit is improved, the structure is simple, the method is simple and convenient, and high applicability is achieved.

IPC Classes  ?

• H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02M 7/487 - Neutral point clamped inverters
• H02M 7/5387 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
• H02S 40/32 - Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules

Abstract

Provided in the present application are a power conversion apparatus and an energy storage system. The power conversion apparatus comprises a power conversion circuit, a first power terminal, a second power terminal and a third power terminal, the power conversion circuit comprising a first positive end, a first negative end, a second positive end, a second negative end and at least one power device, wherein the potentials of the first negative end and the second negative end are the same; the power conversion circuit is used for converting, into a second voltage, a first voltage input by a first device, and outputting the second voltage to a second device; and the first power terminal is connected to the first positive end, the first negative end and/or the second negative end is connected to the second power terminal, and the third power terminal is connected to the second positive end. By using the power conversion apparatus provided in the present application, a power current flowing through a single board of a power conversion circuit can be minimized, thereby reducing the heat and current-through loss on the single board, and thus improving the system efficiency and reliability.

IPC Classes  ?

• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
• H02M 3/158 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means

Abstract

Disclosed in the present invention are a plastic packaging module, a plastic packaging method and an electronic device. The plastic packaging module comprises a substrate, a solder resist layer is provided on a surface of the substrate, solder is placed in an enclosed area formed by the solder resist layer, a chip and the substrate are fixed by means of the solder, and the substrate and the chip fixed on the substrate are plastic-packaged to form the plastic packaging module. Also disclosed are a corresponding plastic packaging method and an electronic device. Using the solution of the present application, the solder resist layer not only provides a solder resist effect, but can also provide highly reliable joining of the solder resist layer and the substrate, and highly reliable joining between the solder resist layer and the plastic packaging material of the plastic packaging module.

IPC Classes  ?

• H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
• H01L 21/56 - Encapsulations, e.g. encapsulating layers, coatings
• H01L 23/498 - Leads on insulating substrates

Abstract

Provided in the present application are a power device, an electronic device, and a circuit structure. The power device comprises: a power element, a current sampling element and a compensation element, wherein the power element comprises: a first control end, a first electrode and a second electrode; the current sampling element is used for measuring a current value between the first electrode and the second electrode of the power device; the current sampling element comprises: a second control end, a third electrode and a fourth electrode, the second control end being connected to the first control end, the third electrode being connected to the first electrode, and the fourth electrode being connected to the second electrode by means of the compensation element; the current sampling element is connected in series to the compensation element; the temperature coefficient of the current sampling element is opposite to that of the compensation element; and the compensation element can compensate for sampling value deviations of the current sampling current in different temperatures, such that sampling values outputted by the current sampling element when same samples the same current in different temperatures are the same or similar. Therefore, the voltage stress of a power device when overcurrent protection or short-circuit protection is triggered is reduced, and turn-off loss is reduced, thereby improving the current output capacity of the power device.

IPC Classes  ?

• H03K 17/14 - Modifications for compensating variations of physical values, e.g. of temperature

Abstract

A voltage conversion apparatus, a control method, and a power supply device. The voltage conversion apparatus includes a control circuit. The control circuit is configured to: obtain a first sampling voltage and a second sampling voltage; detect a resonant period based on the second sampling voltage when it is determined, based on the first sampling voltage, that a voltage range of an output voltage of the voltage conversion apparatus changes and a voltage threshold is exceeded; and output a drive signal based on the detected resonant period. The drive signal is used to control turn-on and turn-off of a first switching transistor and a second switching transistor.

IPC Classes  ?

• H02M 3/335 - Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion

Abstract

An axial motor includes a fastening plate and a plurality of magnetic cores. The plurality of magnetic cores are spaced apart around the inner shaft sleeve. A magnetic core end part of the magnetic core covers a part of an end surface of a magnetic core winding part of the magnetic core, and an end surface, of the magnetic core winding part, that is not covered by the magnetic core end part forms a step surface. The fastening plate is fastened to an end surface of the inner shaft sleeve. The fastening plate includes an accommodating groove that is concave relative to the end surface of the inner shaft sleeve. A plurality of magnetic core accommodating holes are provided in the accommodating groove. The plurality of magnetic core accommodating holes respectively correspond to magnetic core end parts that accommodate the plurality of magnetic cores.

IPC Classes  ?

• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
• H02K 21/24 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos

Abstract

A power conversion apparatus and an energy storage system, including a power conversion circuit, a first power terminal, a second power terminal, and a third power terminal. The power conversion circuit includes a first positive end, a first negative end, a second positive end, a second negative end, and at least one power device. The first negative end and the second negative end have a same potential. The power conversion circuit is configured to convert a first voltage input by a first device into a second voltage and output the second voltage to a second device. The first power terminal is connected to the first positive end, the first negative end or the second negative end is connected to the second power terminal, and the third power terminal is connected to the second positive end.

IPC Classes  ?

• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
• H02M 3/158 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Abstract

An electronic device includes a lower housing and an upper cover that are connected to each other. The upper cover has a bending structure that faces a direction of the lower housing, an end that is of the lower housing and that faces the upper cover has a flanging structure, the flanging structure overlaps a bottom wall of the bending structure, and the upper cover and the lower housing are connected at an overlapping part of the bending structure and the flanging structure.

IPC Classes  ?

• H05K 5/02 - Casings, cabinets or drawers for electric apparatus - Details
• H05K 5/00 - Casings, cabinets or drawers for electric apparatus
• H05K 5/03 - Covers

Abstract

A battery system comprises a first busbar, at least one battery rack, and a control circuit are included. The battery rack includes a plurality of battery units. Each battery unit includes a battery module, a connection switch K1, and an isolation switch K2. The connection switch K1 is connected in series to the battery module to form a first branch, and the isolation switch K2 is connected in parallel to the first branch. The control circuit is connected to control ends of the connection switch K1 and the isolation switch K2, and is configured to: control, based on a first voltage required by the load, connection switches K1 and isolation switches K2 of N battery units in the battery rack, to make an output voltage of the first busbar meet the first voltage required by the load.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

A cooling device is provided, which comprises a cooling circuit comprising an evaporator and a compressor connected to the evaporator by a first fluid line of the cooling circuit, wherein the compressor is adapted to compress cooling agent in the cooling circuit during an active cooling mode, wherein the compressed cooling agent contains lubricant oil from the compressor. The cooling circuit comprises a condenser, which is connected to the compressor by a second fluid line of the cooling circuit. The second fluid line is connected to a fluid by-pass line of the cooling circuit by a separating portion, and wherein the separating portion is adapted to physically separate lubricant oil from the compressed cooling agent, so that the lubricant oil is collected in the fluid by-pass line.

IPC Classes  ?

• F25B 43/02 - Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
• F25B 9/00 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
• F25B 41/20 - Disposition of valves, e.g. of on-off valves or flow control valves

Abstract

A stator, a motor, and an electric vehicle are provided. The stator includes: a housing, where the housing has an accommodation space, and an oil inlet is disposed on the housing; a ring-shaped iron core punching sheet, where the iron core punching sheet is disposed in the accommodation space, and abuts against an inner wall of the housing; a spacer sleeve, where the spacer sleeve is sleeved in the iron core punching sheet, an outer surface of the spacer sleeve abuts against a side that is of the tooth part and that faces away from the yoke part, and a slot opening of the stator slot fits with the spacer sleeve to form a third cooling channel; and a flow guiding assembly, where the flow guiding assembly is disposed in the accommodation space. The three-layer oil-injection cooling design can improve a heat dissipation capability of the stator.

IPC Classes  ?

• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 5/15 - Mounting arrangements for bearing-shields or end plates
• H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Abstract

The present application provides a wireless charging device and a wireless charging system, capable of avoiding damage of near-field communication (NFC) circuits. A surface of the wireless charging device serves as a charging surface and allows for placement of at least one electronic device; the at least one electronic device comprises one or two of an NFC circuit or a wireless charging receiving circuit; the wireless charging device comprises a detection coil array; the detection coil array comprises a plurality of detection areas; the plurality of detection areas respectively correspond to a plurality of charging areas of the charging surface; each detection area has the capability of detecting the signal type of a signal sent by the electronic device, so as to detect whether the electronic device on the charging surface comprises an NFC circuit or a wireless charging receiving circuit. Depending on whether the electronic device on the charging surface comprises an NFC circuit or a wireless charging receiving circuit, the wireless charging device can adjust the power of wireless charging for the electronic device, such that damage of the NFC circuit can be avoided.

IPC Classes  ?

• H04B 5/00 - Near-field transmission systems, e.g. inductive loop type
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

A totem-pole PFC circuit, a control method, and a power source apparatus. The control method comprises: when an alternating-current signal provided by a power source input end is within a positive half cycle, a soft-start module (10) transmitting, by means of a first diode and to a capacitor, the alternating-current signal which is within the positive half cycle; and when the alternating-current signal is within a negative half cycle, the soft-start module (10) transmitting, by means of a second diode and to the capacitor, the alternating-current signal which is within the negative half cycle. The first diode and the second diode are both silicon-carbide-based diodes, and the silicon-carbide-based diodes have the characteristics of low loss and no reverse recovery current, such that a reverse recovery current of a totem-pole PFC circuit can be eliminated, thereby reducing loss and increasing the switching frequency. In combination with a soft-start function of the soft-start module (10), the totem-pole PFC circuit can increase the switching frequency while implementing a soft start.

IPC Classes  ?

• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

An energy storage device includes a first cell, a second cell, and an air channel mechanical part. The first cell and the second cell are disposed outside the air channel mechanical part and are sequentially arranged between the air inlet end and the air outlet end, the air channel mechanical part includes a first air channel region and a second air channel region, the first air channel region is disposed correspondingly with the first cell, the second air channel region is disposed correspondingly with the second cell, and a heat dissipation area per unit volume of the second air channel region is greater than a heat dissipation area per unit volume of the first air channel region, to reduce a temperature difference between the second cell and the first cell.

IPC Classes  ?

• H01M 10/6561 - Gases
• H01M 10/613 - Cooling or keeping cold
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

This application discloses a power distribution cabinet which includes a cabinet body, a first air duct assembly, and a second air duct assembly. The first air duct assembly is disposed outside the cabinet body, and the first air duct assembly is disposed on the first side wall of the cabinet body. A projection of the first air duct assembly on the first side wall covers the first air vent and the second air vent. A first circulation space is formed between the first air duct assembly and the first side wall. The first circulation space communicates with an internal space of the cabinet body through the first air vent and the second air vent. The second air duct assembly is disposed inside the cabinet body, and the second air duct assembly forms a second circulation space. The second circulation space communicates with the first air vent.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H05K 5/02 - Casings, cabinets or drawers for electric apparatus - Details

Abstract

The embodiments provide an RSCC and a control method thereof. The RSCC includes an input capacitor, an output capacitor, N parallel RSC branches, and a controller. The controller is configured to: determine an average value of characteristic currents of N resonance units; and reduce a duty cycle of a control signal of a charging switch in a first switch unit when determining that a characteristic current of a first resonance unit is greater than the average value, where a corresponding branch is in a charging stage when the charging switch is turned on; or reduce a duty cycle of a control signal of a discharging switch in a first switch unit when determining that a characteristic current of a first resonance unit is less than the average value, where a corresponding branch is in a discharging stage when the discharging switch is turned on.

IPC Classes  ?

• H02M 3/07 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 7/487 - Neutral point clamped inverters
• H02M 7/493 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel

Abstract

A photovoltaic power generation system and a conversion circuit. Two groups of photovoltaic arrays are cascaded by using the conversion circuit disposed in the photovoltaic power generation system to effectively increase an input voltage of a DC/AC conversion circuit. In this way, a cable with an existing diameter specification can improve current transmission in the photovoltaic power generation system, to effectively reduce costs of the photovoltaic power generation system. A voltage to earth at an intermediate node in the conversion circuit is adjusted to a first preset value, so that both an absolute value of a voltage to earth of a first group of photovoltaic arrays and an absolute value of a voltage to earth of a second group of photovoltaic arrays are less than a first threshold.

IPC Classes  ?

• H02S 40/32 - Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
• H02S 40/34 - Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
• H02S 40/38 - Energy storage means, e.g. batteries, structurally associated with PV modules

Abstract

This application discloses a method, an apparatus, and a system for obtaining electronic layout applied to photovoltaic array in the field of equipment installation management. According to the method, the electronic device identifies each first area in a target picture to obtain position information and a module identifier of at least one photovoltaic module in each first area, and may directly obtain an electronic layout based on the position information and the module identifier of each photovoltaic module. In this way, a product identifier of each converter does not need to be manually obtained, and a photovoltaic module does not need to be manually added to the electronic layout. This reduces labor time consumption and improves efficiency of obtaining the electronic layout.

IPC Classes  ?

• H02S 40/34 - Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
• G06F 30/13 - Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
• G06V 30/422 - Technical drawings; Geographical maps
• H01G 9/20 - Light-sensitive devices
• H01L 31/05 - Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells

Abstract

A power system includes N direct current coupling units, N direct current buses, and a main controller. The main controller is configured to: obtain a total network input demand power (a network input power required by the power grid); obtain first amplitude limiting values (indicate a maximum discharging power that can be supplied by each energy unit to the power grid); and determine first network input power values (a power value allocated to each energy unit and that is input to the power grid, and at least one direct current coupling unit is in a first amplitude limiting state) based on the total network input demand power and the first amplitude limiting values, and the first amplitude limiting state is that a first network input power value of direct current coupling unit is equal to a first amplitude limiting value corresponding to the direct current coupling unit.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers

Abstract

In accordance with an embodiment, an energy storage system includes energy storage container that a temperature control system, a battery cluster, and a controller. The controller determines a specified temperature of the temperature control system corresponding to a maximum difference between an available capacity of the battery cluster and a power consumption of the temperature control system as a target temperature. The determination of the specified temperature is based on: a correspondence between the available capacity of the battery cluster and a plurality of different specified temperatures in a specified temperature set of the temperature control system, and a correspondence between the power consumption of the temperature control system and the plurality of different specified temperatures in the specified temperature set of the temperature control system. The temperature control system is configured to adjust a temperature inside the energy storage container to the target temperature.

IPC Classes  ?

• G05D 23/20 - Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 7/35 - Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells

Abstract

This application discloses a photovoltaic power generation system control method, a photovoltaic power generation system, and a switching apparatus, to reduce a loss of the photovoltaic power generation system. The switching apparatus includes: a switching unit, a detection unit, and a controller. The switching unit includes a first output end, a second output end, a first input end connected to each first DC/DC converter in a one-to-one correspondence, and a second input end connected to each second DC/DC converter in a one-to-one correspondence. The first output end is connected to an input end of a first DC/AC converter, and the second output end is connected to an input end of a second DC/AC converter. The detection unit is separately connected to the first DC/AC converter, the second DC/AC converter, a plurality of first DC/DC converters, and a plurality of second DC/DC converters.

IPC Classes  ?

• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion