Abstract

Provided is a hybrid modular multilevel converter (HMMC) based on a neutral point pilot (NPP) topology and having an ABC N-phase structure. The HMMC includes N pairs of identical upper and lower arms, each upper and lower arm being composed of X submodules and Y sets of switches. The switches within each set are cascaded and connected in series, each of the submodules is formed of full-bridge silicon (Si) insulated-gate bipolar transistor (IGBT) converters, and at least one of the set of switches is formed of IGBTs of opposite polarities.

IPC Classes  ?

• 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 1/00 - 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 7/483 - Converters with outputs that each can have more than two voltage levels

Abstract

Provided is a hybrid modular multilevel converter (HMMC) based on a neutral point clamped (NPC) topology and having an ABC N-phase structure. The HMMC includes N pairs of identical upper and lower arms, each upper and lower arm being composed of X submodules and Y sets of switches. The switches within each set are cascaded and connected in series, each of the submodules is formed of full-bridge silicon (Si) insulated-gate bipolar transistor (IGBT) converters, and at least one of the set of switches is formed of IGBTs of opposite polarities.

IPC Classes  ?

• H02M 7/487 - Neutral point clamped inverters
• 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 7/5387 - 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 7/483 - Converters with outputs that each can have more than two voltage levels

Abstract

An electrical system forming part of a solar power plant is described. The electrical system includes a plurality of photovoltaic (PV) panels, a power converter, and a controller. In response to a detected electric arc on the DC side of the power converter, the controller is configured to enable a short circuit state of the power converter by controlling semiconductor switches of the power converter (e.g., turning on some or all of the semiconductor switches) to create a short circuit between DC input terminals of the power converter. The short circuit path though the power converter will extinguish the detected electric arc in the connected DC circuit.

IPC Classes  ?

• H02H 3/02 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection - Details
• H02H 1/00 - EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS - Details of emergency protective circuit arrangements
• H02H 7/122 - 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 rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters

Abstract

An arrangement is described comprising a pressurised gas system (30) and a cyclorotor (1) located within an annular structure (20). The cyclorotor (1) can be a propulsor for a marine vessel and includes a rotary housing (2) spaced apart from the structure (20) by an annular volume (22), and a plurality of blades (4a, 4c) extending from a surface of the rotary housing (2), each blade having a respective blade axis (6) about which it can be pivoted relative to the rotary housing (2). The pressurised gas system (30) comprises a pressurised gas supply (32), one or more gas outlets (36) in fluid communication with the annular volume (22), and a gas supply unit (34) with a controller (34b) adapted to control the delivery of pressurised gas from the pressurised gas supply (32) into the annular volume (22) through the one or more gas outlets (36).

IPC Classes  ?

• B63H 1/10 - Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction, e.g. paddle wheels with adjustable vanes or blades with cyclic adjustment with blades extending axially from a disc-shaped rotary body

Abstract

A propulsor (1) for a marine vessel is described. The propulsor includes a plurality of blades (4) extending from a rotary housing (2). The blades (4a) are distributed around a blade pitch circle diameter (D1) of the rotary housing. A mounting plate (14) rotatably mounts the rotary housing (2) to a hull (H) of the marine vessel. A slewing bearing (16) includes a driven ring with a driven gear that is fixed to the rotary housing (2) and a stationary ring fixed to the mounting plate (14). A diameter (D2) of the slewing bearing (16) is at least 0.4 times the blade pitch circle diameter (D1). The propulsor (1) includes a main electric motor (28a) with a drive shaft (26a) mechanically connected to a driving gear (24a). The driven gear of the slewing bearing (16) and the driving gear (24a) define a single-stage transmission gear with a transmission ratio between 5:1 and 15:1.

IPC Classes  ?

• B63H 1/10 - Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction, e.g. paddle wheels with adjustable vanes or blades with cyclic adjustment with blades extending axially from a disc-shaped rotary body

Abstract

A cyclorotor (1) is described that can be used as a propulsor for a marine vessel. The cyclorotor (1) includes a rotary housing (2) comprising a main body (18) and a plurality of blade modules (16a, 16b,..., 16f) arranged circumferentially around the main body (18). The cyclorotor (1) also includes a plurality of blade assemblies, each blade assembly being located in a respective blade module (16a, 16b,..., 16f) and having a blade (4a, 4b,..., 4f) extending from the rotary housing (2) with a blade axis about which it can be pivoted relative to the rotary housing. Each blade assembly is associated with a blade actuator comprising an electric motor and having a drive shaft, a driving gear mechanically connected to the drive shaft and a driven gear mechanically connected to the respective blade assembly for pivoting the respective blade (4a, 4b,..., 4f) about its blade axis. Each blade module (16a, 16b,..., 16f) is preferably adapted to be detached and removed from the main body (18).

IPC Classes  ?

• B63H 1/10 - Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction, e.g. paddle wheels with adjustable vanes or blades with cyclic adjustment with blades extending axially from a disc-shaped rotary body

Abstract

A cooling system (1A) for cooling an item of industrial equipment is described. The cooling system (1A) includes a primary circuit (2) around which a cooling fluid is circulated, and which includes a two-phase heat exchanger (10). A secondary circuit (12) is fluidly connected to the primary circuit (2) in parallel with the heat exchanger (10). The secondary circuit (12) includes a condenser (14), a pump (20), a separator and reservoir tank (22) and a restrictor (28). The boiling point of the cooling fluid at the inlet (10A) of the heat exchanger (10) is reduced by the action of the secondary circuit (10), thereby improving the cooling performance of the cooling system (1A).

IPC Classes  ?

• F25B 23/00 - Machines, plants or systems, with a single mode of operation not covered by groups , e.g. using selective radiation effect
• F25B 25/00 - Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups
• F25D 17/02 - Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine

Abstract

A power converter system is described. The power converter system includes a power converter comprising at least one converter unit, each converter unit comprising a plurality of semiconductor devices, each semiconductor device including at least a controllable semiconductor switch. A local controller is associated with at least one converter unit and adapted to receive CD and MD from a main controller. In response to a detected fault condition of the power converter system, the local controller is adapted to use at least one of the one or more locally-stored values to determine an operating state of the power converter system, and to use the determined operating state to select a fault operating procedure to control each associated converter unit according to the selected fault operating procedure without using any CD from the main controller.

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 7/539 - 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

Abstract

A power conversion system for mobile power generation and support is configured to be adaptable to different, time-varying mission requirements, system statuses, environmental contexts, and for different power sources and power loads. Adaptability includes real-time, on-the-fly adaptation from DC-to-AC, AC-to-DC, AC-to-AC, and DC-to-DC conversion; adaptations from buck conversion to boost conversation; and from current source conversion mode to voltage source conversion mode. In an embodiment, individual internal power stages for one or more power electronics building blocks are equipped with multiple internal current routing switches/contactors. Current flow may be dynamically re-routed along different current paths associated with an H-bridge of each power stage. Alternative current routings allow for the introduction or removal of inductors at critical points along the current path. Such on-the-fly current rerouting, at the power transistor level, enables the adaptability of the power converter. Specific open/closed switch settings and specific current routing configurations are presented.

IPC Classes  ?

• 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
• H02M 7/25 - 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 arranged for operation in series, e.g. for multiplication of voltage
• 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

A compaction plate for magnetic mass is proposed. The compaction plate comprises a plurality of laminated magnetic sheets, the laminated magnetic sheets being fixed together with fixing and electric insulating means.

IPC Classes  ?

• H02K 1/16 - Stator cores with slots for windings
• H02K 1/26 - Rotor cores with slots for windings
• H02K 11/33 - Drive circuits, e.g. power electronics

Abstract

A doubly-fed induction generator (DFIG) system (100) is described. The DFIG system (100) includes an induction electric machine (102) including a stator having a stator winding and a rotor having a rotor winding. The stator winding is electrically connected to at least one output terminal (108) and the rotor winding is electrically connected to the at least one output terminal (108) by means of a power converter. The power converter includes a first active rectifier/inverter (130a) with alternating current AC terminals electrically connected to the rotor winding, and direct current DC terminals, and a second active rectifier/inverter (136a) with DC terminals electrically connected to the DC terminals of the first active rectifier/inverter by a DC link (138a), and AC terminals electrically connected to the at least one output terminal (108). A controller is adapted to control the first active rectifier/inverter (130a) so that the frequency of the AC current at its AC terminals is substantially constant during at least one of a “line charging mode” and an “islanded mode”.

IPC Classes  ?

• H02P 9/00 - Arrangements for controlling electric generators for the purpose of obtaining a desired output
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 1/16 - Stator cores with slots for windings

Abstract

A power converter system is described. The system includes a power converter with a first converter including a plurality of semiconductor devices. Each semiconductor device includes at least a controllable semiconductor switch having a threshold voltage and a gate voltage for normal on-state conduction. The first converter has first and second DC terminals connected to a DC circuit, and a plurality of AC terminals. A controller is configured to supply current to the first converter (e.g., from an AC power source) and enable a short circuit state of the first converter by controlling semiconductor switches of the first converter to create at least one short circuit path through the first converter that carries the supplied current. At least one of the semiconductor switches in at least one of the short circuit paths is operated with modified on-state conduction in order to increase conduction losses. A gate driver applies to the semiconductor switch a modified gate voltage that is less than the gate voltage for normal on-state conduction.

IPC Classes  ?

• H02M 1/36 - Means for starting or stopping converters
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• 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 5/458 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A testing process for an electrical system is described. The electrical system includes a power converter (2) and a direct current (DC) bus (12) with two or more DC bus terminals (14a, 14b, 14c), and at least one DC bus capacitor (16a, 16b). The testing process is a fully automated testing process where a sequence of different diagnostic tests are carried out on the electrical system, each diagnostic test testing one of the power converter (2) and the DC bus (12) to determine if it is responding as expected or operating within normal parameters.

IPC Classes  ?

• G01R 31/42 - AC power supplies
• H02M 1/36 - Means for starting or stopping converters
• 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
• G01R 31/34 - Testing dynamo-electric machines

Abstract

The rotor with a non-through shaft for a rotary electric machine comprises a cylindrical magnetic body clamped between two half-shafts, each comprising an attachment flange connected to the magnetic body, axial housings being uniformly provided in the magnetic body on at least one diameter of the magnetic body in order to house conductive bars. At least one attachment flange comprises insertion holes, each arranged facing a housing for inserting the conductive bars into the housings and the exterior diameter of the attachment flange is substantially equal to the exterior diameter of the magnetic body, the attachment flange comprising as many insertion holes as housings.

IPC Classes  ?

• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

The conductor bar (17) for a squirrel-cage rotor comprises at least one end (17a) which is partially slit such that a section of the end forms two symmetrical branches (22, 23) relative to the slit (21). The centre of gravity (G3, G4) of each branch is arranged such that the branches flare towards the outside of the bar under the effect of centrifugal force when the rotor is rotated.

IPC Classes  ?

• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

This electrical protection system for a DC-current medium-voltage electrical circuit, comprising a disconnection module, for generating a counter-voltage greater than the voltage of the source for a current flowing therethrough that is equal to at most a few percent of the nominal current of the device, a resistive limitation module connected between a first terminal and a second terminal and configured so as to reduce the intensity of the output current of the protection system in order to limit the current between a value and upon a low impedance fault downstream of the device, and a primary switching module coupled in parallel across the disconnection module and the resistive module. The primary switching module is configured so as to switch between a first state in which the primary switching module is conductive and a second state in which the primary switching module forms a short circuit. Control means for controlling the primary switching module are configured so as to switch the primary switching module as soon as the current flowing in the first terminal reaches an upper limit value as lower value or a lower limit as upper value.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
• H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle

Abstract

The rotor (4) for a squirrel-cage asynchronous rotating electrical machine comprises two compaction elements (6) clamping a cylindrical magnetic mass (7), short-circuit disks (8) inserted between the magnetic mass and the compaction elements, and conductive bars (9) housed in housings (10) of the magnetic mass and evenly distributed over at least one diameter of the magnetic mass, so that the short-circuit disks and the conductive bars form a squirrel-cage, at least one of the compaction elements and the short-circuit disks comprising insertion holes (Sa, 12) each disposed facing a housing. Retention means are inserted into each insertion hole to retain the conductive bars in the housings.

IPC Classes  ?

• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
• H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines

Abstract

and the test subsystem for applying a force on the pod to simulate full scale external loading. The test subsystem comprises a pod actuator interface, an actuator, and an actuator structure interface.

IPC Classes  ?

• G01M 13/025 - Test-benches with rotational drive means and loading means; Load or drive simulation
• G01L 5/00 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes

Abstract

A method of controlling of a polyphase power converter driven by an algorithm of the pulse width modulation type, in which a control parameter comprising a drive setpoint value or a pulse duration associated with a value of drive setpoint of at least one phase, situated in a non-linearity zone of a chart, is modified by modifying the value of said parameter so that it is in a linearity zone of the chart. The control parameter of each of the phases is modified in the same manner.

IPC Classes  ?

• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 27/16 - 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 ac to ac converters without intermediate conversion to dc
• H02M 1/084 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system

Abstract

This mechanical system for rotating electric machine comprises at least one rotor and at least one transmission shaft for mechanical device. The rotor has a non-through shaft and comprises a cylindrical magnetic block enclosed between a first and a second raised compaction elements forming a rotor shaft, with one end of the transmission shaft being connected directly to the first compaction element.

IPC Classes  ?

• F02C 7/36 - Power transmission between the different shafts of the gas-turbine plant, or between the gas-turbine plant and the power user
• H02K 1/27 - Rotor cores with permanent magnets
• 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

The rotor for an electrical machine with a non-through shaft intended to drive a transmission line comprises two half-shafts enclosing a cylindrical magnetic mass. The rotor for an electrical machine with a non-through shaft intended to drive a transmission line comprises two half-shafts enclosing a cylindrical magnetic mass. The magnetic mass comprises at least two adjacent identical cells, the cells being configured to prevent the propagation of metadamping in the rotor over a range of excitation frequencies of the transmission line, the rotation frequency range of the transmission line being hypercritical.

IPC Classes  ?

• H02K 1/30 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
• F04B 35/04 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
• H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

A ring for shaft bearing of a marine vehicle drive unit has an annular body and a cylindrical active part intended to provide a sliding contact function with another ring at the bearing level. The cylindrical part is segmented into several cylindrical surfaces, each cylindrical surface being attached in a removable manner to the annular body.

IPC Classes  ?

• F16C 43/04 - Assembling rolling contact bearings
• F16C 19/16 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
• F16C 33/58 - Raceways; Race rings

Abstract

A method of short-circuiting a faulty submodule for a voltage-source power converter is disclosed. The submodule is based on a full-bridge, asymmetric full-bridge or half-bridge circuit design having power semiconductor switches with anti-parallel freewheeling diodes and optionally non-controllable semiconductor valves. The method 36 includes identifying a faulty semiconductor device and determining a failure mode selected from a short-circuit failure mode and an open circuit failure mode. The method further includes selecting a minimum number of power semiconductor switches suitable to provide a bypass path through the submodule depending on the identified faulty semiconductor device and the determined failure mode and driving the selected power semiconductor switches by a modified driving voltage compared to normal operation to cause them to break down in order to provide a durable, stable, low impedance short-circuit path between the AC voltage terminals of the submodule. A power converter comprising a series connection of such submodules and supporting the method of short-circuiting a faulty submodule is also disclosed.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02H 7/12 - 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 rectifiers for static converters or rectifiers
• H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
• 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
• H02M 7/483 - Converters with outputs that each can have more than two voltage levels
• 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

The stator for rotary electric machine comprises a stator frame and a cylindrical magnetic mass inserted in the stator frame, the magnetic mass including a plurality of stacks of compacted magnetic sheets and longitudinal channels uniformly distributed over at least one diameter of the magnetic mass, the channels leading to each side of the magnetic mass. The stator for rotary electric machine comprises a stator frame and a cylindrical magnetic mass inserted in the stator frame, the magnetic mass including a plurality of stacks of compacted magnetic sheets and longitudinal channels uniformly distributed over at least one diameter of the magnetic mass, the channels leading to each side of the magnetic mass. At least three bundles of compacted magnetic sheets are separated by spacers forming two discharge pipes extending circumferentially and radially between the stator frame and a central housing of the rotary electric machine and communicating with the channels, the stator frame comprising at least two discharge openings connected to different pipes such that a fluid injected on either side of the magnetic mass escapes from the stator via the discharge pipes, the fluid passage section of the discharge pipes being configured to modify the temperature distribution in the magnetic mass.

IPC Classes  ?

• H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium

Abstract

The rotor for a squirrel-cage asynchronous rotating electrical machine comprises two compaction elements clamping a cylindrical magnetic mass, short-circuit rings facing the face of the compaction elements opposite that in contact with the magnetic mass, and conductive bars housed in recesses in the magnetic mass and distributed evenly over at least one diameter of the magnetic mass such that the short-circuit rings and the conductive bars form a squirrel cage. The rotor for a squirrel-cage asynchronous rotating electrical machine comprises two compaction elements clamping a cylindrical magnetic mass, short-circuit rings facing the face of the compaction elements opposite that in contact with the magnetic mass, and conductive bars housed in recesses in the magnetic mass and distributed evenly over at least one diameter of the magnetic mass such that the short-circuit rings and the conductive bars form a squirrel cage. Retaining means distributed over at least one diameter of each short-circuit ring and over at least one diameter of each compaction element interact so as to secure the short-circuit rings and the compaction elements together, the pitch circle diameters of the retaining means on the rings and the compaction elements being smaller than the pitch circle diameter of the conductive bars.

IPC Classes  ?

• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines

Abstract

Provided is a control system (300) for a PV array system (100) including a plurality of PV panels (110, 210). The control system (300) includes a bypass module (250) having a first switch device (260, 310) and a second switch device (262, 312) disposed at least one PV panel (110, 210) connected with others of the plurality of PV panels (110, 210) along a string (200), and configured to perform a switching operation when PV voltage at the at least one PV panel (110, 210) is outside of an acceptable voltage range of the PV array system (100), and the bypass module (250) short-circuits the PV panel (110, 210) when excess voltage at the PV panel (110, 210) is detected. The control system (300) also including a control module (305) configured to monitor and control operation of the bypass module (250).

IPC Classes  ?

• H01L 31/05 - Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
• H01L 31/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof
• H01L 31/04 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof adapted as photovoltaic [PV] conversion devices
• H01L 31/042 - PV modules or arrays of single PV cells

Abstract

A doubly-fed induction generator (DFIG) system (100) is described. The DFIG system (100) includes an induction electric machine (102) including a stator having a stator winding and a rotor having a rotor winding. The stator winding is electrically connected to at least one output terminal (108) and the rotor winding is electrically connected to the at least one output terminal (108) by means of a power converter. The power converter includes a first active rectifier/inverter (130a) with alternating current AC terminals electrically connected to the rotor winding, and direct current DC terminals, and a second active rectifier/inverter (136a) with DC terminals electrically connected to the DC terminals of the first active rectifier/inverter by a DC link (138a), and AC terminals electrically connected to the at least one output terminal (108). A controller is adapted to control the first active rectifier/inverter (130a) so that the frequency of the AC current at its AC terminals is substantially constant during at least one of a "line charging mode" and an "islanded mode".

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02P 9/00 - Arrangements for controlling electric generators for the purpose of obtaining a desired output
• H02P 21/00 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation

Abstract

A modular multipoint power converter for converting an AC voltage to a DC voltage or vice versa, and a method of operating it are provided. The multipoint power converter has a converter branches, whereby two converter branches are connected to each other respectively to form a phase branch of the converter. Each converter branch has a plurality of similar submodules, each of which is formed from a half-bridge circuit with power semiconductor switches. The branch currents through the converter branches are controlled in operation by increasing the DC component of the DC current or the DC intermediate circular current such that a unipolar current flows through the converter branches. As a result, with the same plurality of submodules per converter branch, the transmissible power can be increased, the power semi-conductor elements can be better utilized, or the plurality of submodules can be reduced while the transmissible power remains the same.

IPC Classes  ?

• H02M 7/483 - Converters with outputs that each can have more than two voltage levels
• H02M 7/797 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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

An active flux control method is described. The active flux control method injects a DC current component into an output transformer (10) that is connected to a power converter in order to reduce the saturation of the output transformer during a network fault. The method includes using a flux controller (20) to derive an estimated magnetisation curve of the output transformer using a closed-loop estimator comprising a flux model (21) and a modelled magnetisation flux (22). A DC component of the estimated magnetisation flux is calculated. Current control is carried out using a current controller (30) that controls the power converter to inject a DC current component into the output transformer. The DC current component is calculated from the DC component of the estimated magnetisation flux.

IPC Classes  ?

• H02M 3/28 - 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
• H02M 1/40 - Means for preventing magnetic saturation
• 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

A power converter system (1A) is described. The system includes a power converter (2) with a first converter (2b) including a plurality of semiconductor devices. Each semiconductor device includes at least a controllable semiconductor switch having a threshold voltage and a gate voltage for normal on-state conduction. The first converter (2b) has first and second DC terminals connected to a DC circuit (22), and a plurality of AC terminals. A controller is configured to supply current to the first converter (2b) (e.g., from an AC power source (24)) and enable a short circuit state of the first converter by controlling semiconductor switches of the first converter to create at least one short circuit path through the first converter that carries the supplied current. At least one of the semiconductor switches in at least one of the short circuit paths is operated with modified on-state conduction in order to increase conduction losses. A gate driver applies to the semiconductor switch a modified gate voltage that is less than the gate voltage for normal on-state conduction.

IPC Classes  ?

• H02M 1/36 - Means for starting or stopping converters
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 5/458 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
• 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 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
• 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

Provided is an energy storage system for a marine vessel. The energy storage system includes a battery pack and a storage container (i) configured for housing the battery pack and other components and (ii) including an electrical interface for electrically coupling the battery pack to the vessel. The energy storage system also includes an air blast cooling system (i) mountable to a first section of the container and (ii) for cooling the battery pack and an air conditioning system configured for cooling the other components.

IPC Classes  ?

• H01M 10/625 - Vehicles
• H01M 10/613 - Cooling or keeping cold
• H01M 10/6561 - Gases
• H01M 10/663 - Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
• H01M 10/6567 - Liquids
• B63J 99/00 - Subject matter not provided for in other groups of this subclass
• B63H 21/38 - Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
• H01M 50/20 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders

Abstract

This electrical protection system (1) for a DC-current medium-voltage electrical circuit, comprising a disconnection module (11), for generating a counter-voltage greater than the voltage of the source for a current flowing therethrough that is equal to at most a few percent of the nominal current of the device, a resistive limitation module (8) connected between a first terminal (B1) and a second terminal (B2) and configured so as to reduce the intensity of the output current of the protection system (1) in order to limit the current between a value VB and VH upon a low-impedance fault downstream of the device, and a primary switching module (5) coupled in parallel across the disconnection module (11) and the resistive module (8). The primary switching module (5) is configured so as to switch between a first state in which the primary switching module is conductive and a second state in which the primary switching module forms a short circuit. Control means (6) for controlling the primary switching module (5) are configured so as to switch the primary switching module (5) as soon as the current flowing in the first terminal (B1) reaches an upper limit value as lower value or a lower limit as upper value.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle

Abstract

The mechanical drive system comprises a frame, at least one rotating electric machine comprising an end shaft rotor arranged on the frame, and at least one transfer case having at least one driving gear wheel. The driving gear wheel is integral with a rotor shaft of the rotating electric machine, the transfer case being arranged on the frame.

IPC Classes  ?

• H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
• F04C 23/02 - Pumps characterised by combination with, or adaptation to, specific driving engines or motors
• 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
• F04B 35/04 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
• F16H 57/02 - Gearboxes; Mounting gearing therein

Abstract

The invention relates to a mechanical drive system (20) comprising a frame (21), at least one rotating electrical machine (22) having a rotor with a non-through shaft (25) disposed on the frame, and at least one transfer box (23) comprising at least one driving gearwheel (37). The driving gearwheel is secured to a rotor shaft of the rotating electrical machine, the transfer box being disposed on the frame.

IPC Classes  ?

• F16H 1/22 - Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with arrangements for dividing torque between two or more intermediate shafts
• H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
• F16H 57/02 - Gearboxes; Mounting gearing therein

Abstract

The rotor (18) with a non-through shaft for a rotary electric machine comprises a cylindrical magnetic body (19) clamped between two half-shafts (20), each comprising an attachment flange (21) connected to the magnetic body, axial housings (22) being uniformly provided in the magnetic body on at least one diameter (D22) of the magnetic body in order to house conductive bars (25). At least one attachment flange comprises insertion holes (23), each arranged facing a housing for inserting the conductive bars into the housings and the exterior diameter (D21) of the attachment flange is substantially equal to the exterior diameter (D19) of the magnetic body, the attachment flange comprising as many insertion holes (23) as housings.

IPC Classes  ?

• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
• 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

The conductor bar (17) for a squirrel-cage rotor comprises at least one end (17a) which is partially slit such that a section of the end forms two symmetrical branches (22, 23) relative to the slit (21). The centre of gravity (G3, G4) of each branch is arranged such that the branches flare towards the outside of the bar under the effect of centrifugal force when the rotor is rotated.

IPC Classes  ?

• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

The rotor (4) for a squirrel-cage asynchronous rotating electrical machine comprises two compaction elements (6) clamping a cylindrical magnetic mass (7), short-circuit disks (8) inserted between the magnetic mass and the compaction elements, and conductive bars (9) housed in housings (10) of the magnetic mass and evenly distributed over at least one diameter of the magnetic mass, so that the short-circuit disks and the conductive bars form a squirrel-cage, at least one of the compaction elements and the short-circuit disks comprising insertion holes (8a, 12) each disposed facing a housing. Retention means are inserted into each insertion hole to retain the conductive bars in the housings.

IPC Classes  ?

• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

An inverter system is described. The inverter system includes a DC power source such as a plurality of photovoltaic (PV) panels, an inverter and a controller. The inverter includes a plurality of semiconductor devices (e.g., controllable semiconductor switches such as IGBTs and anti-parallel connected diodes) arranged in a suitable inverter topology. The inverter includes DC input terminals connected to the PV panels by means of a DC link and at least one AC output terminal. When starting the inverter, the controller is configured to enable a short circuit state of the inverter by controlling the semiconductor switches to create a short circuit between the DC input terminals such that the inverter carries a current substantially equal to the short circuit current of the PV panels. This short circuit current may be used to pre-heat the semiconductor devices of the inverter to reduce failure rates caused by cosmic radiation when the semiconductor devices subsequently experience high blocking voltages during normal operation of the inverter.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• 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 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/36 - Means for starting or stopping converters
• H02M 7/487 - Neutral point clamped inverters

Abstract

A system for use with an electric machine is provided. The system includes a processor and a memory comprising a set of memory modules, which, when executed by the processor, cause the processor to perform certain operations. The operations include receiving operational data from the electric machine, and generating, based on the operational data, a first set of diagnostic data, by executing a first memory module from the set of memory modules. The operations further include generating, based on the operational data, a second set of diagnostic data, by executing a second memory module from the set of memory modules, the second memory module including a set of parameters associated with a diagnostics model of the electric machine. Furthermore, the operations include effecting, based on the operational data, the first set of diagnostic data, and the second set of diagnostic data, a change in at least one parameter.

IPC Classes  ?

• G01R 31/56 - Testing of electric apparatus
• G05B 23/02 - Electric testing or monitoring
• G06F 1/28 - Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
• G01R 31/50 - Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
• G06N 3/02 - Neural networks
• G06N 20/20 - Ensemble learning
• G06N 20/00 - Machine learning
• G06N 20/10 - Machine learning using kernel methods, e.g. support vector machines [SVM]

Abstract

An electrical system forming part of a solar power plant (1) is described. The electrical system includes a plurality of photovoltaic (PV) panels (8), a power converter (2), and a controller (54). In response to a detected electric arc on the DC side of the power converter (2), the controller (54) is configured to enable a short circuit state of the power converter by controlling semiconductor switches of the power converter (e.g., turning on some or all of the semiconductor switches) to create a short circuit between DC input terminals (4) of the power converter. The short circuit path though the power converter (2) will extinguish the detected electric arc in the connected DC circuit (10).

IPC Classes  ?

• H02H 1/00 - EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS - Details of emergency protective circuit arrangements
• H02H 3/02 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection - Details
• H02H 7/122 - 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 rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters

Abstract

An inverter system (1) is described. The inverter system (1) includes a DC power source such as a plurality of photovoltaic (PV) panels (8), an inverter (2) and a controller (32). The inverter (2) includes a plurality of semiconductor devices (e.g., controllable semiconductor switches such as IGBTs and anti-parallel connected diodes) arranged in a suitable inverter topology. The inverter (2) includes DC input terminals (4) connected to the PV panels (8) by means of a DC link (10) and at least one AC output terminal (6). When starting the inverter (2), the controller (32) is configured to enable a short circuit state of the inverter (2) by controlling the semiconductor switches to create a short circuit between the DC input terminals (4) such that the inverter (2) carries a current substantially equal to the short circuit current of the PV panels (8). This short circuit current may be used to pre-heat the semiconductor devices of the inverter (2) to reduce failure rates caused by cosmic radiation when the semiconductor devices subsequently experience high blocking voltages during normal operation of the inverter.

IPC Classes  ?

• H02M 7/537 - 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
• 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 7/487 - Neutral point clamped inverters
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/36 - Means for starting or stopping converters
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/40 - Synchronising a generator for connection to a network or to another generator

Abstract

Method of control of a polyphase power converter driven by an algorithm of the pulse width modulation type, in which a control parameter comprising a drive setpoint value or a pulse duration associated with a value of drive setpoint of at least one phase, situated in a non-linearity zone of a chart, is modified (42, 45, 46) by modifying the value of said parameter so that it is in a linearity zone of the chart. The control parameter of each of the phases is modified in the same manner.

IPC Classes  ?

• 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
• 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
• 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

Abstract

Method of control of a polyphase power converter driven by an algorithm of the pulse width modulation type, in which a control parameter comprising a drive setpoint value or a pulse duration associated with a value of drive setpoint of at least one phase, situated in a non-linearity zone of a chart, is modified (42, 45, 46) by modifying the value of said parameter so that it is in a linearity zone of the chart. The control parameter of each of the phases is modified in the same manner.

IPC Classes  ?

• 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
• 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
• 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

Provided is a rotor for an asynchronous rotary electrical machine with non-through shaft that includes a cylindrical magnetic mass gripped between two mounting flanges of two half-shafts, a cooling means capable of cooling the rotor and conductive bars housed within the magnetic mass and distributed substantially uniformly over a diameter of the magnetic mass. The cooling means includes, for each conductive bar, at least one cooling channel, opening onto the conductive bar according to an axial direction and located within the magnetic mass and at least one through hole arranged within each conductive bar in such a way that the cooling channel communicates with at least one hole arranged on the outer periphery of the magnetic mass.

IPC Classes  ?

• 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
• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
• H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
• H02K 9/00 - Arrangements for cooling or ventilating

Abstract

The squirrel-cage rotor (12) for an asynchronous rotating electrical machine comprises two compaction elements (15) clasping a cylindrical magnetic mass (14), short-circuit crowns (16) facing that face of the compaction elements opposite the one in contact with the magnetic mass, and conductive bars (17) housed in recesses in the magnetic mass and distributed uniformly over at least one diameter of the magnetic mass such that the short-circuit crowns and the conductive bars form a squirrel cage. Holding means (19, 20, 21) distributed over at least one diameter of each short-circuit crown and over at least one diameter of each compaction element interact so as to hold the short-circuit crowns and the compaction elements together, the installation diameters of the holding means on the crowns and the compaction elements being smaller than the installation diameter of the conductive bars.

IPC Classes  ?

• H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
• H02K 5/24 - Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures

Abstract

Provided is a rotor for an asynchronous electrical machine having an end shaft that includes two half-shafts pressing against a cylindrical magnetic block and two short-circuit discs each placed between one different half-shaft and one of the ends of the cylindrical magnetic block. Each half-shaft includes at least one first means of retention, and each short-circuit disc includes on each of its faces at least one second means of retention and each end of the magnetic block includes at least one third means of retention, the first, second, and third means of retention mating with one another in such a way as to prevent the short-circuit discs from moving relative to the half-shafts and relative to the magnetic block.

IPC Classes  ?

• H02K 1/30 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

The magnetic sheet for rotor with a non-through shaft with no recess at the center thereof is intended to be inserted between two half-shafts of the rotor. It comprises at least one locking means intended to cooperate with adjacent elements so as to prevent a relative movement of said sheet relative to the adjacent elements.

IPC Classes  ?

• H02K 1/30 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
• H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies

Abstract

Provided is a rotor for an asynchronous rotating electrical machine that includes a cylindrical magnetic mass, two short-circuit disks, a non-through shaft that includes two half-shafts tightly holding the cylindrical magnetic mass and the two short-circuit disks each sandwiched between the half-shafts and one of the ends of the magnetic mass, and conducting bars housed inside the magnetic mass and distributed uniformly along at least one diameter of the magnetic mass such that the short-circuit disks and the conducting bars form a squirrel cage, and the half-shafts, the short-circuit disks and the magnetic mass form a gas-tight envelope.

IPC Classes  ?

• H02K 1/30 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

The rotor with a non-through shaft for an electrical machine comprises a cylindrical magnetic mass gripped between two half-shafts each comprising a mounting flange connected to the magnetic mass. The rotor with a non-through shaft for an electrical machine comprises a cylindrical magnetic mass gripped between two half-shafts each comprising a mounting flange connected to the magnetic mass. Each half-shaft is made in a single piece and comprises a coupling flange located opposite the mounting flange.

IPC Classes  ?

• H02K 1/30 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
• H02K 16/02 - Machines with one stator and two rotors

Abstract

Electrical power distribution system for supplying a set of fixed-frequency loads and a set of variable-frequency loads, includes a set of at least one fixed-frequency AC voltage generator and a set of at least one variable-frequency AC voltage generator, a DC distribution network supplying the variable-frequency loads by means of inverter stages, a first set of rectifier stages connected between the fixed-frequency generators and the distribution network, and a second set of rectifier stages connected between the variable-frequency generators and the DC distribution network. The first set of rectifier stages includes bidirectional rectifiers capable of providing a bidirectional transfer of power and protection means against fault currents connected between the bidirectional rectifiers and the distribution network.

IPC Classes  ?

• H02J 4/00 - Circuit arrangements for mains or distribution networks not specified as ac or dc
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• H02J 5/00 - Circuit arrangements for transfer of electric power between ac networks and dc networks

Abstract

An electrical energy storage module is provided. The storage module includes a reversible electrical energy conversion device intended to be connected to an electrical energy source and an electrical energy storage device. The storage device includes a first branch including two filter capacitors in series, and a second branch including two identical electrical energy storage means connected in series. A node common to the two capacitors and a node common to the two energy storage means are coupled by an impedance. A first end of the first and second branches is connected to the electrical energy conversion device, and a second end of the first and second branches is connected to the electrical energy conversion device.

IPC Classes  ?

• H01M 10/44 - Methods for charging or discharging
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02M 7/539 - 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

Abstract

An earthing switch circuit is provided and is connected to a direct current (DC) link including a positive terminal and a negative terminal having capacitance or energy storage capability. The earthing switch circuit includes a dynamic braking circuit having a single or plurality of dynamic braking (DB) switches, and at least one dynamic braking (DB) resistor disposed between the plurality of DB switches, and an earthing switch connected between the DB circuit and ground. The at least one DB resistor dissipates energy thermally when performing a dynamic braking operation and simultaneously decreases in-rush current for the earthing switch circuit upon closure of the earthing switch.

IPC Classes  ?

• H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
• 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
• H01H 31/00 - Air-break switches for high tension without arc-extinguishing or arc-preventing means
• H02B 13/075 - Earthing arrangements

Abstract

Provided is a method for performing AC optimal yield control within an inverter that includes a plurality of DC power sources configured to supply DC power, a plurality of converters to convert direct current power to alternating current power to be supplied to a load, a plurality of short-circuit protection devices connected to a DC interconnection bus at the DC power sources, and configured to provide short-circuit protection, a plurality of current sensors configured to sense circulation current at the short-circuit protection devices, and a controller. The controller controls the converters and monitors the circulation current sensed along the DC interconnection bus via the current sensors, and when power reduction occurs at one of the DC power sources, performs a closed-loop control current operation to controllably increase the circulation current along the DC interconnection bus to be greater than an impairment lower limit of the short-circuit protection devices.

IPC Classes  ?

• H02J 1/10 - Parallel operation of dc sources
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02H 7/122 - 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 rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
• H02H 1/00 - EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS - Details of emergency protective circuit arrangements

Abstract

c).

IPC Classes  ?

• H02K 11/00 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
• H02K 3/51 - Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only
• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

The hollow rotor shaft for a rotating electrical machine includes two parts. A first part includes a first hollow cylindrical element and a second part includes a second hollow cylindrical element, whereby sections of a first end of the first and second elements are in contact and secured by securing means.

IPC Classes  ?

• 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 19/38 - Structural association of synchronous generators with exciting machines
• F16C 3/02 - Shafts; Axles
• H02K 11/042 - Rectifiers associated with rotating parts, e.g. rotor cores or rotary shafts

Abstract

A subsea assembly comprising an electric subsea machine having an electric motor driving an operator, and a coolant circuit at least partially located in thermal contact with the electric motor, the coolant circuit including a cooling assembly located externally from the subsea machine, the cooling assembly comprising at least a heat transfer element, the subsea machine and the cooling assembly being supported by a common supporting frame; at least a part of the heat transfer element is integrated in the frame.

IPC Classes  ?

• H02K 1/12 - Stationary parts of the magnetic circuit
• H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures

Abstract

A magnetic circuit for a rotary electric machine, a method and an associated electrical machine are described. The magnetic circuit includes an element comprising a plurality of stacks of compacted sheets disposed in an axial direction and clamped between two clamping plates connected by removable retaining bars, where at least one clamping plate includes as many openings as removable retaining bars. The openings of the at least one clamping late and at least one end of each retaining bar are configured to cooperate so that the end of each retaining bar engages a rim of the opening.

IPC Classes  ?

• H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
• H02K 1/06 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the shape, form or construction
• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• H02K 1/30 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders

Abstract

An operating circuit and a method for operating a synchronous machine on a voltage supply network is disclosed. The operating circuit has a converter circuit with controllable converter switches and a controllable switching arrangement to switch the converter circuit between a start converter configuration and a direct converter configuration. The power supply network is connected to a converter output and the synchronous machine is connected to a converter input of the converter circuit. In the direct converter configuration, an AC voltage is provided at the converter output with a preset AC voltage frequency. In the direct converter configuration, the switching of the AC voltage between the converter input and the converter output takes place without intermediate rectification.

IPC Classes  ?

• H02M 5/45 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
• H02M 1/36 - Means for starting or stopping converters
• H02P 1/52 - Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor by progressive increase of frequency of supply to motor
• H02P 9/08 - Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation
• H02M 5/452 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform
• H02M 5/27 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means for conversion of frequency
• H02P 27/16 - 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 ac to ac converters without intermediate conversion to dc
• H02P 9/48 - Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle

Abstract

There are provided methods and apparatuses for authenticating components in an electric machine. For example, there is provided a method for authenticating parts of an electric machine. The method includes fetching, using a controller, identification data associated with a set of parts and performing a first verification step on the identification data, for each part in the set. The method further includes performing a second verification step on the identification data, in response to the first verification step being successful. The second verification step includes comparing the identification data with data from a database that includes identification information associated with manufactured parts. Furthermore, the method includes, in response to one of the first verification step and the second verification step being unsuccessful, a command to disable the electric machine.

IPC Classes  ?

• G06F 21/31 - User authentication
• G06F 21/36 - User authentication by graphic or iconic representation
• G06F 21/44 - Program or device authentication
• G06F 21/75 - Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by inhibiting the analysis of circuitry or operation, e.g. to counteract reverse engineering
• G06F 21/73 - Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by creating or determining hardware identification, e.g. serial numbers
• G06F 21/62 - Protecting access to data via a platform, e.g. using keys or access control rules

Abstract

A method of controlling a power system that includes an electrical machine, e.g., wind turbine generator, a power converter, a DC circuit and a dynamic braking system (DBS) having a braking circuit having a braking resistor and being connected in series to the DC circuit, is provided. The method includes operating the DBS and controlling operation of the electrical machine based on a prevailing temperature of the braking circuit, stopping the electrical machine and controlling the electrical machine to be restarted at its rated output power once the prevailing temperature of the braking resistor reaches or falls below a lower temperature threshold. The electrical machine may be restarted at a lower output power and after restarting, its output power can be increased based on a power starting profile as the braking resistor cools.

IPC Classes  ?

• H02P 9/08 - Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation
• H02P 9/00 - Arrangements for controlling electric generators for the purpose of obtaining a desired output
• H02P 3/22 - Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor by short-circuit or resistive braking
• F03D 7/02 - Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
• H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
• H02M 7/04 - Conversion of ac power input into dc power output without possibility of reversal by static converters
• H02P 9/02 - Arrangements for controlling electric generators for the purpose of obtaining a desired output - Details
• H02P 101/15 - Special adaptation of control arrangements for generators for wind-driven turbines

Abstract

A method and a device for controlling a commutation process of a load current between two switching modules are disclosed that each have a MOSFET that can be controlled by a gate-source voltage, and an intrinsic-body inverse diode. To reduce oscillations in the down-commutation of the inverse diodes caused by parasitic circuit parameters, after switching off one of the switching modules, the gate-source control voltage applied to this switching module is temporarily switched off until being increased again the vicinity of the threshold voltage for switching on the MOSFET, before and while the other switching module is switched on, in order to commutate the current from the inverse diode of the one switching module to the MOSFET of the other switching module.

IPC Classes  ?

• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H03K 17/16 - Modifications for eliminating interference voltages or currents
• H02M 7/538 - 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 push-pull configuration
• H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• H03K 17/687 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being field-effect transistors
• 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

The disclosed assembly (E) comprises a housing (4) and a stator (29) inserted inside a cylindrical cavity in said housing (4). Said assembly comprises a means for point-to-point attachment (40, 46) of the stator (29) to the housing (4).

IPC Classes  ?

• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• H02K 5/04 - Casings or enclosures characterised by the shape, form or construction thereof
• H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies

Abstract

This power system for mounting on a marine vehicle includes a propulsion unit, means for securing the propulsion assembly to a hull element of the vehicle and a rudder bearing mechanically connecting the propulsion unit with the fittings. The fittings are configured so that once the power system is mounted on the hull element; the plane of the rudder bearing is inclined relative to a plane containing one longitudinal axis and one transverse axis of the marine vehicle.

IPC Classes  ?

• B63H 5/125 - Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction
• F16C 19/10 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
• F16C 19/30 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for axial load mainly
• F16C 35/04 - Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings

Abstract

There is provided a system that includes a processor. The system also includes a memory that stores instructions; when executed by the processor, the instructions configure the processor to perform certain operations. The operations include receiving sensor measurements from an electric power source or device and generating, based on the sensor measurements, a droop control procedure that includes a droop control curve having a non-constant slope. The operations further include regulating a power delivery from the electric power source or device to a bus according to the droop control procedure.

IPC Classes  ?

• G05B 15/02 - Systems controlled by a computer electric
• H02J 4/00 - Circuit arrangements for mains or distribution networks not specified as ac or dc
• H02J 3/28 - Arrangements for balancing the load in a network by storage of energy
• 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
• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors

Abstract

Provided is a premagnetization device for a converter system that is connectable to a three-phase electrical grid that has a three-phase power transformer, a converter connected to the power transformer and a circuit-breaker on the grid side of the power transformer. The premagnetization device is premagnetizes the power transformer in a state isolated from the grid. The premagnetization device uses a single-phase reference voltage (Uref) that has a fixed relationship to the grid voltage (Ugrid) with regard to the voltage parameters, in order to generate, based on the measured instantaneous reference voltage (Uref) and the known fixed parameter relationships, by actuating the converter, a three-phase alternating voltage synchronous to the grid voltage (Ugrid) on the grid side of the power transformer.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 1/36 - Means for starting or stopping converters
• H02M 7/12 - 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
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02H 1/04 - Arrangements for preventing response to transient abnormal conditions, e.g. to lightning
• H02H 9/00 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection

Abstract

Provided is a power distribution system that includes a reconfigurable DC/DC power converter configured to be connected with an energy storage device at an input end for receiving an input voltage therefrom, and a power electronics building block having a primary bridge unit, a secondary bridge unit magnetically connected with the primary bridge unit, and an outer bridge unit at an output end and connected to an output of the secondary bridge unit, configured to output an output voltage.

IPC Classes  ?

• H02J 1/12 - Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
• H02J 7/34 - Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
• 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 7/797 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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 7/81 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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 arranged for operation in parallel
• 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
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
• 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
• 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

The invention relates to a power system that includes an electrical machine, (e.g., a motor or generator). The electrical machine has a stator with a stator winding connected to a power converter. The power system includes an assembly to reduce, and optionally eliminate, common mode currents between the electrical machine and the power converter. The assembly includes a stator frame connected to ground potential and an electrical insulator (e.g., a plurality of stator mounts) located between the stator frame and the stator.

IPC Classes  ?

• H02K 11/40 - Structural association with grounding devices
• H02K 11/02 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• H02P 29/024 - Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
• H02K 11/01 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields
• H02K 11/33 - Drive circuits, e.g. power electronics
• H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
• H02K 5/24 - Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
• H03H 7/06 - Frequency selective two-port networks including resistors

Abstract

A device for testing a power module of a set of power modules connected together includes reactive power compensation means capable of compensating the reactive power transferred between a tested power module and the other power modules, and means for monitoring the power generated by the tested power module including means for comparing said generated power with at least one threshold value.

IPC Classes  ?

• H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
• G01R 31/42 - AC power supplies
• F03D 17/00 - Monitoring or testing of wind motors, e.g. diagnostics
• G01R 31/34 - Testing dynamo-electric machines
• G01R 21/00 - Arrangements for measuring electric power or power factor
• G05F 1/66 - Regulating electric power

Abstract

Provided is a method for performing automatic modularity control of an inverter and an inverter that includes DC power sources configured to supply DC power, a plurality of converters to convert direct current power to alternating current power to be supplied to a load, and a controller. The controller performs automatic modularity control of the plurality of converters, by separately controlling the plurality of converters and detecting an operation status thereof and performs fault detection at the plurality of converters at an early stage and isolates a respective converter of the plurality of converters, while continuously supplying power to the load via remaining converters of the plurality of converters. The automatic modularity control further includes early fault detection based continuous monitoring of the current produced by each converter and semiconductor switching feedback and cyclic starting of the inverter to normalize the lifecycle of the circuit breaker.

IPC Classes  ?

• 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
• 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
• H02H 7/122 - 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 rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
• H02S 40/34 - Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
• H01L 31/02 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof - Details
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• G05F 1/67 - Regulating electric power to the maximum power available from a generator, e.g. from solar cell

Abstract

Element of a rotating electrical machine, of the rotor or stator type, comprising a plurality of stacks of magnetic sheets each equipped with a tooth comprising notches intended to accommodate electrical windings, and pins arranged between two successive bundles of sheets forming an air-flow duct. A portion of the pins is distributed asymmetrically on the tooth of the stator or rotor sheet with respect to a median axis of the width of the tooth.

IPC Classes  ?

• H02K 9/04 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
• H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
• H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 21/12 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets

Abstract

A system and method of operating a pumped storage power plant using a double fed induction machine with a frequency converter in a rotor circuit is disclosed. A current target value for the rotor current frequency is determined based on a target power to be transmitted between an electrical grid and the double fed induction machine depending on measured actual operating variables. A current inadmissible synchronous deadband is determined depending on variables characterizing a current state of the pumped storage power plant. The synchronous deadband is determined by a permissible minimum required rotor current frequency or speed difference of the rotor speed from the synchronous speed for the stationary operation. The converter is controlled to generate voltages and currents with the current target value of the rotor current frequency if the current target value of the rotor current frequency or speed does not fall in the current inadmissible synchronous deadband.

IPC Classes  ?

• H02P 9/30 - Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
• H02P 9/00 - Arrangements for controlling electric generators for the purpose of obtaining a desired output
• F03B 13/06 - Stations or aggregates of water-storage type
• H02P 9/10 - Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
• H02P 101/10 - Special adaptation of control arrangements for generators for water-driven turbines

Abstract

A dual submodule is created for a modular multilevel converter, whereby the dual submodule has two interconnected submodules, whereby each submodule has an asymmetrical half-bridge circuit with two parallel bridge branches, which are connected between a first and a second terminal connection of the submodule, whereby each bridge branch is formed from a series circuit of a power semiconductor switch, and a diode, whereby the power semiconductor switch is allocated to an antiparallel free-wheeling diode, and has a capacitor, which is connected in parallel with the asymmetrical half-bridge circuit between the first and the second terminal connections of the module. The submodules are connected to each other via their AC terminals to form the dual submodule. Further, a modular multilevel converter is created, comprising a number of such dual submodules in each of its converter branches.

IPC Classes  ?

• H02M 7/483 - Converters with outputs that each can have more than two voltage levels
• 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

Abstract

The invention relates to a method for determining the direction and the amplitude of a force applied to a system (10) comprising a stationary portion (13) and a mobile portion (12) which can deform when exposed to said force. Mechanical deformations applied to the mobile portion when exposed to said force are measured by measuring a distance between the stationary portion and the mobile portion in the direction of application of the force, and the distance measurements are processed in order to determine the amplitude and the direction of the force.

IPC Classes  ?

• B63H 5/125 - Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction
• G01L 5/12 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring axial thrust in a rotary shaft, e.g. of propulsion plants
• B63B 9/00 - Methods of designing, building, maintaining, converting, refitting, repairing, or determining properties of, vessels, not otherwise provided for

Abstract

Sealing device for a propeller shaft of a marine vehicle propulsion unit including a plurality of sealing lips axially offset relative to each other, with a receiving space for a hydraulic fluid delimited by two adjacent sealing lips, at least one buffer space axially offset with respect to the receiving space and delimited by two adjacent sealing lips, whereby the sealing device includes suitable feeding means for supplying the buffer space with a buffer fluid. The device includes a sampling circuit able to sample fluid included in the buffer space and a monitoring device able to check parameters of the fluid sampled by the sampling circuit.

IPC Classes  ?

• F16J 15/00 - Sealings
• F16J 15/3232 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
• F16J 15/40 - Sealings between relatively-moving surfaces by means of fluid
• B63H 23/32 - Other parts
• F16J 15/3296 - Arrangements for monitoring the condition or operation of elastic sealings; Arrangements for control of elastic sealings, e.g. of their geometry or stiffness

Abstract

This bidirectional power conversion system for a single-phase electric load is intended to be connected to a continuous supply bus delivering a single supply voltage and deliver to the load an alternating output voltage substantially in a cradle form. It includes a set of intertwined converters able to jointly deliver a control voltage whose phase shift of its fundamental component with respect to the output voltage is intended to control the transfer of power between converters and the load, said converters being controlled in such a way that the amplitude of the average value of the control voltage corresponds to the amplitude of the alternating output voltage and in such a way that said control voltage has amplitudes capable of reducing the fluctuations of a current flowing between the voltage converters and the load.

IPC Classes  ?

• 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
• H02M 1/12 - Arrangements for reducing harmonics from ac input or output
• 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 3/00 - Conversion of dc power input into dc power output

Abstract

A control device and method for large power converters having a high number of power cells may contain power semiconductor switching elements, receive commands from a central control unit, and send information to the central control unit. The control device comprises multiplexer/demultiplexer device(s), which comprises an uplink port for connection to the central control unit, a plurality of downlink ports for direct connection to a communications interface of an associated power cell, and a communications control and management module. The communications control and management module may extract information from a transmit frame received from the central control unit via the uplink port, may feed this information to the corresponding downlink port for the relevant power cell , may insert response information received from particular power cells into a receive frame, and may send this via the uplink port to the central control unit.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02M 7/483 - Converters with outputs that each can have more than two voltage levels
• 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
• 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
• 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 invention relates to a cover to enclose a longitudinal section of at least one electrical conductor and prevent the formation of an arc or a flashover. The cover has at least two cover parts made of an electrically insulating material. A first cover part and a second cover part each have at least one passage opening. Each passage opening has an electrical conductor guided through it, so that no gap opening, or only a small gap opening remains between the outside surface of the conductor and a bordering wall of the passage opening. Moreover, the cover has at least one connection location. At this connection location, two of the cover parts that are present lie against one another in a force-fit and/or positive-fit manner and form a nondestructively detachable connection. This ensures accessibility to the protected longitudinal section.

IPC Classes  ?

• H02G 15/115 - Boxes split perpendicularly to main cable direction
• H01R 4/70 - Insulation of connections
• H02G 5/02 - Open installations
• H02G 15/117 - Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes for multiconductor cables
• H01R 4/22 - End caps, i.e. caps of insulating or conductive material for covering or maintaining connections between wires entering the cap from the same end
• H01R 4/60 - Connections between or with tubular conductors

Abstract

A power switch apparatus for a power converter includes a semiconductor power switch and a gate drive unit connected to the semiconductor power switch for supplying gate drive signals to the semiconductor power switch to switch it on and off to cause the power converter to generate an alternating current voltage having a nominal operational frequency based on command signals received from a controller. The gate drive unit receives command signals based on the AC voltage to be generated and to alter the switching events of the semiconductor power switch by addition of a pre-defined jitter-like deviation to the gate drive signals such as to cause the power converter to generate an AC voltage having a modified operational frequency which partly and temporarily deviates from the nominal operational frequency by a pre-defined minimum percentage. A power converter comprising such a power switch apparatus is also disclosed.

IPC Classes  ?

• 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 5/293 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
• H03K 17/28 - Modifications for introducing a time delay before switching

Abstract

Certain embodiments of the present invention relates to a method for controlling operation of a parallel converter system (100). The parallel converter system (100) includes multiple parallel power converters (1014,10N4), and each of the parallel power converters is coupleable to a corresponding controller (1012,10N2). The method includes: generating, via each of the controllers (1012,10N2), a channel reference signal (VRK), transmitting each of the generated channel reference signals (VRK) to a corresponding one of the parallel power converters (1014,10N4), and adjusting an output current of each of the parallel converters (1014,10N4) responsive to the corresponding channel reference signals(VRK) received, the adjusting controlling a combined output current of the parallel converter system (100). The channel reference signals of these parallel power converters (1014,10N4) are generated in response to the participation factors (PK) of each of the parallel power converters (1014,10N4), and a net converter output reference current.

IPC Classes  ?

• H02M 5/458 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 7/81 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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 arranged for operation in parallel

Abstract

A magnetic mass for an electric machine rotor movable about an axis extends along the axis and comprises: first longitudinal through-holes able to receive a respective first tie rod and at a first distance with respect to the axis of rotation, in a radial direction substantially perpendicular to the axis of rotation; first tie rods, received in a respective first longitudinal hole. The magnetic mass also comprises: at least one second longitudinal through-hole able to receive a respective second tie rod and at a second distance with respect to the axis of rotation in a radial direction substantially perpendicular to the axis of rotation, the second distance being different from the first distance, and at least one second tie rod received in a respective second longitudinal hole.

IPC Classes  ?

• G06F 17/50 - Computer-aided design
• G06F 15/78 - Architectures of general purpose stored program computers comprising a single central processing unit
• G06F 12/06 - Addressing a physical block of locations, e.g. base addressing, module addressing, address space extension, memory dedication
• G06F 3/06 - Digital input from, or digital output to, record carriers
• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
• H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines

Abstract

Provided is an electric machine health monitoring system that includes an electric machine, a data acquisition component, a local transmitter, a communications network, and a remote diagnostic unit that is configured to receive the time sequenced operational information, asset performance, and health status indicators from a local transmitter. The remote computational unit comprises software that is configured to perform diagnostic analysis of time sequenced operational information to determine the asset performance and health status of the electric machines.

IPC Classes  ?

• G06F 11/00 - Error detection; Error correction; Monitoring
• G06F 11/07 - Responding to the occurrence of a fault, e.g. fault tolerance
• G06F 11/30 - Monitoring
• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
• G05B 23/02 - Electric testing or monitoring

Abstract

The invention relates to a supply system for a plurality of loads connected in parallel to a direct current supply bus. The supply system includes a DC supply bus and a plurality of supply lines connected in parallel to the supply bus and supplying the said loads. The supply system includes uncoupling and damping means that is adapted to decrease the unipolar signals travelling within the supply system while the loads are being supplied. The uncoupling and damping means includes at least one inductance arranged in series in at least one of the supply lines. Protective means (are also provided for protection in the event of a fault.

IPC Classes  ?

• H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• H02H 7/26 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
• H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link
• H02H 7/22 - 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 switching devices
• H02M 7/44 - Conversion of dc power input into ac power output without possibility of reversal by static converters

Abstract

a and a secondary winding, the primary winding being connected to the output terminals of the main power converter. Main switchgear is connected between the secondary winding of the main transformer and the power grid. An auxiliary transformer has a primary winding connected to the power grid in parallel with the main switchgear and a secondary winding connected to the controller. A pre-charge circuit is connected between the auxiliary transformer and the DC link.

IPC Classes  ?

• H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
• H02H 9/00 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
• H02J 3/42 - Synchronising a generator for connection to a network or to another generator with automatic parallel connection when synchronism is achieved
• H02M 7/12 - 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
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 1/36 - Means for starting or stopping converters

Abstract

A power distribution system includes power converter systems electrically connected to a distribution bus which defines a point of common coupling. Each power converter system includes a power converter with semiconductor switching devices controlled using a pulse width modulation strategy with a switching frequency. A controller for each power converter system applies a spectrum analysis process to the respective power converter system that uses measured or derived zero sequence currents associated with the respective power converter system to determine the location of a ground fault within the power distribution system. Each controller applies a switching frequency process where the switching frequency of the power converter of at least one of the power converter systems is different from the switching frequency of the power converter of at least another one of the power converter systems during at least part of the time that the spectrum analysis process is applied.

IPC Classes  ?

• H02H 7/26 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
• H02H 3/16 - 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 fault current to earth, frame or mass
• G01R 31/50 - Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
• G01R 31/08 - Locating faults in cables, transmission lines, or networks
• H02H 1/00 - EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS - Details of emergency protective circuit arrangements
• G01R 19/25 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
• G01R 23/16 - Spectrum analysis; Fourier analysis

Abstract

There is provided a system for analyzing and controlling a productivity of a drilling apparatus. The exemplary system includes a processor and a memory including instructions that cause the processor to perform certain operations. The operations can include receiving information from a control system of the drilling apparatus and determining a key performance metric based on the information. The operations can further include performing a comparison between the key performance metric and at least one other key performance metric. Furthermore, the operations can further include instructing, based on the comparison, the control system to alter the productivity of the drilling apparatus.

IPC Classes  ?

• E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
• E21B 47/00 - Survey of boreholes or wells
• E21B 41/00 - Equipment or details not covered by groups
• E21B 45/00 - Measuring the drilling time or rate of penetration

Abstract

Provided is an auxiliary wye ring configured for supplemental attachment to a deployed generator. The generator includes a rotor and windings extending circumferentially around the rotor. The auxiliary wye ring includes connection points for coupling to an original wye ring attached to the deployed generator prior to deployment.

IPC Classes  ?

• H02K 11/30 - Structural association with control circuits or drive circuits
• H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
• H02K 17/42 - Asynchronous induction generators
• H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
• F03D 9/25 - Wind motors characterised by the driven apparatus the apparatus being an electrical generator
• H02K 3/51 - Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only
• H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
• H02K 17/24 - Asynchronous induction motors having rotors with windings connected to slip-rings in which both stator and rotor are fed with AC

Abstract

A power distribution system has a power converter with a plurality of semiconductor switching devices per phase, a PWM controller, and a current limitation controller. The current limitation controller is adapted, at least when a short-circuit fault is detected, to calculate the difference between a measured current for each phase and a reference current for the corresponding phase. If the calculated difference is located outside a predetermined current range centered about the reference current for the corresponding phase, the current limitation controller will allow the semiconductor switching devices of the corresponding phase to be turned on and off by the PWM controller. Otherwise, if the calculated difference is located inside the predetermined current range, the current limitation controller will control the semiconductor switching devices for the corresponding phase to be turned off irrespective of the PWM control strategy applied by the PWM controller.

IPC Classes  ?

• H02H 9/08 - Limitation or suppression of earth fault currents, e.g. Petersen coil
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02M 5/458 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
• B60L 3/00 - Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
• H02H 7/122 - 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 rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
• H02H 7/125 - 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 rectifiers for static converters or rectifiers for rectifiers
• 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
• 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

Abstract

A method for controlling at least two three-phase power converters with asynchronous pulse-width modulation. The method further comprises the following steps: for each phase of each converter, the characteristics of the signals used to generate the modulating signal and carrier signal of each control signal of each phase of each converter are determined, for each converter, a phase shift is inserted between the carrier signals used to generate the phase control signals of the converter, for each phase, a phase shift is inserted between the carrier signals used to generate the control signals of the converters, for each phase of each converter, a pulse-width modulation control signal by intersection is determined resulting from the intersection of a modulating signal and a carrier signal, and the control signals are transmitted to the converters.

IPC Classes  ?

• H02M 1/12 - Arrangements for reducing harmonics from ac input or output
• 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
• 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
• H02M 7/04 - Conversion of ac power input into dc power output without possibility of reversal by static converters
• H02M 7/44 - Conversion of dc power input into ac power output without possibility of reversal by static converters

Abstract

dc characteristic curve of the inverter, above which the maximum AC output current of the inverter decreases. In the FRT operating mode, an energy dissipation device dissipates power from the DC voltage link and is controlled to keep the DC link voltage within a range below the saturation voltage.

IPC Classes  ?

• H02M 7/537 - 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
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• G05F 1/67 - Regulating electric power to the maximum power available from a generator, e.g. from solar cell

Abstract

A rotor for an asynchronous electrical machine comprising a magnetic ring comprising a plurality of layers of ferromagnetic metal sheets stacked axially and a squirrel cage having a plurality of conductive elements regularly distributed over the periphery of the magnetic ring and each having two opposite ends extending axially beyond the magnetic ring and each connected to a short-circuit crown, arranged axially on either side of the magnetic ring and intended to connect the ends of the conductive elements electrically. The rotor is segmented circumferentially into at least two rotor segments.

IPC Classes  ?

• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
• H02K 1/30 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
• H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
• H02K 1/26 - Rotor cores with slots for windings
• H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
• 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 method, apparatus, and system to control and test a solar inverter are provided. The method commissions a solar inverter of a solar plant before it is placed into power production. The commissioning process verifies that the inverter to be tested is functioning as intended by connecting a first inverter to the inverter to be commissioned, and using the first inverter to emulate the power grid without being connected to the power grid, and circulate reactive and limited active power between the first inverter and the inverter to be commissioned.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• H02M 7/44 - Conversion of dc power input into ac power output without possibility of reversal by static converters
• H02S 40/32 - Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
• H02S 50/10 - Testing of PV devices, e.g. of PV modules or single PV cells

Abstract

A precharging circuit for precharging an intermediate circuit capacitor of a converter formed from at least one electrolytic capacitor using a grid current from a supply grid before the converter is connected to the supply grid and is used for the reformation of at least one electrolytic capacitor of the intermediate circuit capacitor. A method is provided for the reformation of an intermediate circuit capacitor of a converter formed from at least one electrolytic capacitor, which is connected to the supply grid using a precharging circuit. A converter is created for converting an AC grid voltage into a direct voltage or vice versa, with a device for the reformation of electrolytic capacitors of an intermediate circuit capacitor of the converter using an integrated precharging circuit of the converter. Existing hardware can be used for the reformation of electrolytic capacitors in a converter, and the expense associated with the reformation can be minimized.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02M 5/458 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
• H01G 11/20 - Reformation or processes for removal of impurities, e.g. scavenging
• H02J 7/34 - Parallel operation in networks using both storage and other dc sources, e.g. providing buffering

Abstract

The drive unit (12) is designed to be mounted on a marine vessel (2), including a mobile housing, (16) and is able to pivot around an axis (A) against the hull (4) of the marine vessel. A drive shaft (20) mounted rotary is against the mobile housing (16) and is supported by two roller bearings (24, 26). A propulsion element (36) rotates in solidarity with the drive shaft. The propulsion unit has, at the front, at least two braking and locking systems (40) of the drive shaft (20) located in an area between the upstream rolling bearing and propulsion element (36).

IPC Classes  ?

• B63H 23/35 - Shaft braking or locking, i.e. means to slow or stop the rotation of the propeller shaft or to prevent the shaft from initial rotation
• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means
• F16D 55/00 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
• F16D 49/00 - Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like

Abstract

A cradle for an electric machine comprises a frame delimiting a seat for receiving part of the machine and extending in a vertical direction and comprising a lower edge and an upper edge, the lower edge being intended for connection to a support. The upper edge comprises one or two receiving seats able to receive a respective bearing and comprising a base wall and two side walls.

IPC Classes  ?

• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
• H02K 5/24 - Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
• H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
• H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

There are provided control systems and methods for charging batteries. For instance, there is provided a system for charging at least two batteries. The system can include a set of hardware associated with the at least two batteries, and the at least two batteries can be connected in series. Each battery from the at least two batteries can be associated with a subset of the set of hardware, and one subset of the set of hardware can be configured to control an associated battery independently from another subset of the set of hardware and its associated battery.

IPC Classes  ?

• 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

A method and a device for controlling a voltage-controlled power semiconductor switch that can be switched off again, which has a first and a second connection and a control connection and which is conductive in the switched on state between the first and the second connection is provided. Firstly, a first control voltage comprising a first value is applied to the control connection to switch on the power semiconductor switch. Subsequently, conditions are detected, which indicate the progress of the switch-on procedure of the power semiconductor switch. As soon as conditions are detected, which are indicative of the fact that the switch-on procedure is deemed to be complete, a second control voltage comprising a second value higher than the first value is applied to the control connection to operate the power semiconductor switch in the conductive state with a higher control voltage to reduce its conduction losses.

IPC Classes  ?

• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H03K 17/18 - Modifications for indicating state of switch
• H02M 7/757 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
• H02M 7/797 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
• H03K 17/16 - Modifications for eliminating interference voltages or currents
• H02M 7/483 - Converters with outputs that each can have more than two voltage levels
• 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

There are provided methods, systems, and electronic assemblies for efficient thermal management in electronics applications. For example, there is provided an electronic assembly that includes a thermal management system that can include a heat sink having electronic components mounted thereon. The electronic components can be mounted on the heat sink in a staggered pattern along a centerline substantially perpendicular to a direction of flow of a coolant.

IPC Classes  ?

• H01L 23/24 - Fillings characterised by the material, its physical or chemical properties, or its arrangement within the complete device solid or gel, at the normal operating temperature of the device
• H01L 23/467 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing gases, e.g. air
• 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
• 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
• H01L 25/00 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices
• H01L 23/373 - Cooling facilitated by selection of materials for the device

Abstract

An electric machine rotor, which extends along an axis of rotation, including a short-circuit cage, the or each first connection means between a respective first end part of the or each bar and the first short-circuit ring includes a plurality of flexible electrically conductive blades.

IPC Classes  ?

• H02K 17/00 - Asynchronous induction motors; Asynchronous induction generators
• H02K 17/16 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors

Abstract

There is provided a power converter unit that can include an inverter and a plurality of batteries. The power converter unit can include a battery energy storage system (BESS) and an inverter. The BESS and the inverter can share at least one protection circuit.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H01M 10/667 - Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an electronic component, e.g. a CPU, an inverter or a capacitor
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H01M 10/6561 - Gases
• 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
• H02M 7/00 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output

Abstract

There is provided a power converter unit that can include an inverter and a plurality of batteries. The inverter and the plurality of batteries can be cooled by a common thermal management system. Furthermore, the power converter unit that can include a battery enclosure and the inverter can be co-located with the plurality of batteries inside the battery enclosure.

IPC Classes  ?

• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H01M 2/10 - Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
• H01M 2/20 - Current-conducting connections for cells
• H02M 7/00 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output