Abstract

Provided are: an inkjet recording device with which it is possible to remotely perform maintenance and management such as a print-head cleaning process; and an inkjet recording system.　This inkjet recording system comprises: an inkjet recording device; a server connected to the inkjet recording device; a network connected to the server; and an external control device that is connected to the network and that controls the inkjet recording device via the server. The inkjet recording device comprises: a print head having a nozzle which forms particles from an ink and ejects the particles, a charging electrode for charging the ink particles, a deflection electrode for deflecting the charged ink particles, and a gutter through which unused ink is recovered; a body control unit for controlling the print head; and a head mounting unit which has a print head mounting part for accommodating the print head therein and a print head detector for determining whether or not the print head has been accommodated. In addition, the external control device comprises at least: a head mounting confirmation means for checking whether or not the print head is in a state of being mounted to the head mounting unit; and an ink ejection confirmation means for checking whether ink is being ejected from the nozzle of the print head.

IPC Classes  ?

• B41J 2/01 - Ink jet
• B41J 2/02 - Ink jet characterised by the jet generation process generating a continuous ink jet
• B41J 2/08 - Ink jet characterised by jet control for many-valued deflection charge-control type
• B41J 29/38 - Drives, motors, controls, or automatic cut-off devices for the entire printing mechanism

Abstract

This transmission device receives data from a transmission source device, executes processing, and transmits the processed data to a reception destination device. The transmission device comprises a processor which executes a program group, and a storage device which stores initial configuration information and the program group, wherein each of the program groups is a program that is suitable for any one of a reception protocol, a processing protocol, and a transmission protocol, and the initial configuration information defines designation information for designating a program that is suitable for the protocol for each of the protocols. The processor: receives a selection between the reception protocol and the transmission protocol, and an input of a first configuration parameter to a first program suitable for the reception protocol and the transmission protocol; acquires first designation information for designating the first program with reference to the initial configuration information; and activates the first program by using the first designation information and the first configuration parameter.

IPC Classes  ?

• H04L 41/0806 - Configuration setting for initial configuration or provisioning, e.g. plug-and-play
• H04L 67/06 - Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]

Abstract

The present invention includes a piston (14) that includes a piston ring groove (14b) on an outer peripheral surface formed by a curved surface, and that reciprocates while pivoting in a cylinder (15); a piston ring (14c) that is mounted in the piston groove (14b) and that slides on an inner circumferential surface of the cylinder (15); and a crank shaft (11) that causes the piston (14) to reciprocate via a connecting rod (13). A center axis (AX1) of the cylinder (15) is disposed at a position separated from a rotation axis (AX2) of the crank shaft (11). A rotation stopper (14i) of the piston ring (14c) is provided in the piston ring groove (14b). In a compression step, abutment clearances (14hc), (14hd), (14he) of the piston ring (14c) are positioned on the outer peripheral surface (14a) side of the piston (14) which is in a state of being against the inner circumferential surface of the cylinder (15).

IPC Classes  ?

• F04B 39/00 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups

Abstract

A suction flow path of a screw compressor according to the present invention comprises: a male-side flow path opening in an axial direction to a working chamber of the suction stroke of a male rotor 2 side and extending from a starting end on one side of a virtual plane to a first termination end on the other side; and a female-side flow path opening in the axial direction to a working chamber of the suction stroke of a female rotor side and extending from a starting end to a second terminal end on the other side of the virtual plane. A flow path wall of the male-side flow path includes a male-side first flow path wall facing a rotor tooth section side, and a flow path wall of the female-side flow path includes a female-side first flow path facing the rotor tooth section side. The male-side first flow path wall or the female-side first flow path wall approaches the male-side rotor tooth section or the female-side rotor tooth section moving from the starting end side to the first termination end side or the second termination end side in at least a partial section from the starting end to the first termination end or the second termination end.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
• F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

Abstract

The present invention achieves highly accurate control characteristics by estimating an induced voltage coefficient of a magnet motor without rotary auto-tuning. The present invention achieves highly accurate control characteristics by estimating an induced voltage coefficient of a magnet motor without rotary auto-tuning. A first power Pc is calculated on the basis of the output voltage and output current of the magnet motor, and a second power Pc{circumflex over ( )} is calculated on the basis of the electric circuit constant, current command, output frequency, and induced voltage coefficient of the magnet motor. The induced voltage coefficient is estimated so that the calculated first power follows the second power, and the driving of the magnet motor is controlled in accordance with the induced voltage coefficient.

IPC Classes  ?

• H02P 21/16 - Estimation of constants, e.g. the rotor time constant
• H02P 21/22 - Current control, e.g. using a current control loop

Abstract

This compressor previously obtains a bearing temperature rise of a bearing and stores the bearing temperature rise as a first bearing temperature rise pattern, compares an actual second bearing temperature rise pattern of the bearing detected by a temperature sensor with the prestored first bearing temperature rise pattern, and, when it is determined that the bearing temperature rise is a temperature rise due to grease filling, performs control so that an alarm is not activated.

IPC Classes  ?

• H02P 29/62 - Controlling or determining the temperature of the motor or of the drive for raising the temperature of the motor
• F16C 33/66 - Special parts or details in view of lubrication
• F16C 41/00 - Other accessories for bearings

Abstract

This invention provides a gas compressor comprising: a compressed gas passage through which a compressed gas discharged from the compressor body passes; a temperature sensor that measures the temperature of the compressed gas passing through the compressed gas passage; a compressed gas cooler that cools the compressed gas; a condensate discharge valve that discharges condensates resulting from cooling of the compressed gas; and a controller that controls the opening/closure of the condensate discharge valve, and characterised in that the controller controls the opening/closure of the condensate discharge valve on the basis of a change in the temperature of the compressed gas measured by the temperature sensor.

IPC Classes  ?

• F04B 49/22 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by means of valves
• F04B 39/16 - Filtration; Moisture separation
• F04B 49/06 - Control using electricity
• F04B 51/00 - Testing machines, pumps, or pumping installations

Abstract

With the aim of improving the reliability of a power conversion device for driving a motor, this power conversion device is provided with a rectifying portion for rectifying an AC voltage and outputting a DC voltage, a smoothing capacitor for smoothing the DC voltage, an inverter portion into which the DC voltage is input and which outputs AC power, an inverter drive portion for outputting a gate signal to the inverter portion, a regenerative braking portion connected in parallel with the smoothing capacitor, a regenerative braking drive portion for outputting a gate signal to the regenerative braking portion, a control portion for outputting drive signals to the inverter drive portion and the regenerative braking drive portion, a regenerative braking overcurrent detecting portion for outputting an overcurrent detection signal if the current flowing through the regenerative braking portion exceeds a determination value, and a latch portion into which the overcurrent detection signal output from the regenerative braking overcurrent detecting portion is input and which outputs a gate output interruption signal to the control portion, wherein switching elements of the inverter portion and the regenerative braking portion stop in an off state when the regenerative braking overcurrent detection portion detects an overcurrent.

IPC Classes  ?

• 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
• 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 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 network environment is built in an already-existing production line without significant cost to provide a novel and user-friendly inkjet printer system. A portable repeater 3 includes a carriageable storage unit and is interposed between an inkjet printer 6 and a server 5. The inkjet printer 6 and the repeater 3 are communicated with other over short-range wireless 2 to transmit print related data from the inkjet printer 6 to the repeater 3 or from the repeater 3 to the inkjet printer 6, and the repeater 3 and the server 5 are communicated with each other over a communication network 4 to transmit the print related data either from the server 5 to the repeater 3 or from the repeater 3 to the server 5. This enables building of the network environment in an already-existing production line without significant cost.

IPC Classes  ?

• G06F 3/12 - Digital output to print unit
• G06F 21/60 - Protecting data

Abstract

A motor control device for controlling a machine comprises: an identification unit that estimates an inertia moment and viscosity friction; a velocity command generation unit that generates a velocity command, which is obtained by integrating an acceleration command; a differential signal calculation unit that calculates a differential signal from acceleration commands of different times; and an identification period determination unit that determines a validity period for operating the identification unit on the basis of the differential signal, and operates the identification unit in the validity period. The motor control device drives a motor on the basis of the velocity command generated by the velocity command generation unit, and the identification unit estimates the inertia moment and viscosity friction.

IPC Classes  ?

• H02P 29/00 - Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
• G05B 11/36 - Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
• H02P 21/16 - Estimation of constants, e.g. the rotor time constant

Abstract

The purpose of the present invention is to provide a gas compressor with which it is possible to adjust the temperature of a heat recovery liquid discharged from an exhaust heat recovery heat exchanger to a desired temperature at low cost without installing a temperature control valve or the like in the path of the heat recovery liquid. To achieve this purpose, a gas compressor comprises a heat exchange liquid temperature sensor 34 that detects the temperature of a heat exchange liquid discharged from an exhaust heat recovery heat exchanger 11, and a path 21 through which at least some of a high-temperature fluid cooled by an air-cooled cooler 20 flows into a compressor body 1, the gas compressor also comprising a heat exchange liquid temperature sensor 34 that detects the temperature Tw2 of a heat exchange liquid discharged from the exhaust heat recovery heat exchanger 11, and a controller 37 having a heat exchange liquid temperature adjustment function for controlling the rotation speed of a cooling fan 30 so that the temperature Tw2 detected by the heat exchange liquid temperature sensor 34 approaches a prescribed target heat exchange liquid temperature Tw2t.

IPC Classes  ?

• F04B 39/06 - Cooling; Heating; Prevention of freezing
• F04C 29/04 - Heating; Cooling; Heat insulation
• F24H 1/00 - Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
• F24H 15/174 - Supplying heated water with desired temperature or desired range of temperature
• F24H 15/35 - Control of the speed of fans

Abstract

This gas compressor comprises: a low-pressure gas path that guides compressed gas discharged from a low-pressure stage compressor body to a high-pressure stage compressor body; a first low-pressure relief valve provided to a first low-pressure branch path that branches from a low-pressure gas path; a high-pressure gas path that guides compressed gas discharged from the high-pressure stage compressor body to a demand destination; a first high-pressure relief valve provided to a first high-pressure branch path that branches from the high-pressure gas path; and a control device. The first low-pressure branch path is provided downstream of a heat exchanger for low-pressure stage heat recovery. The first high-pressure branch path is provided downstream of a heat exchanger for high-pressure stage heat recovery. The control device opens the first low-pressure relief valve and the first high-pressure relief valve when switching from a load operation to a no-load operation.

IPC Classes  ?

• F04C 28/06 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
• F04B 41/06 - Combinations of two or more pumps
• F04C 23/00 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids

Abstract

Provided are a partial discharge detection device and a partial discharge detection method capable of separating external noise from internal partial discharge and reliably detecting the internal partial discharge under a situation in which the external noise and the internal partial discharge are mixed.　The partial discharge detection device comprises: a transient grounding voltage sensor 12 that is provided in a high voltage device and that measures a transient grounding voltage; a partial discharge detection signal selection means 13, 15 for selecting a partial discharge detection signal relating to internal partial discharge among detection signals outputted from the transient grounding voltage sensor; a partial discharge generation detection means 18 for detecting a partial discharge generation signal indicating generation of the internal partial discharge from the selected partial discharge detection signal; a partial discharge generation signal holding means 19, 20 for holding the detected partial discharge generation signal; and a sampling means 23 for sampling the partial discharge generation signal held by the partial discharge generation signal holding means for each arrival of a prescribed sampling period.

IPC Classes  ?

• G01R 31/12 - Testing dielectric strength or breakdown voltage

Abstract

Provided are a power conversion device and a remote monitoring system capable of calculating the life of a power semiconductor device with high accuracy. In order to achieve the above purpose, a power conversion device, which controls the flow or interruption of a current with an inverter having a power semiconductor device and performs desired power conversion, comprises: a motor control unit which calculates a gate signal on the basis of a current value, a speed command, and a carrier frequency detected by a current sensor and controls the inverter; a temperature history calculator which estimates the loss of the power semiconductor device and calculates a temperature history; a temperature history storage device which stores the calculation result of the temperature history; and a damage calculator which calculates damage to the power semiconductor device from the temperature history read from the temperature history storage device.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• 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
• 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 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
• H02P 29/68 - Controlling or determining the temperature of the motor or of the drive based on the temperature of a drive component or a semiconductor component

Abstract

Provided is an oil-free air compressor that prevents reverse rotation of a compressor body while the compressor is out of service, thereby preventing oil from entering the compressor body, and improving the reliability, as well as exhibiting a rust preventive effect. An oil-free air compressor 100 comprising: an oil-free compressor body 1 that compresses air and outputs the compressed air; a cooler 5 that is connected to the compressor body, and cools the compressed high-temperature air; a dry air supply mechanism that supplies dry air to an output side of the compressor body; and a mechanism that prevents reverse rotation of the compressor body while the compressor is out of service.

IPC Classes  ?

• F04B 39/00 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups
• F04B 39/16 - Filtration; Moisture separation
• F04C 23/00 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
• F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
• F04C 29/04 - Heating; Cooling; Heat insulation

Abstract

This inkjet printer that comprises: a print head which includes a charge electrode for imparting a charge amount corresponding to a printing character to ink particles, a deflection electrode for causing the ink particles having passed through the charge electrode to be deflected in accordance with the charge amount, and a gutter for collecting non-charged ink particles that are not used for the printing; a control unit which supplies a charging voltage to the charge electrode on the basis of a character pattern corresponding to printing character information; and an inspection instrument which imports an image of a result of printing printed on a print object and checks the printing state. In this inkjet printer, the inspection instrument computes a dot position deviation between the dot position of an attention dot preset for each printing character and a target position of said attention dot, stores computed dot position deviations in chronological order, and determines an ink state of the ink in use on the basis of the stored dot position deviations.

IPC Classes  ?

• B41J 2/02 - Ink jet characterised by the jet generation process generating a continuous ink jet
• B41J 2/01 - Ink jet
• B41J 2/195 - Ink jet characterised by ink handling for monitoring ink quality

Abstract

This power conversion device comprises: a power conversion unit that converts a DC voltage to an AC voltage applicable to a device to be operated; a current detection unit that detects the output current output from the power conversion unit; a storage unit that stores the reference value of the output current detected by the current detection unit or the reference value of a value to be monitored from the device to be operated and the upper and lower limit values determined from the reference value; and a control unit that controls the power conversion unit. The control unit calculates the frequency of the state of exceeding the upper limit value or the frequency of the state of less than the lower limit value and determines whether there is an abnormality or not by comparing the frequency with a predetermined frequency.

IPC Classes  ?

• H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

Provided is a scroll compressor in which the swinging of an orbiting scroll can be suppressed and the power loss can be suppressed.　The scroll compressor comprises a fixed scroll 11 having a spiral wrap 16, an orbiting scroll 12 having a spiral wrap 20, a drive shaft 13 that causes the orbiting scroll 12 to revolve with respect to the fixed scroll 11, a plurality of compression chambers formed between the wrap 20 of the orbiting scroll 12 and the wrap 16 of the fixed scroll 11, a back pressure chamber 28 formed on the back surface side of the orbiting scroll 12, and a communication hole 29 formed in the orbiting scroll 12 such that the back pressure chamber 28 and the compression chamber communicate with each other therethrough. The back pressure chamber 28 communicates with the compression chamber during a discharge process via the communication hole 29 when the crank angle of the drive shaft 13 is within a first range and communicates with the compression chamber during a compression process via the communication hole 29 when the crank angle of the drive shaft 13 is within a second range.

IPC Classes  ?

• F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Abstract

This management system comprises: a measured data acquisition unit that acquires measured data, which is time-series data related to operation of a device; an index computing unit that computes an index on the basis of the measured data; a credit calculation unit that compares indices before and after a change is made to the device, to calculate a credit as a compensation for a reduction in the emission of greenhouse gas; and a credit management unit that links a part of the calculated credit to a user of the device. The credit management unit links a part of the calculated credit to a system operator or a manufacturer of the device.

IPC Classes  ?

• G06Q 50/00 - Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism

Abstract

A control device 1 is provided with: a motor control unit (10, 11, etc.) that supplies a drive current to a motor 3, which is a power source of processing equipment, so as to place the motor 3 in a normal operating state, and, in response to multiplexed commands (S1, S2) that are sent from the outside and relate to a safety function operation of the processing equipment, controls the drive current so as to place the motor 3 and the processing equipment in a safety stop state; and a command monitoring unit 16 that monitors whether or not the commands (High/Low of S1, S2) match each other. If the period during which the commands do not match exceeds an allowable value, the command monitoring unit 16 generates a safety stop signal Sd (High) for safely stopping the motor 3, and continuously sends the safety stop signal Sd (High) to the motor control unit. This configuration makes it possible to facilitate the construction of a safety system that uses a control device.

IPC Classes  ?

• G05B 9/02 - Safety arrangements electric

Abstract

Provided is an electric switchboard which resists temperature rise by reducing heat intrusion from the outer surface due to exposure to sunlight. This electric switchboard comprises a box body 10 in which a substation facility is housed, a door 11 provided on the box body, and a side plate 17 provided on a side of the box body. At least one of the front, rear, and side surfaces of the switchboard is provided with a light-shielding member that is retractable and blocks sunlight. Thus, heat intrusion from the outer surface due to exposure to sunlight is reduced, and temperature rise of the electric switchboard is prevented.

IPC Classes  ?

• E04F 10/06 - Sunshades; Awnings of flexible canopy materials, e.g. canvas comprising a roller-blind with means for holding the end away from a building
• E06B 9/24 - Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance
• E06B 9/13 - Roller shutters with closing members of one piece, e.g. of corrugated sheet metal
• E06B 5/00 - Doors, windows, or like closures for special purposes; Border constructions therefor
• H05K 7/18 - Construction of rack or frame
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H02B 1/30 - Cabinet-type casings; Parts thereof or accessories therefor

Abstract

Provided is a scroll compressor capable of suppressing a reduction in coolability of a radially outer section of an orbiting scroll.　The scroll compressor includes a cooling fan 25 and a cooling-air introducing path 28 that introduces cooling air generated at the cooling fan 25 into the surroundings of cooling fins 20 of an orbiting scroll 12. The cooling fins 20 include: an n-th cooling fin that is located at one side in the width direction of the cooling-air introducing path 28 parallel to an array direction of the cooling fins 20 and at an outer side of the cooling-air introducing path 28; an (n-1)-th cooling fin that is adjacent to the n-th cooling fin at the one side; and an (n+1)-th cooling fin that is adjacent to the n-th cooling fin at the other side. The leading edge of the n-th cooling fin is located downstream of an imaginary straight line connecting the leading edge of the (n-1)-th cooling fin and the leading edge of the (n+1)-th cooling fin.

IPC Classes  ?

• F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
• F04C 29/04 - Heating; Cooling; Heat insulation

Abstract

There is provided a transformer (101) in which deformation of a coil (403, 503, 603) caused by a short-circuit electromagnetic mechanical force can be suppressed by using a coil pressing metal fitting (303, 401, 501, 601) that saves space and that is lightweight. There is provided a transformer (101) in which deformation of a coil (403, 503, 603) caused by a short-circuit electromagnetic mechanical force can be suppressed by using a coil pressing metal fitting (303, 401, 501, 601) that saves space and that is lightweight. A coil pressing metal fitting (303, 401, 501, 601) includes a coil pressing metal fitting base member (201, 301) that comes into contact with a coil (403, 503, 603), and a reinforcement member (302) disposed outside the coil pressing metal fitting base member (201, 301). The reinforcement member (302) is connected and fixed to the coil pressing metal fitting base member (201, 301) by a joining member from inside the coil pressing metal fitting base member (201, 301) through the hole (202, 204) of the coil pressing metal fitting base member (201, 301).

IPC Classes  ?

• H01F 27/30 - Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support

Abstract

There is provided a static induction electric apparatus capable of improving smoothnesses of magnetic flux distributions inside iron cores. A stationary induction electric apparatus including wound iron cores and a winding, wherein each of the wound iron cores is a laminated body of magnetic materials that are lap-joined and at least provided with a step lap joint portion on an inner peripheral side of the wound iron core, and gap distances between ends of the step lap joint potion are gradually shortened toward an outer peripheral side of the wound iron core. Although a configuration of the stationary induction electric apparatus is simple, the stationary induction electric apparatus having improved smoothnesses of magnetic flux distributions inside the iron cores can be provided.

IPC Classes  ?

• H01F 27/26 - Fastening parts of the core together; Fastening or mounting the core on casing or support
• H01F 27/28 - Coils; Windings; Conductive connections
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets

Abstract

A power conversion device capable of shortening the time required for acceleration of a motor and a metal processing device including the power conversion device are provided. Then, a power conversion device 10 includes a converter 100 configured to convert an AC voltage from outside to a DC voltage Vo and a converter controller 107 configured to control the converter 100. The converter 100 includes a voltage doubler circuit 104 configured to boost the DC voltage Vo when activated, and outputs the DC voltage Vo having a voltage value different in accordance with the activation and stop of the voltage doubler circuit 104. The converter controller 107 activates the voltage doubler circuit 104 at a first time that is earlier by a predetermined period than a second time at which a speed command value ω* of the motor 130 rises from a predetermined value.

IPC Classes  ?

• H02M 7/5387 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
• H02M 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 7/06 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
• 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 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

This analysis system comprises a gateway device including a data processing unit for collecting apparatus data from an apparatus and determining the presence or absence of an abnormality in the collected apparatus data in accordance with determination rules, and an analysis server including an analysis unit for exchanging information with the gateway device and analyzing the received information, and an input/output unit for inputting and outputting server determination rules, wherein: the gateway device transmits, to the analysis server, transmission data including a determination result obtained by the data processing unit, and the apparatus data; the analysis server analyzes the transmission data, and if the apparatus data includes apparatus data indicating an abnormality different from an abnormality defined by the determination rules, updates information relating to the server determination rules on the basis of input information and transmits the updated information to the gateway device; and the gateway device updates information relating to the determination rules on the basis of the information relating to the server determination rules.

IPC Classes  ?

• G06F 11/07 - Responding to the occurrence of a fault, e.g. fault tolerance
• G06F 11/34 - Recording or statistical evaluation of computer activity, e.g. of down time, of input/output operation

Abstract

The present invention comprises: a stator core (21) having a slot (21a); a bobbin (22) that is fit into the slot (21a) and that has a through-hole (22c) which penetrates in the axial direction of the stator core (21); a coil (23) which is inserted into the through-hole (22c); a plurality of protrusions (22e) that protrude from the inner circumference of the through-hole (22c) and/or from the outer circumference of the coil (23), and that guide the positioning of the coil (23) in the through-hole (22c); and a resin which, in the through-hole (22c), is filled into the area around the coil (23).

IPC Classes  ?

• H02K 3/46 - Fastening of windings on the stator or rotor structure
• H02K 3/04 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
• H02K 15/04 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
• H02K 15/12 - Impregnating, heating or drying of windings, stators, rotors or machines

Abstract

This power conversion device includes: a plurality of switching elements; a drive unit that drives gates with respect to the switching elements; and a control unit that outputs a control signal to the drive unit. The drive unit includes a voltage monitoring unit that, on the basis of the gate resistance connected to a switching element and the gate resistance potential-difference, detects abnormalities in connection with the switching element.

IPC Classes  ?

• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
• H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H03K 17/567 - Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT

Abstract

The purpose of the present invention is to precisely estimate the necessary electric constant for control of a three-phase induction motor for which the electric constant is unknown.　In order to achieve this purpose, the present invention provides a three-phase induction motor, a fixing mechanism that can fix a rotary shaft of the three-phase induction motor, an inverter that drives the three-phase induction motor, a current detection means that detects the current of the three-phase induction motor, and a drive device that is for an induction motor, that reads a current value detected by the current detection means, and that controls the three-phase induction motor via the inverter, wherein: when the three-phase induction motor is in a state in which the rotary shaft is fixed by the fixing mechanism, the inverter is used to pass a direct current and a three-phase alternating current and the control voltage obtained as a result of the current passage is used to measure the electric constant of the three-phase induction motor.

IPC Classes  ?

• H02P 21/16 - Estimation of constants, e.g. the rotor time constant

Abstract

Provided are an apparatus monitoring system and monitoring method capable of reducing the load on an external terminal that monitors a plurality of apparatuses, and performing, inter alia, verification of the plurality of apparatuses. The apparatus monitoring system is provided with: a plurality of apparatuses 100 each having an electric motor 105, a mechanism unit 107 driven by the electric motor 105, a control unit 103 for controlling power supplied to the electric motor 105, and a communication unit 109; and, an external terminal 201 connected by wireless communication to the control unit 103 via the communication unit 109 of the plurality of apparatuses 100. When the number of the apparatuses 100 already paired with the external terminal 201 is larger than the number with which the external terminal 201 can communicate at one time, the external terminal 201 determines the control unit 103 of which apparatus 100, among the plurality of apparatuses 100, to connect to on the basis of a set sequence.

IPC Classes  ?

• H04Q 9/00 - Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
• F04B 41/02 - Pumping installations or systems specially adapted for elastic fluids having reservoirs
• F04B 41/06 - Combinations of two or more pumps
• F04B 49/06 - Control using electricity
• H04W 76/10 - Connection setup
• H04W 84/10 - Small scale networks; Flat hierarchical networks

Abstract

This data sharing device comprises: a first environment which has a first communication port; a second environment which has a second communication port and which operates independently from the first environment; and a shared memory which can be accessed by both the first environment and the second environment. The first environment comprises a data reception unit that stores, in the shared memory, data received via the first communication port. The second environment comprises: a dedicated memory which can be accessed only from within the second environment; a data acquisition unit that writes data stored in the shared memory to the dedicated memory; an inspection unit that confirms the safety of the data stored in the dedicated memory; and a data transmission unit that transmits the data stored in the dedicated memory to the outside, via the second communication port.

IPC Classes  ?

• G06F 21/56 - Computer malware detection or handling, e.g. anti-virus arrangements
• G06F 12/14 - Protection against unauthorised use of memory

Abstract

The purpose of the present invention is to provide a switch the size of which can be reduced.　In order to achieve the purpose, this switch is configured to have: a main circuit section which is formed from a vacuum interrupter equipped with an opening/closing part formed from a stationary electrode and a movable electrode to be separated from or brought into contact with the stationary electrode, a first bushing conductor electrically connected to a stationary conductor connected to the stationary electrode and pulled out to the outside of the vacuum interrupter, and a second bushing conductor electrically connected to a movable conductor connected to the movable electrode and pulled out to the outside of the vacuum interrupter; and an operation unit which is directly connected to the movable conductor pulled out to the outside of the vacuum interrupter and carries out operation of the opening/closing part by moving the movable electrode, wherein the operation unit is integrally molded with the main circuit section by using a solid insulating member.

IPC Classes  ?

• H01H 33/662 - Housings or protective screens
• H01H 33/666 - Operating arrangements

Abstract

The present invention provides a management device capable of detecting the sensing of an abnormality (degradation) of a power transmission mechanism more precisely and accurately. A management device 30 for a power transmission mechanism that transmits a driving force from an electric motor 13 to a load-side device 12 comprises a current acquisition unit that acquires a current value of the electric motor 13 per unit process for driving the power transmission mechanism, a feature calculation unit 121 that divides the unit process into a plurality of sections and calculates an average current value by averaging the current values of the respective sections, and a diagnosis unit 122 that detects an abnormality. The diagnosis unit 122 calculates a state quantity estimation value on the basis of the average current value of the plurality of sections, and detects an abnormality in unit process on the basis of the state quantity estimation value.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring
• G01M 13/02 - Gearings; Transmission mechanisms

Abstract

The present invention is configured so as to: calculate a prediction error occurring on a movement path between an accuracy decrease position and an accuracy restoration position; and, if the prediction error exceeds an allowable error, change a reference station that receives a correction signal.

IPC Classes  ?

• G01S 19/43 - Determining position using long or short baseline interferometry
• E01C 19/23 - Rollers therefor; Such rollers usable also for compacting soil
• G01S 19/07 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections
• G01S 19/49 - Determining position by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system whereby the further system is an inertial position system, e.g. loosely-coupled
• G05D 1/02 - Control of position or course in two dimensions

Abstract

This communication system includes a management apparatus connected to terminals. Each of the terminals has a log information management unit that collects log information and transmits the information to the management apparatus; a failure self analysis unit that analyzes, from the log information, the presence or absence of an abnormal event in the terminal and decides a self-restoration process; a restoration notification transmission unit that notifies the management apparatus of the self-restoration process with respect to the abnormal event; and a self-restoration processing unit that executes a restoration process with respect to the abnormal event or the self-restoration process ordered from the management apparatus. The management apparatus has: a failure analysis unit that analyzes the presence or absence of an abnormal event in the terminal on the basis of the log information collected from the terminal and decides a restoration process; a restoration notification reception unit that receives, from the terminal, notification about the self-restoration process with respect to the abnormal event; and a restoration order unit that commands the terminal to execute an order for the restoration process with respect to the abnormal event detected by the failure analysis unit in accordance with the presence or absence of notification.

IPC Classes  ?

• G06F 11/07 - Responding to the occurrence of a fault, e.g. fault tolerance

Abstract

Provided is a liquid supply type screw compressor capable of saving energy by reducing the shaft power required for stirring liquid.　The liquid supply type screw compressor has: a male rotor side bore 22A in which a teeth part 13A of a male rotor 11A is housed; a female rotor side bore 22B in which a teeth part 13B of a female rotor 11B is housed; a low pressure side cusp 23 and a high pressure side cusp 24 that are boundaries between a wall surface of the male rotor side bore 22A and a wall surface of the female rotor side bore 22B; and a pocket 29 located adjacent to the low pressure side cusp 23 in the rotor axial direction, and formed to be depressed outward in the rotor radial direction relative to the wall surface of the male rotor side bore 22A and the wall surface of the female rotor side bore 22B. The pocket 29 is formed by inclined surfaces 30A, 30B. The inclined surface 30A extends from the wall surface of the male rotor side bore 22A beyond a virtual plane C1 including the low pressure side cusp 23 and the high pressure side cusp 24.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

Provided is a motor-integrated fluid machine that has improved performance and reliability by efficiently cooling a fluid machine body and a motor without increasing an installation space. The present invention is characterized by being provided with: a fluid machine unit that compresses or expands a fluid; a motor unit that has a drive shaft connected to the fluid machine unit; and a cooling fan that cools the motor unit and the fluid machine unit by sucking cooling air from the motor unit side and that is connected to the drive shaft at the side opposed to that connected to the fluid machine unit, wherein between the motor unit and the cooling fan, the minimum sectional area of a cooling air passage from the outside in the radial direction toward the drive shaft is larger than that of a cooling air passage from the motor unit side toward the cooling fan.

IPC Classes  ?

• F04C 29/04 - Heating; Cooling; Heat insulation
• F04B 39/06 - Cooling; Heating; Prevention of freezing

Abstract

Provided is a circuit breaker comprising: power source-side and load-side connecting plates for wiring; a connecting conductor; and an insulating stand that is attached to a body case and supports the connecting plates, wherein the insulating stand is a cylindrical member, and has an attachment part provided at an outer periphery, a first body case insertion part extending in one direction with respect to the attachment part, and a second body case insertion part extending in the other direction, the first body case insertion part being longer than the second body case insertion part. When the circuit breaker is used as a front surface type, the first body case insertion part of the insulating stand is inserted into an opening of the body case, and the power source-side and load-side connecting plates are supported by the first body case insertion part so as to become parallel to the circuit breaker, and when the circuit breaker is used as a back surface type, the second body case insertion part of the insulating stand is inserted into the opening of the body case, and the power source-side and load-side connecting plates are supported through the insulating stand so as to become perpendicular to the circuit breaker.

IPC Classes  ?

• H01H 71/02 - Housings; Casings; Bases; Mountings

Abstract

A screw compressor includes a screw rotor including a rotor tooth portion and a discharge-side shaft portion, and a casing having a housing chamber that houses the rotor tooth portion, an axial hole through which the discharge-side shaft portion penetrates, and a liquid supply passage that guides liquid to the axial hole. A second axial portion disposed in the axial hole of the discharge-side shaft portion and the axial hole of the casing have a first facing surface and a second facing surface facing each other with a gap therebetween. The discharge-side shaft portion has an annular groove on the first facing surface, and the liquid supply passage opens at a position facing the annular groove on the second facing surface of the axial hole. The second axial portion of the discharge-side shaft portion and the axial hole of the casing have a tapered structure as a structural portion where the diameter decreases in a direction away from the rotor tooth portion in a region farther from the rotor tooth portion than the annular groove portion.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 27/00 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids

Abstract

This system receives a first location data set representing a first positioning location of a shipped product at a first frequency, and receives a second location data set representing a second positioning location of the product at a second frequency. The system displays, on a map, at least one among: n first location display objects respectively representing n first locations based on N first location data sets; and m second location display objects respectively representing m second locations based on M second location data sets. The display modes of the n first location display objects and the m second location display objects differ from each other. The type of location positioning or the number of satellites differs between the first positioning location and the second positioning location.

IPC Classes  ?

• G01S 19/48 - Determining position by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
• G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
• G06Q 10/0833 - Tracking

Abstract

A male rotor of a screw compressor has a cooling flow path extending axially inside a discharge-side shaft portion. A groove structure is provided in at least part of an area between the position of a discharge-side end surface of the male rotor and the attachment position of a discharge-side bearing in the wall surface of the cooling flow path. The groove structure is constituted of axially spaced grooves having a length-directional component in the circumferential direction of the screw rotor. A nozzle of a stationary member is spaced from the wall surface within the cooling flow path. The nozzle is disposed so as to overlap at least part of the groove structure at an axial position.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/04 - Heating; Cooling; Heat insulation

Abstract

Provided are a temperature indicator manufacturing system and a temperature indicator manufacturing method that reduce the labor and cost of management associated with temperature indicator manufacturing. This temperature indicator manufacturing system comprises: a marking device 12 that marks, on a base material, a temperature detecting material including a matrix material and a temperature indicating material containing at least a leuco dye, a developer, and a decoloring agent; and an adhesive application device 13 that applies an adhesive onto the temperature detecting material marked on the base material, wherein the adhesive is applied in a state in which the temperature sensing material marked on the base material has solidified, and the adhesive solidifies before the temperature detecting material marked on the base material liquefies.

IPC Classes  ?

• G01K 11/12 - Measuring temperature based on physical or chemical changes not covered by group , , , or using changes in colour, translucency or reflectance
• C09J 11/00 - Features of adhesives not provided for in group , e.g. additives
• C09J 201/00 - Adhesives based on unspecified macromolecular compounds
• G01K 11/16 - Measuring temperature based on physical or chemical changes not covered by group , , , or using changes in colour, translucency or reflectance of organic materials

Abstract

Provided is a cubicle in which measures against temperature rise can be more efficiently taken while reducing heat intrusion from the outer surface due to the radiation of the Sun. This cubicle comprises: a box 10 for housing power receiving and transforming equipment; a door 20 with which the box is provided; a side plate 40 with which a side portion of the box is provided; and light shielding plates 22, 42 attached to the door and the side plate and preventing direct sunlight. The light shielding plates 22, 42 are tilted and attached so that the distance between the light shielding plates 22, 42 and the wall surface widens at an upper portion as compared with that at a lower portion, thereby facilitating the flow of air toward the upper portion.

IPC Classes  ?

• H02B 3/00 - Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
• H02B 1/30 - Cabinet-type casings; Parts thereof or accessories therefor
• H02B 1/56 - Cooling; Ventilation
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

In this compressor system, comprising a plurality of compressors and a compressor control device that controls the operation of the plurality of compressors, each of the compressors includes a filter that filters air, a compressor body that compresses air, and a detection means that detects a physical quantity correlated with the pressure loss of the compressor body. The compressor control device preferentially operates compressors having a higher power efficiency according to the physical quantity detected by the detection means among the plurality of compressors, and restricts the operation of compressors having a lower power efficiency.

IPC Classes  ?

• F04B 49/06 - Control using electricity

Abstract

A monitoring apparatus includes: an input unit that accepts equipment identifying information for identifying monitoring object equipment and an analysis purpose; and an output unit that, when analysis item data corresponding to the analysis purpose among operation data indicating an operating status of the identified monitoring object equipment is a value within a specified range on the basis of the equipment identifying information and the analysis purpose which have been input, outputs a tendency of the analysis item data compared with predetermined comparison item data. According to the above-described configuration, the status of the monitoring object equipment can be diagnosed and visualized for the sake of the condition based maintenance to perform maintenance in accordance with the status of each equipment.

IPC Classes  ?

• G06F 11/07 - Responding to the occurrence of a fault, e.g. fault tolerance

Abstract

Provided is a crane device with which it is possible for the workload involved in setting action information to decrease when general-purpose inverters are used, and with which it is moreover possible to easily confirm the action information.　A crane device comprising a plurality of driving electric motors including at least a winding electric motor (3) and a movement electric motor (5), general-purpose inverters (16, 17) for controlling each of the driving electric motors, and a higher-level control means (30) that is connected to each of the inverters via a communication unit and that controls the inverters, wherein the higher-level control means (30) is provided with an action information conversion means (32) for converting action information so as to correspond to action information of each of the inverters.

IPC Classes  ?

• B66D 1/46 - Control devices non-automatic electric
• B66C 13/00 - Other constructional features or details
• B66C 13/46 - Position indicators for suspended loads or for crane elements

Abstract

Provided is a power conversion device which comprises a main circuit board, a first board, and a second board and which has a reduced size. The main circuit board has a rectifier circuit and an inverter circuit which are disposed in a high-power section, the rectifier circuit rectifying AC voltage and The second board is provided with a The first board is connected to the main circuit board and to the second board, and is provided with: a first circuit disposed in a low-power section. The second board is provided with a second circuit disposed in a low-power section. section from each other in a reinforced manner; an insulating transformer disposed in the reinforced insulation region and constituting a constituent component of a power supply circuit for receiving the DC voltage and supplying power to the first circuit and to the second circuit; and an insulating element disposed in the reinforced insulation region and allowing a signal to be exchanged between the first circuit and the second circuit.

IPC Classes  ?

• H02M 7/00 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
• 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
• H05K 1/02 - Printed circuits - Details
• H05K 1/14 - Structural association of two or more printed circuits

Abstract

The present invention provides an inkjet recording device capable of automatically cleaning the head tip and a cleaning method for inkjet recording apparatus. The present invention provides an inkjet recording device capable of automatically cleaning the head tip and a cleaning method for inkjet recording apparatus. An inkjet recording apparatus has a printhead that receives a supply of ink and prints, a main unit that supplies said ink to said printhead, and a cleaning unit that has a cleaning tank into which said entire printhead is inserted and injects a cleaning solution from a cleaning nozzle to said printhead for cleaning. The cleaning unit has a cleaning nozzle that sprays cleaning liquid into the cleaning tank and a cleaning base section that has a housing section that accommodates the tip of the printhead and allows said cleaning liquid to flow into the housing section. The cleaning liquid is allowed to flow into the housing section to clean the tip of the printhead.

IPC Classes  ?

• B41J 2/165 - Prevention of nozzle clogging, e.g. cleaning, capping or moistening for nozzles

Abstract

The present invention prints, on a printing target, prescribed information constituted by dots formed by ink discharged onto the printing target, images the prescribed information, and detects a print area from the image in which the prescribed information was captured. A reference position grid is generated provided with dots serving as references for inspecting impact positions of the dots in each dot area obtained by dividing the print area into prescribed dot areas. The impact positions are inspected and read on the basis of a superimposed image obtained by superimposing the print area and the reference position grid, and a determination grade reference table for determining the degree of deviation of the impact positions of the dots relative to the positions of the dots serving as the references. A feedback signal for correcting the impact positions is generated on the basis of the inspection result and correction data for defining a correction amount of the dots constituting the print area determined in accordance with the degree of deviation. The feedback signal is output to an inkjet printer, and ink is discharged onto the printing target on the basis of the corrected impact positions of the dots obtained from the feedback signal.

IPC Classes  ?

• B41J 2/01 - Ink jet
• B41J 2/06 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
• B41J 2/12 - Ink jet characterised by jet control testing or correcting charge or deflection

Abstract

This rotating electric machine comprises: a rotor (200); a stator core (110) having slots (111) provided with opening portions (112) on the rotor (200) side; bobbins (150) into which coils (140) fit in the slots (111) are inserted; projection portions (152) provided on the opening portion (112) side of the bobbins (150); and a resin (160) for fixing the stator core (110), the coils (140), and the bobbins (150).

IPC Classes  ?

• H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation

Abstract

A capacitance acquisition unit acquires a plurality of initial capacitance values representing capacitance values of a smoothing capacitor in the initial state, and acquires a plurality of operating capacitance values representing capacitance values of the smoothing capacitor in the operating state, and a degradation-determining unit acquires characteristic information representing the relationship between AC power and the capacitance value of the smoothing capacitor in the initial state on the basis of statistics of the plurality of initial capacitance values acquired by the capacitance acquisition unit, and determines the degradation state of the smoothing capacitor on the basis of the statistics of the plurality of operating capacitance values acquired by the capacitance acquisition unit, and the characteristic information.

IPC Classes  ?

• H02M 7/48 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

This inkjet recording device can calculate the time at which a cartridge replacement indication and an ink or solvent replenishment indication are displayed, and can notify a user of an estimated time at which the replenishment of ink or solvent is needed. The inkjet recording device is structured to provide control to: calculate the consumption amount of ink or solvent per time from information on printing contents or the number of times of printing performed per time in the past, and operating information on a pump and an electromagnetic valve; divide the remaining amount of ink or solvent by the consumption amount of ink or solvent per time; and estimate in advance the time before an ink or solvent replenish indication is issued.

IPC Classes  ?

• B41J 2/175 - Ink supply systems
• B41J 2/01 - Ink jet
• B41J 2/02 - Ink jet characterised by the jet generation process generating a continuous ink jet

Abstract

The purpose of the present invention is to provide a power conversion device capable of suppressing an increase in current flowing through a motor even if a voltage command exceeds the amplitude of a carrier wave. To achieve the above purpose, a power conversion device, which controls the drive of a three-phase motor by converting a DC voltage into a voltage command-based voltage through the operation of a switching circuit, comprises: a DC voltage detector which detects a DC voltage; a norm generator which generates a voltage command norm from the voltage command; a modulated wave generator which generates a first modulated wave from the detected DC voltage and the voltage command norm; and a control signal generator which generates a control signal for controlling the operation of the switching circuit from the first modulated wave and the carrier wave, wherein the modulated wave generator generates, for one phase at the timing of the maximum or minimum value of the voltage command, a first modulated wave having a magnitude of 1/2 of the detected DC voltage, and generates, for the remaining two phases, a first modulated wave having a magnitude based on the detected DC voltage and voltage command norm.

IPC Classes  ?

• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
• 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

Abstract

The present invention provides a liquid feed type gas compressor that makes it possible to minimize the discharge side temperature of a compressor body during restart.　An oil feed type air compressor 1 comprises: a compressor body 3 that is driven by an electric motor 2; a separator 6 that separates oil from compressed air which has been discharged from the compressor body 3; an oil supply system 8 that supplies, to an operation chamber of the compressor body 3, the oil which has been separated by the separator 6; an oil cooler 15 that is provided in the oil supply system 8 and that uses cooling airflow which has been generated by the cooling fan 13 to cool oil; and a control device 9. The control device 9 stops the electric motor 2 and the cooling fan 13 when the duration of load-free operation reaches a prescribed value. On the basis of the detection history of a discharge side pressure sensor 14, a resumption timing at which the electric motor 2 is restarted is predicted, and the discharge side temperature of the compressor body 3 at the resumption timing is predicted. When the predicted discharge side temperature exceeds a prescribed allowable value, the cooling fan 13 is restarted before the electric motor 2.

IPC Classes  ?

• F04B 49/02 - Stopping, starting, unloading or idling control
• F04B 39/06 - Cooling; Heating; Prevention of freezing

Abstract

The purpose of the present invention is to optimize the cleaning and replacement frequency of a compressed air pre-filter and a cooling air pre-filter.　To achieve said purpose, this gas compressor comprises: an intake filter in which a compressed air pre-filter that primarily removes dust is disposed in an intake port for compressed air in a housing, and that further secondarily removes dust; at least one compressor main body that suctions air through the intake filter and an intake passage and compresses the air; a motor that drives the compressor main body; an air cooler that cools the compressed air; a cooling fan that passes cooling air to the air cooler; a cooling air intake port that suctions from outside air with the cooling fan; a cooling air pre-filter provided to the cooling air intake port; and a control device that controls the operation of the compressor. The control device determines the cleaning and replacement frequency of the compressed air pre-filter and the cooling air pre-filter on the basis of a load factor serving as an indicator of an operating state.

IPC Classes  ?

• F04B 39/16 - Filtration; Moisture separation
• F04B 41/00 - Pumping installations or systems specially adapted for elastic fluids

Abstract

This power conversion device has: a main breaker and a main electromagnetic contactor connected to a main power supply; a converter body having a switching element; a power supply-side reactor and a device body-side reactor connected to the main electromagnetic contactor; a current detector; a smoothing capacitor; a DC voltage detector that detects a voltage of the smoothing capacitor; a control unit; and accessories. The accessories have: a power-supply phase detection transformer that detects the phase and the amplitude of a power supply voltage; a current limiting resistor that suppresses rush current to the smoothing capacitor at an initial turning-on stage of the main power supply; an electromagnetic contactor which is for turning on current limiting operation and which connects the current limiting resistor and the main power supply; and a filter circuit that removes current ripples caused by switching of the switching element. The main breaker, the main electromagnetic contactor, and an input terminal of the power-supply phase detection transformer in the accessories are connected to one another. The power supply-side reactor, the device body-side reactor, and a filter terminal in the accessories are connected to one another.

IPC Classes  ?

• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
• H02M 1/36 - Means for starting or stopping converters
• H02M 1/14 - Arrangements for reducing ripples from dc input or output

Abstract

Provided is a compressor including a sliding material with the wear resistance improved. To solve this problem, a compressor (40) includes: a compression chamber (43) that is formed in a cylinder (41) and compresses gas; and a piston ring 421 and a rider ring 422 that are in contact with the inner wall of the cylinder 41 to form the compression chamber (43). The piston ring 421 and rider ring 422 include: a resin member; and a metal particle that is located within the resin member and includes a surface layer containing an affinity portion having an affinity to the resin member.

IPC Classes  ?

• F04B 39/00 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups
• F16J 9/26 - Piston-rings, seats therefor; Ring sealings of similar construction in general characterised by the use of particular materials

Abstract

This invention provides an ink for inkjet printers with both properties; i.e., good visibility of printing dots after heating and high dissolution stability. The ink for inkjet printers of the invention comprises a color material, a solvent, and resin, wherein the color material comprises a first metal complex and a second metal complex comprising metal ions selected from among iron ions, manganese ions, copper ions, cobalt ions, and chromium ions and ligands bound thereto, and the ligands comprise diketone structures incorporated in the chemical structures thereof.

IPC Classes  ?

• C09D 11/32 - Inkjet printing inks characterised by colouring agents

Abstract

The objective of the present invention is to provide a scroll type fluid machine with which it is possible to improve the sealing properties of an operating chamber.　A scroll type compressor is provided with: a fixed scroll 11 having an end plate 15 and a spiral wrap 16 provided upright on the end plate 15; an orbiting scroll 12 having an end plate 20 and a spiral wrap 21 provided upright on the end plate 20; a drive shaft 13 for causing the orbiting scroll 12 to orbit with respect to the fixed scroll 12; a tip seal 29 inserted into a seal groove 28 formed in the wrap 16 having the smaller spiral radius; and a tip seal 31 inserted into a seal groove 30 formed in the wrap 21 having the larger spiral radius. The tip seal 29 has a plurality of inside lips 36 formed on an inside surface 33, and a plurality of outside lips 37 formed on an outside surface 34.

IPC Classes  ?

• F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Abstract

According to the present invention, a communication device management server calculates a transmission period correction value for each group on the basis of the amount of data used, and distributes the transmission period correction value to a communication device. The communication device corrects and updates a data collection period for each group on the basis of the transmission period correction value, and collects data from subordinate equipment on the basis of the updated data collection period obtained by the correction.

IPC Classes  ?

• H04W 24/02 - Arrangements for optimising operational condition
• H04L 67/00 - Network arrangements or protocols for supporting network services or applications
• H04M 11/00 - Telephonic communication systems specially adapted for combination with other electrical systems
• H04W 8/22 - Processing or transfer of terminal data, e.g. status or physical capabilities
• H04W 24/10 - Scheduling measurement reports

Abstract

A liquid supply type screw compressor that can suppress a rise in temperature of a liquid while reducing work for stirring the liquid is provided. The liquid supply type screw compressor has a male rotor 11A and a female rotor 11B, male-rotor-side working chambers formed at grooves of the male rotor 11A, and female-rotor-side working chambers formed at grooves of the female rotor 11B. In addition, the liquid supply type screw compressor has: a liquid supply nozzle 28 that is arranged on one side in the rotor axial direction which is a low-pressure side of an intersection P at which a high-pressure-side cusp 23 intersects a ridge line L of a trailing lobe tip of the female rotor 11B that defines a female-rotor-side working chamber V5 immediately after a start of delivery, the liquid supply nozzle 28 supplying the liquid to the male-rotor-side working chamber; and a liquid supply nozzle 29 that is arranged on the other side in the rotor axial direction which is a high-pressure side of the intersection P, and supplies the liquid to the male-rotor-side working chamber, and the liquid supply amount of the liquid supply nozzle 29 is made greater than the liquid supply amount of the liquid supply nozzle 28.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/02 - Lubrication; Lubricant separation 
• F04C 29/04 - Heating; Cooling; Heat insulation

Abstract

A housing configuration includes a filter chamber having a purifying filter, a rear chamber in the back, and a fan chamber having a fan. In this housing configuration, a measurement port for purifying filter performance evaluation is provided in a substantially middle portion of the rear chamber, and a connecting portion connected to the measurement port and a cover for maintenance work are provided on the front surface of the housing. Provided as a result is an air purifying negative pressure device that is compact in configuration, can be installed with ease, and is capable of improving both the accuracy of an air purifying filter performance evaluation test and the workability of routine maintenance.

IPC Classes  ?

• F24F 8/108 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
• F24F 13/28 - Arrangement or mounting of filters

Abstract

Provided is a vacuum circuit breaker comprising a plurality of main circuit opening/closing parts, an operation mechanism part, a link mechanism part, and an operation panel, wherein: the link mechanism part is provided with a connecting arm (17) which is connected to the plurality of main circuit opening/closing parts and a link mechanism which is connected to the connecting arm (17); the operation mechanism part is provided with a mechanism part lever (321) which is connected to the connecting arm (17) via the link mechanism; and, by changing the position of the link mechanism that is connected to the mechanism part lever (321), it is possible, using the same operation mechanism part, to handle both a case in which the connecting arm (17) is disposed orthogonally to the operation panel and a case where the connecting arm (17) is disposed parallel to the operation panel.

IPC Classes  ?

• H01H 3/46 - Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
• H01H 33/42 - Driving mechanisms
• H01H 33/666 - Operating arrangements

Abstract

An inkjet recording device which is capable of preventing ink from being deposited while inactive, and also capable of adjusting the viscosity of the ink to a suitable range when the viscosity of the ink inside a main ink container deviates from a suitable viscosity range. The present invention is configured in a manner such that the process of supplying a solvent stored in a solvent container to a printing head and returning the same to an ink container via a circulation pathway and a collection pathway by controlling the printing head and a main body is repeated for each fixed time period when not actively printing by the printing head, wherein some of the ink stored in the ink container is discarded to the interior of the head-mounting unit from the printing head via a supply pathway and the viscosity of ink stored inside the ink container is reduced by supplying the solvent stored in the solvent container to the ink container while in a state in which the printing head is mounted to the head-mounting unit, when the viscosity of the ink measured by a viscosity measurement unit is higher than a pre-set prescribed range.

IPC Classes  ?

• B41J 2/195 - Ink jet characterised by ink handling for monitoring ink quality
• B41J 2/01 - Ink jet
• B41J 2/165 - Prevention of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
• B41J 2/18 - Ink recirculation systems

Abstract

This oil feeding type compressor is provided with: a compressor body (2) that compresses gas while pouring oil; a first oil separator (6) that separates oil from the compressed gas that has been ejected from the compressor body (2); a second oil separator (8) that further separates oil from the compressed gas from which the oil has been separated by the first oil separator (6), and that has a storage unit (8bd) to store the separated oil; an ejection pipe system (9) through which the compressed gas from which the oil has been separated by the second oil separator (8) flows; an oil discharging path (10) that discharges the oil stored in the storage unit (8bd) from the storage unit (8bd); a valve body (10a) that is provided in the oil discharging path (10); and a control unit (11) that controls the degree of opening of the valve body (10a) on the basis of time.

IPC Classes  ?

• F04B 49/06 - Control using electricity
• F04B 49/10 - Other safety measures
• F04C 29/02 - Lubrication; Lubricant separation 

Abstract

In the operation of a refueling screw compressor, when load conditions constantly fluctuate or when the rotation speed control of a cooling fan is performed, it is difficult to accurately perform a diagnosis predicted from measurement results of devices inside the compressor, so a diagnostic mode stably creates an operating condition under which an accurate diagnosis can be performed. In the refueling screw compressor, a discharge electric valve is provided downstream of an air cooler, and an air release electric valve and a dedicated orifice are provided to connect an oil separator inner space and a suction throttle valve space. In the diagnostic mode, the discharge electric valve is closed, the air release electric valve is opened, and while an upstream pressure of the oil separator is maintained at a specified pressure, a rotation speed control operation of a compressor body and the diagnosis of internal devices are performed.

IPC Classes  ?

• F04C 28/28 - Safety arrangements; Monitoring
• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

Provided is a diagnostic system for a transformer having insulating oil and windings, the diagnostic system for a transformer comprising: a detection unit that detects the temperature and hydrogen at the upper and lower portions of the insulating oil; and a calculation unit that determines an abnormality, on the basis of detection values from the detection unit.

IPC Classes  ?

• H01F 27/00 - MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - Details of transformers or inductances, in general

Abstract

This vacuum circuit breaker comprises a main circuit switching unit, an operating mechanism unit, and a link mechanism unit, wherein: the operating mechanism unit has a mechanism part that operates the switching of electrodes of the main circuit switching unit via the link mechanism unit; grease is applied, as a lubricant, to gaps between some moving sections of the mechanism part and pins that axially support said some moving sections, among gaps between moving sections of the mechanism part and pins that axially support the moving sections; a coating material is applied, as a lubricant, to gaps between other moving sections and pins that axially support said other moving sections, among the gaps between the moving sections of the mechanism part and the pins that axially support the moving sections; and as a result, lubricant performance can be maintained over a long period without requiring injection of the lubricant.

IPC Classes  ?

• H01H 33/42 - Driving mechanisms
• H01H 33/666 - Operating arrangements

Abstract

A power control device for executing power control on a plurality of power networks including an own-end power network and at least one other-end power network on the same electric power system, each network comprising a DC power source, a power conversion unit, a switch unit that shuts off power supply to each load, and a voltage measurement unit and a current measurement unit that measure an output from the power conversion unit. The power control device comprises: a storage unit that stores characteristic information of the power conversion unit and shut-off order information of the switch unit; and a load shut-off control unit that, when an overload has been determined on the basis of active power and the characteristic information, determines to shut off the switch unit in the own-end power network, on the basis of the number of shut-offs of the switch unit in the other-end power network detected on the basis of a voltage value or a current value, and the shut-off order information.

IPC Classes  ?

• H02J 3/14 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• 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

Abstract

This motor control device receives a speed command from an upper layer system control device having a position controller, the motor control device having: a position command estimator that calculates an estimate of a position command on the basis of the speed command and a motor axis position response; and a speed command generator that generates an actual speed command on the basis of the estimate so that an end section of a machine connected to the motor does not oscillate, wherein the actual speed command is output from the speed command generator to a speed controller.

IPC Classes  ?

• H02P 23/04 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for damping motor oscillations, e.g. for reducing hunting
• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage

Abstract

A scroll compressor is provided that can prevent liquid from being accumulated with a simple structure. A scroll compressor is provided that can prevent liquid from being accumulated with a simple structure. The scroll compressor includes: a fixed scroll 11; an orbiting scroll 12; and a rotation shaft 13 that extends in the horizontal direction and causes the orbiting scroll 12 to orbit relative to the fixed scroll 11, and liquid is injected to a working chamber at an intake process or to the upstream side thereof. An enclosing point P of a working chamber formed near the outer end of a fixed wrap 16 of the fixed scroll 11 is positioned below a center O of the rotation shaft 13 and at the lowest point of the contour of the working chamber having shifted to the lowest position. The fixed scroll 11 has an inclined wall surface 33 that is positioned below the center 0 of the rotation shaft 13, is made to face upward, and extends from the dust wrap 17 to the outer end of the fixed wrap 16. The inclined wall surface 33 is formed so as to be sloped down gradually from the dust wrap 17 toward the outer end of the fixed wrap 16.

IPC Classes  ?

• F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Abstract

This gas-insulated switchgear equipped with a plurality of containers filled with insulated gas comprises: a high-voltage body; an insulation spacer disposed between the containers; and a fixing part that fixes the insulation spacer. The fixing part has a plurality of members different in thickness, in which a thin member is disposed at a portion for securing an insulation distance from the high-voltage body.

IPC Classes  ?

• H02B 13/02 - Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
• H02B 13/035 - Gas-insulated switchgear
• H02B 13/045 - Gas-insulated switchgear - Details of casing, e.g. gas tightness

Abstract

Provided is a gas-insulated switching device capable of suppressing increase of voltage between an arc shield of a vacuum circuit breaker and a contact electrode which is a voltage applying part, by raising an electrical potential of the arc shield.　In the gas-insulated switching device configured such that the vacuum circuit breaker is insulatingly supported in a grounding container, an arc-shield voltage-adjustment conductor (23) formed of a conductive material is disposed such that one end is electrically connected to a high-voltage conductor (12C) which is a power supply of the vacuum circuit breaker, and the other end is positioned in the vicinity of the vacuum circuit breaker (11) with a predetermined spatial distance (D) therebetween.

IPC Classes  ?

• H01H 33/662 - Housings or protective screens
• H02B 13/035 - Gas-insulated switchgear

Abstract

It is provided a communication device which transfers a signal, comprising: an arithmetic device configured to execute predetermined processing; a storage device accessible from the arithmetic device; a log collection module configured to collect first type logs from at least one of the communication device or an equipment coupled to the communication device; an alert generation module configured to generate alert when one of the collected the first type logs satisfies a predetermined condition; and a failure cause candidate determination module configured to determine failure cause candidates in response to the generated alert, and output, to the log collection module, an additional log collection request for collecting second type logs in an additional log collection order that is set based on the determined failure cause candidates.

IPC Classes  ?

• H04L 41/0654 - Management of faults, events, alarms or notifications using network fault recovery
• H04L 41/069 - Management of faults, events, alarms or notifications using logs of notifications; Post-processing of notifications
• H04L 41/0681 - Configuration of triggering conditions

Abstract

Provided is an inkjet recording device capable of automatically determining an optimum excitation voltage of a piezoelectric element for forming ink liquid droplets.　An excitation voltage value is applied in a plurality of sweeping events to a piezoelectric element of a nozzle (8) without energizing a deflection electrode so as to sweep from a high-voltage side to a low-voltage side in a prescribed voltage range (S11 to S15). Ink droplets generated at the applied excitation voltage value is given electric charge by applying a charge voltage thereto in a plurality of arbitrary printing phases. A charge amount given to the ink liquid droplets is detected by a charge amount sensor (25) to find a printing phase. If the relationship of a current printing phase to a previous printing phase detected for each sweeping event inverts from the increase side to the decrease side, and a decrease determination of the printing phase is established twice in a row (S16), an excitation voltage value corresponding to the printing phase of the sweeping event immediately before the first decrease determination is recognized as a final excitation voltage value (S17).

IPC Classes  ?

• B41J 2/025 - Ink jet characterised by the jet generation process generating a continuous ink jet by vibration
• B41J 2/01 - Ink jet
• B41J 2/085 - Charge means, e.g. electrodes
• B41J 2/09 - Deflection means

Abstract

Provided is a servo system and a control method for a servo system that suppress a rise in costs and has a high reliability.　The servo system has a servo motor, an encoder for detecting rotary information of the position and speed of the servo motor, and a servo amplifier for driving and controlling the servo motor using the rotary information. The servo amplifier includes an encoder communication interface constituted by hardware, a processor for calculating a control command to control the servo motor on the basis of an operation command and rotary information input via the encoder communication interface, and a control unit for driving and controlling the servo motor on the basis of the control command.　The processor is configured to compare the rotary information directly received from the encoder with the rotary information input via the hardware communication interface, compare both sets of rotary information, and when the information does not match, diagnose a malfunction.

IPC Classes  ?

• H02P 29/024 - Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load

Abstract

A scroll type gas machine that can suppress wear of tip seals is provided. The scroll type compressor includes: a fixed scroll 11 having a helical wrap 16; an orbiting scroll 12 having a helical wrap 21; a drive shaft 13 that causes the orbiting scroll 12 to orbit relative to the fixed scroll 11; and a helical tip seal 29A inserted into a seal groove 28A of the wrap 21. The tip seal 29A has: a groove 36A that has an opening at a central portion of a sliding surface 30 in the seal width direction; and a communication groove 37A that establishes communication between the inside of the groove 36A and a working chamber SH on the inner side in the wrap width direction. The groove 36A is provided in a range where the differential pressure (PH−PL) is equal to or higher than 0.1 Mpa between the working chamber SH on the inner side in the wrap width direction and a working chamber SL on the outer side in the wrap width direction. The communication groove 37A is shorter than the groove 36A in the seal extension direction.

IPC Classes  ?

• F04C 27/00 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
• F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Abstract

A device for assisting in assigning setting values of a compressor operation controller for starting or stopping one or more compressors, collecting discharged air of the compressors in an air tank, and supplying the air tank as a compressed air source in a predetermined pressure range, includes: an input unit that receives piping network information which is an element of a pressure loss of a piping flow from the compressor to a pressure control position of the controller, compressor specifications which are an upper limit of a discharge pressure of the compressor and a number of compressor starts/stops, a supply flow rate condition which is time change data of a flow rate flowing from the pressure control position of the controller, and a supply pressure condition which is a lower limit of the supply pressure at the pressure control position of the controller.

IPC Classes  ?

• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors

Abstract

A power conversion system 200 includes a power conversion device 2 configured to supply electric power to a motor 3 and a power supply device 1 configured to supply electric power to the power conversion device 2. The power conversion device 2 includes a reverse converter 7 configured to convert the electric power, a control circuit 8 configured to control the reverse converter 7, and a current detector configured to detect a current flowing through the reverse converter 7. The power supply device 1 includes a storage device 6 configured to store electric power in accordance with a voltage, a step-up/down power supply circuit 5 configured to change the voltage of the storage device 6 based on a voltage command, and a voltage command computing circuit 15 configured to compute the energy stored in the storage device 6 and output it as the voltage command to the step-up/down power supply circuit 5. The control circuit 8 calculates powered drive energy of the motor 3 by using information from the motor 3 and a current value detected by the current detector. The voltage command computing circuit 15 computes the energy stored in the storage device 6 based on the powered drive energy calculated by the control circuit 8. When it is determined that the characteristics of the motor 3 are restricted, the voltage command computing circuit 15 temporarily changes the voltage command to improve the motor characteristics.

IPC Classes  ?

• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
• H02P 21/18 - Estimation of position or speed
• H02P 21/20 - Estimation of torque

Abstract

A fine particle measuring device performing fine particle measurement includes a particle probe, a pipe connected to the particle probe, and a particle counter connected to the pipe. A cylindrical pipe is disposed on an outer periphery of the pipe and an air flow path is provided between the pipe and the cylindrical pipe.

IPC Classes  ?

• G01N 15/14 - Electro-optical investigation

Abstract

A communication module includes a plurality of communication interfaces that support a plurality of different types of communication interface standards to implement a general-purpose communication module that enables data communication not depending on types of equipment. A plurality of programs to be executed in the communication module include a first app to be executed on an OS (Operating System) and one or a plurality of second apps to be executed on the OS. Each of one or more second apps is an app that performs communication in accordance with one or more types of communication protocol on one or more communication interface standards and is an app that can be arbitrarily installed and arbitrarily uninstalled. The first app is an app as middleware between the OS and the one or the plurality of second apps.

IPC Classes  ?

• H04M 15/00 - Arrangements for metering, time-control or time-indication
• H04L 67/00 - Network arrangements or protocols for supporting network services or applications
• H04L 41/0823 - Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability

Abstract

This inventory management system comprises: a management unit which manages, for each predetermined group of consumables, the number of consumables in stock used in each of a plurality of devices; an acquisition unit which acquires, from each of the plurality of devices, consumables information regarding the degree of wear and tear of consumables used in the device; and a determination unit which determines, from the consumables information acquired by the acquisition unit, whether or not there are consumables that require replacement. If consumables determined by the determination unit to require replacement have been replaced, the management unit updates the number in stock for the groups to which these consumables belong accordingly.

IPC Classes  ?

• G06Q 10/08 - Logistics, e.g. warehousing, loading or distribution; Inventory or stock management

Abstract

Provided is a device abnormality diagnosis method with which it is possible to diagnose a device abnormality correctly even when past sound measurement data is unavailable. This device abnormality diagnosis method is provided for diagnosing a device 1 using a terminal device 4. The terminal device 4 includes an imaging means 42, a sound collecting means 43A, a display means 41, and an input means 41, and involves the following: a step for displaying candidates of the device 1 on a display means 41; a step for specifying the device 1 from the displayed candidates of the device 1 by input from an operator 2; a step for displaying, on the display means 41, an imaging screen with a guide 11 corresponding to the specified device 1; a step for adjusting the position of the terminal device 4 according to the guide 11 to display an image of the device 1 on the display means 41, and obtaining an image and sound of the device 1 using the imaging means 42 and a sound collecting means 43A; and a step for diagnosing the status of the device 1 using information of the obtained image and sound of the device 1, and displaying the diagnosis result on the display means 41.

IPC Classes  ?

• G01M 99/00 - Subject matter not provided for in other groups of this subclass
• G01H 17/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass

Abstract

The present invention provides a printed image inspection device in which color information based on environmental changes can be inspected using various convenient inspection procedures.　The present invention pertains to a printed image inspection device which acquires, from an image obtained by capturing an image of a recognition target in which a dot pattern is arranged, color information for dot portions of the image, and outputs a determination result based on this color information, said inspection device having: an image input unit (31) which imports the image obtained by capturing an image of the recognition target including the dot pattern; a dot pattern recognition unit (34A) which determines matching with a pre-specified reference dot pattern; a color information acquisition unit (34B) which acquires color information from pixel data of the dot portions of the image; a correlation calculation unit (34C) which calculates the correlation between the color information data and pre-set ink reference color information data; and an ink state determination unit (34D) which determines an ink state of the recognition target on the basis of the correlation from the correlation calculation unit.

IPC Classes  ?

• B41J 29/393 - Devices for controlling or analysing the entire machine
• B41J 2/01 - Ink jet
• B41J 2/08 - Ink jet characterised by jet control for many-valued deflection charge-control type
• B41J 2/195 - Ink jet characterised by ink handling for monitoring ink quality
• B41J 3/407 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
• C09K 9/00 - Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
• C09K 9/02 - Organic tenebrescent materials
• G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined

Abstract

The present invention is a motor control device included in a position control system for performing position control of a machine end connected to a motor. The motor control device is built into the position control system so as to receive a first speed command from an upper-level control device and output a position response of a motor shaft to the upper-level control device and has a speed controller and an intra-speed-control-system damping controller. The intra-speed-control-system damping controller has: a position command estimator for calculating an estimation value of a position command on the basis of the first speed command and the position response of the motor shaft; a parallel damping controller that extracts, on the basis of the estimation value of the position command, a frequency component exciting the vibration of the machine end, said frequency component being included in the first speed command, and that outputs the extracted frequency component; a phase adjuster for improving a response delay generated due to the parallel damping controller; a first unit converter for converting an output of the phase adjuster to the dimension of speed; and a computing unit. The computing unit subtracts the output of the parallel damping controller from the first speed command to remove, from the first speed command, the frequency component exciting the vibration of the machine end, outputs the result as a second speed command, outputs a first actual speed command as an output of the intra-speed-control-system damping controller on the basis of an output of the first unit converter and the second speed command, and sets the first actual speed command as a command of the speed controller.

IPC Classes  ?

• H02P 23/04 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for damping motor oscillations, e.g. for reducing hunting
• H02P 29/00 - Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors

Abstract

This power conversion device has a power converter for outputting, to a magnet motor, a signal that makes the output frequency, output voltage, and output current of the magnet motor variable and a control unit for controlling the power converter, wherein the control unit calculates a gain of a q-axis magnetic flux component that changes in accordance with the phase of the magnet motor and calculates a command value of a d-axis induced voltage on the basis of the setting value of an induced voltage coefficient, a frequency estimation value or a frequency command value, and the gain of the q-axis magnetic flux component.

IPC Classes  ?

• H02P 6/10 - Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
• H02P 21/26 - Rotor flux based control

Abstract

Provided are a deterioration diagnosis device and deterioration diagnosis method that make it possible to carry out accurate deterioration diagnosis that takes into consideration not only vibration quantity but also other vibration factors such as vibration period. This deterioration diagnosis device is provided separately from or so as to be integrated with an electric motor control device comprising a power converter for outputting power for driving an electric motor connected to a device to be driven, a position controller for outputting a speed command value corresponding to the deviation between a position command value and an electric motor position detection value, a speed controller for outputting a torque current command value corresponding to the deviation between the speed command value and an electric motor speed detection value, and a current controller for adjusting the output current of the power converter according to the deviation between the torque current command value and a detection value for the torque current supplied to the electric motor. The deterioration diagnosis device comprises a deterioration diagnosis unit for carrying out electric motor deterioration diagnosis corresponding to electric motor driving information and a vibration information storage device for storing the diagnosis results of the deterioration diagnosis unit. The deterioration diagnosis unit stores a plurality of types of information relating to the electric motor vibration state that have been calculated from the driving information in the vibration information storage device and determines that vibration has occurred if the information relating to the vibration state of the electric motor is larger than a prescribed threshold.

IPC Classes  ?

• G01M 99/00 - Subject matter not provided for in other groups of this subclass

Abstract

This electric motor control device comprises: a converter unit which converts an AC voltage into a DC voltage; an inverter unit which converts the DC voltage from the converter unit into an AC voltage, and supplies the AC voltage to an electric motor; an inverter control unit which controls the inverter unit; an electric current detection unit which detects an electric current flowing through the electric motor; and an electric power calculation unit which estimates the temperature of the electric motor from the detected current, calculates the resistance value of the electric motor from the estimated temperature, and calculates copper loss from the calculated resistance value.

IPC Classes  ?

• H02P 29/64 - Controlling or determining the temperature of the winding
• H02P 29/024 - Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load

Abstract

A delivery port of a rotary-screw compressor includes: a first opening having a profile configured to interrupt communication with a second working chamber of a suction process that opens only in the axial direction; a second opening connected to the first opening; and a third opening connected to the first opening and the second opening. The profile of the first opening includes: a first profile line that forms one of a pair of lateral edges of a lingulate protrusion configured to close off the second working chamber and extends toward a reference point; a second profile line that forms another one of the pair of the lateral edges of the protrusion; a third profile line that extends toward the reference point along the root circle of the female rotor; and a second connection line that connects the first profile line with the second profile line. The second opening is a first groove that opens into the first opening at the second connection line and extends toward a reference line. The third opening is a second groove that opens into the first groove and extends in an open state along the first profile line.

IPC Classes  ?

• F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

This safety cabinet has a front shutter and a front opening inside a work chamber and supplies clean air to the inside of the work chamber from above. A lateral surface slit is formed in a lateral surface inside the work chamber. Air drawn in through said lateral surface slit is converged with a flow path for air drawn in through a front surface grille of a work table that forms a bottom surface inside the work chamber, whereby it becomes possible to prevent turbulence of airflow even in the case where a device is installed inside the work chamber.

IPC Classes  ?

• B01L 1/00 - Enclosures; Chambers
• C12M 1/00 - Apparatus for enzymology or microbiology

Abstract

The purpose of the present invention is to propose a laser marking system that can be operated at a high speed comparable to that achieved for two-dimensional printing patterns, while minimizing the output level of a beam light source. In a laser marking system according to the present invention, a laser beam is one-dimensionally stretched, and modulation is performed on the intensity distribution, in the long axis direction, of a beam spot of the stretched laser beam (see fig. 1).

IPC Classes  ?

• B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
• B23K 26/073 - Shaping the laser spot

Abstract

The present invention provides industrial equipment capable of communicating with an external terminal that can take measures against external attacks without involving complicated authentication and procedures, can reliably connect to the equipment when used by an operator, and can perform, e.g., the checking of the operational status and the operation of the equipment. This industrial equipment includes an electric part (105), a mechanical part (107) driven by the electric part (105), a control unit (103) that controls electric power supplied to the electric part (105), and a communication unit (109) that transmits radio waves and connects the control unit (103) to an external terminal (201) via wireless communication. The control unit (103) causes the communication unit (109) to stop communicating with the external terminal (201) when a connection request is sent from the external terminal (201) to the communication unit (109) more than a predetermined number of times within a predetermined period.

IPC Classes  ?

• H04Q 9/00 - Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
• G06F 21/55 - Detecting local intrusion or implementing counter-measures
• F04B 49/06 - Control using electricity
• F04B 49/10 - Other safety measures

Abstract

To be able to maintain laminar flow with a high wind speed, and suppress contamination caused by the running of a device or the operation of a device by a person as much as possible.　This biosafety cabinet has a front-surface shutter and a front-surface opening in a work chamber, and supplies purified air from above into the work chamber. The safety cabinet is provided with partition plates on the left and right side surfaces and the rear surface of the upper side of the work chamber, and further comprises a partition on the upper front side of the work chamber.

IPC Classes  ?

• B01L 1/00 - Enclosures; Chambers
• C12M 1/00 - Apparatus for enzymology or microbiology

Abstract

The present disclosure enables the provision of a power conversion device comprising a Vienna rectifier that has, for example, reduced switching loss. The power conversion device according to the present disclosure is provided with: an inductor connected to a three-phase system; a three-phase diode bridge connected to a latter stage of the inductor; a capacitor connected in series to two output-side terminals of the three-phase diode bridge; a plurality of bidirectional switches connected between a connection point between the inductor and the three-phase diode bridge, and a connection midpoint of the capacitor; and a controller for controlling switching of the bidirectional switches. The controller has a configuration of comprising, as an operational mode, an ON fixed mode for controlling the switching of the bidirectional switches so as to fix bidirectional switches of the phase where an input voltage has a maximum absolute value out of the phases of a three-phase alternating current voltage to an ON state in all or a part of the period where the absolute value is at the maximum.

IPC Classes  ?

• 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

Abstract

This screw compressor for compressing a working medium is provided with: first and second screw rotors that suction in, compress, and discharge the working medium; a first bearing that rotatably supports one end side of the first screw motor, the one end side being connected to a rotating shaft of a power source; a casing in which the first screw rotor and the first bearing are stored; a shaft sealing member disposed on the side of the first bearing in the casing opposite from a tooth profile part of the first screw rotor, the shaft sealing member sealing a through-hole of the casing in which is inserted a shaft part of the first screw rotor connected to an output shaft of the power source; a partition wall separating the first bearing and the shaft sealing member from each other in the casing; and a liquid supply path that is provided to the casing and has a first liquid supply port for supplying a lubricating solution to the first bearing, and a second liquid supply port for supplying the lubricating solution to the shaft sealing member.

IPC Classes  ?

• F04C 29/02 - Lubrication; Lubricant separation 
• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

A power conversion device and a press apparatus capable of preventing an excessive current in a DC-link capacitor are provided. The power conversion device 10 includes a voltage-doubling rectifier circuit 12. In the voltage-doubling rectifier circuit 12, in a voltage-doubling rectification mode, a common connection node Nc between two capacitors 102a and 102b is connected to a predetermined node. A current detector circuit 107 detects a switching current (IL) flowing in the switching elements SW1 and SW2, and a current detector circuit 108 detects a load current Ild of a load 15. In a mode switching period from a full-wave rectification mode to a voltage-doubling rectification mode, a controller circuit 110 controls the switching of the switching elements SW1 and SW2, based on the switching current (IL) and the load current Ild.

IPC Classes  ?

• 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 5/44 - 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
• 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 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
• B30B 15/14 - Control arrangements for mechanically-driven presses
• B30B 15/00 - PRESSES IN GENERAL; PRESSES NOT OTHERWISE PROVIDED FOR - Details of, or accessories for, presses; Auxiliary measures in connection with pressing
• B21D 37/00 - Tools as parts of machines covered by this subclass

Abstract

An electric power conversion device has a function of detecting, at low cost and at an early stage, a sign of insulation failure of a transformer or a rotational machine. This electric power conversion device is provided with an inverter circuit and a PWM signal generation unit that makes a comparison between a carrier signal and a voltage command value and generates a PWM signal for driving the inverter circuit. The electric power conversion device feeds and receives electric power through connection to a transformer or a rotational machine provided with a winding wire. The electric power conversion device is provided with: a current sensor that detects a current to be fed to or received from the transformer or the rotational machine; and a diagnostic unit that diagnoses insulation degradation of the transformer or the rotational machine.

IPC Classes  ?

• G01R 31/12 - Testing dielectric strength or breakdown voltage
• H02M 7/5387 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
• H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion

Abstract

A motive power transmission mechanism management device 3 is for managing a motive power transmission mechanism that transmits, to a load-side device 70, motive power of an electric motor 4 in an industrial apparatus system 1 in which a plurality of industrial apparatuses are operated in cooperation with each other. The motive power transmission mechanism management device is provided with: a motion control unit that controls the electric motor to cause the motive power transmission mechanism to execute a predetermined motion; a state management unit that executes a first management program and manages the state of the motive power transmission mechanism on the basis of input information inputted from the electric motor; an external communication unit that communicates with an external device so as to acquire a second management program according to a type of the motive power transmission mechanism; and an update unit that replaces the second management program with the first management program and performs update so as to allow the state management unit to execute the first program. This configuration makes it possible to easily realize addition or change of a software function for managing the motive power transmission mechanism and data related to the function.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring
• H02P 29/024 - Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load

Abstract

A compressor body includes a compression mechanism including a screw rotor that compresses gas, a casing that accommodates the compression mechanism and defines a compression working chambers therein, a suction side bearing that rotatably supports the screw rotor, a bearing chamber that accommodates the suction side bearing, and a liquid supply port that communicates with the compression working chambers and supplies liquid supplied from the outside of the casing into the compression working chambers. The casing has an internal liquid supply flow path that extends from a discharge side of the compression working chambers as an upstream side to a suction side of the compression working chambers as a downstream side and that supplies the liquid to the liquid supply port. The internal liquid supply flow path has a downstream portion reaching the bearing chamber and supplies the liquid to the suction side bearing.

IPC Classes  ?

• F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

The present invention provides an operation apparatus that is capable of facilitating labor reduction by eliminating the need to separately provide a shock mitigating functional component, that allows for reducing the number of components, and does not contribute to increasing device size. For this purpose, the operation apparatus comprises: a moveable iron core that drives a drive shaft for operating a moveable-side electrode that is disposed facing and electrically contacting a fixed-side electrode; and a coil disposed surrounding the moveable iron core, the drive shaft and the moveable iron core integrally operating along with the opening/closing operation of the moveable-side electrode with respect to the fixed-side electrode. The operation apparatus is characterized in that: the drive shaft is slide-supported by a first bearing on the moveable-side electrode side, and on the side opposite the moveable-side electrode side, the moveable iron core is slide-supported by a second bearing; a stopper plate for stopping axial-direction movement at the end on the side opposite the moveable-side electrode side of the moveable iron core is provided; and if the moveable-side electrode and the fixed-side electrode are in the entered (closed) state, a space surrounded by the moveable iron core, the second bearing, and the stopper plate is formed. Representation drawing: fig. 5(a)

IPC Classes  ?

• H01H 33/666 - Operating arrangements