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公开(公告)号：US20230006588A1
公开(公告)日：2023-01-05
申请号：US17837043
申请日：2022-06-10
申请人： NIDEC CORPORATION
发明人： Pei-Chun SHIH , Hsin-Nan LIN , Yu-Wei HSU , Ta-Yin LUO , Kuan YANG , Guo-Jhih YAN , Sheng-Chan YEN , Cheng-Tsung LIU
摘要： A method for starting a motor having a stator and a rotor is provided. The method includes starting a motor with field coils of the stator being in Y connection, switching the connection of the field coils to Δ connection when the speed of the rotor does not fall within a predetermined range from a rated speed within a predetermined time (t2), and switching the connection of the field coils to the Y connection when the speed of the rotor falls within the predetermined range from the rated speed.
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公开(公告)号：US11539283B1
公开(公告)日：2022-12-27
申请号：US17339378
申请日：2021-06-04
发明人： Jonathan D. Hoffman , Adam M. Shea
摘要： A power converter is configured to measure an output current and to determine a multi-phase voltage reference as a function of the output current. Within the same switching period the voltage reference is determined, a modulation routine determines a modulation index for each phase of the output voltage. In some instances, one or more phases must start modulation during the switching period before the new modulation index is determined. The modulation routine stores the value of the modulation index generated from the prior switching period and uses the stored value when a new value is not yet ready. An offset value for the phase voltage which used a modulation index from the prior switching period is determined in order to compensate the phase voltages of the other phases and to maintain a desired line-to-line voltage output from the power converter.
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3.发明授权公开(公告)号：US11088647B2
公开(公告)日：2021-08-10
申请号：US16961484
申请日：2018-02-23
摘要： A control method includes setting, when a space phase difference of in-phase coils of the respective groups is represented by α, a time phase difference of electric currents to be supplied to the in-phase coils of the respective groups is represented by β, and a time phase difference of carrier frequencies with which the three-phase inverters are PWM-controlled, respectively, is represented by γ, values of β and γ so that any one or both of the following relationships are satisfied: γ=±(α+2β), and γ=±(α−β)/2, based on a result of comparison between a current amplitude of a primary component and a current amplitude of a secondary component of a carrier harmonic current, to control the dynamoelectric machine.
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公开(公告)号：US10931220B2
公开(公告)日：2021-02-23
申请号：US15768533
申请日：2016-10-12
申请人： SunTech Drive, LLC
IPC分类号： H02P27/08 , G05F1/67 , H02P1/26 , H02S40/32 , H02P1/52 , H02M3/158 , H02S40/30 , H02P1/42 , H02P27/04 , H02M7/5387
摘要： Solar Motor Controller is an electronic device with DC power input terminals that may connect directly to solar PV panels, and output terminals that may connect directly to single or multiphase phase AC electric motors without requiring an energy storage subsystem. The Controller runs electric motors of many frequencies and is capable of interfacing to multiple voltages of solar PV panels with or without maximum power point tracking. The Controller may drive motors in water pumping, HVAC, refrigeration, compressors operation, blowers, machine tools, and many other applications; some controller applications may operate at motor speeds adjusted to conform to power available from attached solar panels.
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5.发明授权公开(公告)号：US10819253B2
公开(公告)日：2020-10-27
申请号：US16307036
申请日：2017-02-10
申请人： Interroll Holding AG
发明人： Daniel Schang
摘要： A controller for a drive motor (60) of a product conveyor belt at a checkout has a phase-start cutting and/or phase-end cutting controller (50) that controls the drive motor (60) in such a manner that the product conveyor belt is accelerated with reduced torque from a non-driven state. A start controller controls the drive motor (60) in such a manner that the drive motor (60) initially drives with a non-reduced torque when accelerating the product conveyor belt from the non-driven state before the phase-start cutting and/or phase-end cutting controller (50) further accelerates the product conveyor belt with reduced torque.
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公开(公告)号：US10784802B2
公开(公告)日：2020-09-22
申请号：US15768666
申请日：2016-10-18
发明人： Eric De Wergifosse
IPC分类号： H02P9/00 , H02P1/26 , F02N11/04 , H02K17/42 , H02P101/30
摘要： A generator starter of a turbomachine, including an asynchronous electric machine configured so as to operate in motor mode during a starting phase of the turbomachine while being supplied by an electrical source, and so as to operate in generator mode after the starting phase of the turbomachine in order to supply an electrical load. An inverter is arranged between the electrical source and the asynchronous machine with at least two alternating current terminals coupled to the asynchronous machine, and a control unit for the inverter configured to supply the asynchronous machine with a starting current in motor mode and a magnetisation current in generator mode. The asynchronous machine includes at least one first stator winding connected to the alternating current terminals to be supplied with the starting current in motor mode and with the magnetisation current in generator mode, and at least one second stator winding connected to the electrical load in generator mode.
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公开(公告)号：US10594231B2
公开(公告)日：2020-03-17
申请号：US16224283
申请日：2018-12-18
摘要： A motor starter for operating an electric motor connected to a multiphase power supply includes a semiconductor switch arranged in a current-carrying phase of the multiphase power supply, and an electromechanical switch arranged in parallel relation to the semiconductor switch in the current-carrying phase. The electromechanical switch includes a movable switching piece configured tiltable to reduce a current gradient in the semiconductor switch.
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公开(公告)号：US10396689B2
公开(公告)日：2019-08-27
申请号：US15692595
申请日：2017-08-31
摘要： A PCB motor controller comprises relays mounted on a PCB and interconnected to power traces in or on the PCB to receive incoming three-phase power and to output three-phase power to a motor. Control power traces in or on the PCB connect the relays to control circuitry, also mounted on the PCB. A power supply is mounted on the PCB and connected to the control circuitry to provide power for its operation and for switching of the relays. The relays are switched in accordance with a point-on-wave (POW) switching scheme, allowing for the use or relays and the PCB, which may not otherwise be suitable for motor control applications.
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公开(公告)号：US10395857B2
公开(公告)日：2019-08-27
申请号：US15692614
申请日：2017-08-31
摘要： A PCB motor controller comprises relays mounted on a PCB and interconnected to power traces in or on the PCB to receive incoming three-phase power and to output three-phase power to a motor. Control power traces in or on the PCB connect the relays to control circuitry, also mounted on the PCB. A power supply is mounted on the PCB and connected to the control circuitry to provide power for its operation and for switching of the relays. The relays are switched in accordance with a point-on-wave (POW) switching scheme, allowing for the use or relays and the PCB, which may not otherwise be suitable for motor control applications.
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公开(公告)号：US10345381B2
公开(公告)日：2019-07-09
申请号：US15708689
申请日：2017-09-19
IPC分类号： G01R31/327 , H01H50/16 , G01K7/00 , H01H47/00 , H01H47/22 , H01H50/00 , H01H47/26 , H01H47/02 , H01H50/38 , H01H50/32 , H01H89/00 , H02P1/26 , H01H9/26 , G01R31/44 , H01H9/30 , H02P1/32 , H01H9/56 , H01H71/08
摘要： One embodiment describes a switching device system, which includes a first single pole switching device that selectively connects and disconnects a first phase of electric power to a first winding of a three phase motor; a second single switching device that selectively connects and disconnects a second phase of electric power to a second winding of the three phase motor; in which the first and second single pole switching devices control temperature of the motor by, at a first time, connecting the first phase and the second phase electric power to the motor.
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