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    METHOD FOR ADAPTIVELY ADJUSTING PWM DUTY CYCLE, CIRCUIT AND MOTOR DRIVING SYSTEM
    1.
    发明公开
    METHOD FOR ADAPTIVELY ADJUSTING PWM DUTY CYCLE, CIRCUIT AND MOTOR DRIVING SYSTEM 审中-公开

    公开(公告)号：US20240332951A1

    公开(公告)日：2024-10-03

    申请号：US18699318

    申请日：2022-07-29

    申请人： CRM ICBG (WUXI) CO., LTD.

    发明人： Sang WANG ,  Xudong ZHAO ,  Zhengrui ZHANG

    IPC分类号： H02H7/09 ,  H02H3/24 ,  H02H7/08 ,  H02P6/28 ,  H02P27/08

    CPC分类号： H02H7/09 ,  H02H3/243 ,  H02H7/0833 ,  H02P6/28 ,  H02P27/08 ,  H02P2205/01 ,  H02P2205/05 ,  H02P2205/07 ,  H02P2209/11

    摘要： The present application relates to a method, circuit, and motor driving system for adaptively adjusting a PWM duty cycle, comprising: sampling a direct current bus voltage and performing a low-pass filtering; determining whether the direct current bus voltage is under-voltage; if yes, entering an under-voltage protection state; and if not, executing the next step; calculating a new duty cycle and a new amplitude; determining whether the new duty cycle is greater than 100%; if yes, applying a weak magnetic control; and if not, adjusting a duty cycle of PWM signals through the new amplitude. Without altering the core current loop, torque loop, or speed loop of the motor driving system, this application adaptively adjusts the PWM duty cycle based on existing sine wave generators and PWM generators, effectively mitigating the impact of direct current bus voltage fluctuations on motor performance, ensuring straightforward operation, and significantly reducing costs.

    External power supply system for spindle
    2.
    发明授权
    External power supply system for spindle 有权

    公开(公告)号：US11949226B2

    公开(公告)日：2024-04-02

    申请号：US17378976

    申请日：2021-07-19

    申请人： NATIONAL CHUNG HSING UNIVERSITY

    发明人： Chien-Hung Liu ,  Yu-Hung Li

    IPC分类号： H02M1/12 ,  B06B3/00 ,  H01H13/64 ,  H02H1/00 ,  H02H7/09 ,  H02M7/04

    CPC分类号： H02H7/09 ,  H02H1/0007 ,  H02M7/04

    摘要： An external power supply system for spindles is revealed. The external power supply system includes a tool holder, a rectifier circuit, an overvoltage protection circuit. and a buck/boost converter. The tool holder receives an external power source of a spindle while the rectifier circuit converts the external power source into a rectified output signal with a power factor through step-down transformation. The overvoltage protection circuit is used to check whether the rectified output signal is larger than an overvoltage signal for outputting an operating potential or a non-operating potential. The buck/boost converter is used for receiving the rectified output signal with the power factor and converting the rectified output signal to an output voltage according to the power factor. Then the output voltage is provided to a load of a low voltage power supply, a high voltage power supply, or a constant voltage power supply.

    Elevator
    3.
    发明授权
    Elevator 有权

    公开(公告)号：US11697574B2

    公开(公告)日：2023-07-11

    申请号：US16451267

    申请日：2019-06-25

    申请人： Kone Corporation

    发明人： Juhamatti Nikander ,  Arto Nakari

    IPC分类号： H02H3/20 ,  H02H3/44 ,  B66B5/02 ,  B66B1/30 ,  B66B5/00 ,  H02H1/00 ,  H02H7/09 ,  H02H7/12 ,  H02P3/06

    CPC分类号： B66B5/028 ,  B66B1/30 ,  B66B5/0031 ,  H02H1/0007 ,  H02H7/09 ,  H02H7/1216 ,  H02P3/06

    摘要： The invention relates to an elevator comprising at least one elevator car moved by at least one elevator motor, which elevator motor is driven by a frequency converter controlled by a control device of the elevator, the frequency converter comprising a rectifier bridge, an inverter bridge and a DC link connected in-between, the inverter bridge being connected to the elevator motor and the rectifier bridge being connected to AC mains via three phase supply lines comprising an LCL-filter and a mains switch. The elevator further comprises a backup power supply and a safety device of the control device, which in case of a mains power failure is configured to switch off the mains switch and to connect the backup power supply to the DC link and/or to at least one phase supply line, whereby the rectifier bridge is a bidirectional rectifier bridge being configured to convert DC supplied to the DC link from the backup power supply to an AC voltage supplied to at least two of the phase supply lines connected with at least one load circuit. An earth fault protection circuit for the load circuit is connected between earth and a common terminal of the capacitors of the LCL filter for monitoring an earth fault indicating signal, and which earth fault protection circuit is configured to issue an earth fault signal and/or initiating earth fault safety measures, dependent on the earth fault indicating signal.

    DEVICE AND PROCESS FOR FAULT DETECTION OF A POWER DEVICE
    4.
    发明申请
    DEVICE AND PROCESS FOR FAULT DETECTION OF A POWER DEVICE 有权

    公开(公告)号：US20220393460A1

    公开(公告)日：2022-12-08

    申请号：US17341942

    申请日：2021-06-08

    申请人： CREE, INC.

    发明人： Adam E. ANDERS

    IPC分类号： H02H7/125 ,  H02H7/09 ,  H02H7/08

    摘要： A power device fault detection circuit includes a first fault detector configured to measure an output signal of at least one power device and output a first fault signal when a voltage of the output signal of the at least one power device exceeds a first voltage reference level after a first time period; and a second fault detector configured to measure an output signal of the at least one power device and output a second fault signal when a voltage of the output signal of the at least one power device exceeds a second voltage reference level after a second time period, where the first time period implemented by the first fault detector is shorter than the second time period implemented by the second fault detector.

    ELECTRICALLY COMMUTATED MOTOR DRIVING DEVICE AND CONTROL METHOD THEREOF
    5.
    发明申请
    ELECTRICALLY COMMUTATED MOTOR DRIVING DEVICE AND CONTROL METHOD THEREOF 有权

    公开(公告)号：US20210408947A1

    公开(公告)日：2021-12-30

    申请号：US17474898

    申请日：2021-09-14

    申请人： Delta Electronics, Inc.

    发明人： Yu-Wei LEE ,  Shang-Wen HSU ,  Wei-Shuo TSENG

    IPC分类号： H02P6/17 ,  H02P6/28 ,  H02H7/08 ,  G01R19/165 ,  H02P29/024 ,  H02H7/09

    摘要： An electronically commutated motor driving module for driving a motor includes a voltage detector, an electronically commutated motor driver, a current detector, a voltage converter, and a controller. The voltage detector detects supply voltage to generate a voltage detection signal. The electronically commutated motor driver is supplied by the supply voltage to generate, according to an electronically commutated signal, an operating current for driving the motor. The current detector detects the operating current to generate a current detection signal. The voltage converter converts the supply voltage into an internal voltage. The controller is supplied by the internal voltage and generates the electronically commutated signal according to a plurality of control parameters. When the controller determines that a specific event has happened according to the control parameters, the controller stops generating the electronically commutated signal and then stores the control parameters.

    Soft-starter AC-AC converter with integrated solid-state circuit breaker and method of operation thereof
    6.
    发明授权
    Soft-starter AC-AC converter with integrated solid-state circuit breaker and method of operation thereof 有权

    公开(公告)号：US11038340B2

    公开(公告)日：2021-06-15

    申请号：US15711152

    申请日：2017-09-21

    申请人： Eaton Intelligent Power Limited

    发明人： Huaqiang Li ,  Kaijam M. Woodley

    IPC分类号： H02H7/085 ,  H02H7/08 ,  H02M5/293 ,  H02P25/16 ,  H02H9/00 ,  H02H7/09 ,  H03K17/687 ,  H03K17/567 ,  H02P1/28 ,  H02H7/12 ,  H02M1/00

    摘要： An AC-AC power converter, such as a motor soft starter, includes an input connectable to an AC source with a disconnect switch, an output connectable to an AC load, and phase lines connecting the input and output to transmit power. In-line solid-state switching blocks are connected between line terminals and load terminals of the AC source and AC load, respectively, such that each phase line includes a solid-state switching block connected thereto. Free-wheeling solid-state switching blocks are connected to the load terminals at one end and together at a common connection at another end, such that each phase line includes a free-wheeling solid-state switching block connected thereto. Each of the in-line and free-wheeling solid-state switching blocks comprises a bi-directional switching block that selectively controls current and withstands voltage in both directions. The switching blocks also provide soft-starter functions, variable speed control, and integrated circuit breaker protection capability.

    Motor driving device
    8.
    发明授权
    Motor driving device 有权

    公开(公告)号：US10044299B2

    公开(公告)日：2018-08-07

    申请号：US15820554

    申请日：2017-11-22

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Yu Sasaki ,  Hiroyuki Iyama

    IPC分类号： H02H7/09 ,  H02P6/12

    摘要： A motor driving device includes: an inverter control unit configured to generate and output a control signal for feedback-controlling a motor using a control command value for setting driving of the motor and a feedback value including a current value of driving power supplied to the motor; an inverter configured to supply driving power to the motor in accordance with the control signal output from the inverter control unit; and an abnormality detecting unit configured to detect an abnormality of the inverter. The abnormality detecting unit determines that the inverter is abnormal when a sum of three-phase AC voltage values of the driving power supplied to the motor is greater than a predetermined voltage value and a difference between the control command value supplied to the inverter control unit and the feedback value is less than a predetermined value.