公开(公告)号：US12044766B2

公开(公告)日：2024-07-23

申请号：US17840542

申请日：2022-06-14

Applicant: Delta Electronics, Inc.

Inventor： Kuo-Heng Chao ,  Chia-Hsiang Chuang ,  Ming-Jen Chao

IPC: G01R31/28 ,  G01R19/00 ,  G01R35/00 ,  H02H1/00 ,  H02H3/04 ,  H02H3/10 ,  H02H7/08 ,  H02K11/33 ,  H02P6/20 ,  H02P6/24 ,  H02P27/06 ,  H03K17/081 ,  H03K17/687 ,  H02P6/182

CPC classification number: G01R35/00 ,  G01R19/0038 ,  G01R31/2837 ,  G01R31/2839 ,  H02H1/0007 ,  H02H3/044 ,  H02H3/10 ,  H02H7/08 ,  H02K11/33 ,  H02P6/20 ,  H02P6/24 ,  H02P27/06 ,  H03K17/08104 ,  H03K17/687 ,  H02P6/182

Abstract: The present disclosure a program burning device configured to read or write to a program burning interface. The program burning device includes a microprocessor, a programming drive circuit and an overcurrent protection circuit. The microprocessor outputs a first test signal or a second test signal. The programming drive circuit outputs a high driving voltage or a low driving voltage to the program burning interface. After the programming drive circuit outputs the low driving voltage for a preset time, the programming drive circuit outputs the high driving voltage to make the program burning interface form a high impedance. Afterwards, the overcurrent protection circuit receives the first test signal to trigger the overcurrent protection, and then receives the second test signal to trigger the undercurrent protection. If triggering the overcurrent protection and the undercurrent protection are continuously failed over a preset number of times, the microprocessor determines that current protection is failed.

公开(公告)号：US12019388B2

公开(公告)日：2024-06-25

申请号：US17847638

申请日：2022-06-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： Masatoshi Itoh

IPC: H02P21/20 ,  G03G15/00 ,  H02P6/182 ,  H02P21/18

CPC classification number: G03G15/5008 ,  G03G15/80 ,  H02P6/182 ,  H02P21/18 ,  H02P21/20

Abstract: A motor control apparatus includes: a current supply unit configured to supply a coil current to a plurality of coils of a motor by controlling a voltage to be applied to the plurality of coils, based on a first command value of an excitation current and a second command value of a torque current; and a control unit configured to control the first command value based on a rotation speed of a rotor of the motor, wherein the control unit is further configured to control, when the rotation speed of the rotor is lower than a first threshold value, the first command value to cause the excitation current to be larger than zero, and control the second command value to supply the torque current in accordance with a load of the rotor.

公开(公告)号：US12015363B2

公开(公告)日：2024-06-18

申请号：US17948468

申请日：2022-09-20

Applicant: Rohm Co., Ltd.

Inventor： Yoshito Otaguro

IPC: H02P23/00 ,  H02P6/08 ,  H02P6/15 ,  H02P6/182 ,  H02P25/00 ,  H02P27/00 ,  H02P27/08

CPC classification number: H02P27/08 ,  H02P6/08 ,  H02P6/15 ,  H02P6/182

Abstract: A motor drive circuit includes: a PWM signal generation part configured to generate a PWM signal based on a count value of a counter; a detection part configured to detect a zero crossing of a counter electromotive voltage generated in a coil of a motor; a prediction part configured to predict an arrival timing of the zero crossing of the counter electromotive voltage; a stop part configured to stop a counting operation of the counter after a first time point going back from the arrival timing predicted by the prediction part; and a reset part configured to reset the count value at a timing at which the detection part detects the zero crossing of the counter electromotive voltage.

公开(公告)号：US20240186874A1

公开(公告)日：2024-06-06

申请号：US18440479

申请日：2024-02-13

Applicant: Jacobi Motors, LLC

Inventor： Nicolaus Radford ,  Mohammadreza Barzegaranbaboli ,  Ahmed Morsy

IPC: H02K21/12 ,  H02K29/12 ,  H02P6/182

CPC classification number: H02K21/12 ,  H02K29/12 ,  H02P6/182

Abstract: A method of changing a magnetic flux density in an air gap between a stator and a rotor in a real-time flux-mnemonic permanent magnet synchronous machine comprising permanent magnets, the method comprising applying at least one current pulse to adjust a magnetic operating point of the magnets, wherein the at least one current pulse has a duration of less than 3 ms. For applying the at least one current pulses, the method comprises consecutively applying a plurality of primitive pulses.

公开(公告)号：US20240128901A1

公开(公告)日：2024-04-18

申请号：US17965519

申请日：2022-10-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Miroslav Oljaca ,  David Stout ,  Dennis P. Lehman ,  Jan Morten Braathen ,  Merril Newman

IPC: H02P6/10 ,  H02P6/182

CPC classification number: H02P6/10 ,  H02P6/182 ,  H02P21/18

Abstract: Methods, circuits and computer program products are presented herein. The method includes isolating a ripple waveform from a current signal originating from a brushed direct current motor (BDCM). The method includes determining the wave count of the ripple waveform. The method includes determining a position of a movable structure operably coupled to a shaft of the BDCM according to the wave count of the ripple waveform. The present technology may be practiced without discrete capacitor components in high pass filtering aspects of the disclosed circuit. The methods, circuits and computer program products can be implemented to accurately determine a rotational position of a shaft of a BDCM and also position(s) of mechanism(s) coupled to the shaft without requiring any external sensors or other components for this purpose other than the disclosed circuits.

公开(公告)号：US11874644B2

公开(公告)日：2024-01-16

申请号：US17146083

申请日：2021-01-11

Applicant: Texas Instruments Incorporated

Inventor： Rajan Lakshmi Narasimha ,  David Patrick Magee

IPC: G05B19/416 ,  G05B19/29 ,  G05B19/414 ,  G05B19/39 ,  G05B19/25 ,  H02K29/10 ,  G02B26/00 ,  H02P27/08 ,  H02P6/16 ,  H02P6/15 ,  H02P6/182 ,  G05B19/23

CPC classification number: G05B19/416 ,  G02B26/008 ,  G05B19/237 ,  G05B19/258 ,  G05B19/291 ,  G05B19/39 ,  G05B19/414 ,  H02K29/10 ,  H02P6/15 ,  H02P6/16 ,  H02P6/182 ,  H02P27/08 ,  G05B2219/41293 ,  G05B2219/42237

Abstract: In described examples of methods and control systems to control a position and/or velocity of a machine, control circuitry is coupled to receive and dither a control signal, and to compute a control output value according to the dithered control signal and a control function. An inverter is coupled to the control circuitry, to control the position and/or velocity according to the control output value.

公开(公告)号：US11863110B2

公开(公告)日：2024-01-02

申请号：US17893308

申请日：2022-08-23

Applicant: LX SEMICON CO., LTD.

Inventor： Il Kwon Kim ,  Jae Hyun Ha

IPC: H02P6/18 ,  H02P6/182 ,  H02P29/024

CPC classification number: H02P6/182 ,  H02P29/024

Abstract: The present disclosure relates to a motor driver and a method of driving a motor capable of driving a motor with optimum efficiency. The method of driving the brushless direct current (BLDC) motor may include an initial driving operation, a test operation of adjusting a turn-on time and a transition time in the test mode step by step, driving the BLDC motor by applying the adjusted turn-on time and the adjusted transition time, and detecting a driving error of the BLDC motor, an operation of repeating the test operation when the driving error is not detected in the test operation, and an operation of setting the turn-on time and the transition time, which are adjusted in an operation just before the driving error is detected, as a turn-on time and a transition time in an optimum driving mode.

公开(公告)号：US11863109B2

公开(公告)日：2024-01-02

申请号：US17784211

申请日：2020-11-20

Applicant: CRRC YONGJI ELECTRIC CO., LTD

Inventor： Xiuhui Xue ,  Xiaojun Hou ,  Tao Geng ,  Lei Zhang ,  Chen Jiang ,  Yukun Zhao ,  Lanlan Guo

IPC: H02P6/182 ,  H02P29/028

CPC classification number: H02P6/182 ,  H02P29/028 ,  H02P2207/05

Abstract: The application provides a method and device for adjusting a permanent magnet motor, an equipment, and a storage medium. The method includes the following operations. An electronic equipment acquires a counter electromotive force (CEMF) parameter, information of an electromagnetic structure of a permanent magnet motor to be adjusted and a minimum impedance value of any short-circuited coil of the permanent magnet motor to be adjusted, to determine an operational time of the short-circuited coil. The electronic equipment further judges, according to the operational time of the short-circuited coil, whether an adjustment instruction is required to be transmitted to a production equipment. When the operational time is inconsistent with a preset time, the electronic equipment transmits the adjustment instruction to the production equipment. The production equipment adjusts, according to the adjustment instruction, the electromagnetic structure of the permanent magnet motor to be adjusted. Through the method of the application, a rail transit vehicle may keep running for the preset time safely after an inter-turn short circuit failure occurs to the permanent magnet motor, and the operational safety of the rail transit vehicle is improved.

公开(公告)号：US20230409120A1

公开(公告)日：2023-12-21

申请号：US18192046

申请日：2023-03-29

Applicant: Samsung Display Co., LTD.

Inventor： Cheon Myeong LEE ,  Sang Ho KIM ,  Soo Min BAEK ,  Ju Youn SON ,  Ji Won LEE ,  Bek Hyun LIM ,  Ju Hwa HA

IPC: G06F3/01

CPC classification number: G06F3/017 ,  G06F3/014 ,  H02P6/182

Abstract: A wearable device includes sensing blocks, and a connection member connecting the sensing blocks, the sensing blocks include a first sensing block and a second sensing block connected to the first sensing block by the connection member, and the first sensing block includes an induced electromotive force sensing module, the induced electromotive force sensing module includes a magnetic body, a coil not contacting the magnetic body and facing the magnetic body, a rod attached to the magnetic body and guiding a movement path of the coil, and an induced electromotive force sensor sensing an induced electromotive force generated in the coil by the coil and the magnetic body.

公开(公告)号：US20230361697A1

公开(公告)日：2023-11-09

申请号：US18221988

申请日：2023-07-14

Applicant: Black & Decker Inc.

Inventor： Shailesh P. WAIKAR ,  Zhi QU ,  Wing LIN ,  John C. VANKO

IPC: H02P6/182 ,  H02P6/18 ,  H02P6/06 ,  B25D11/06 ,  H02P6/17 ,  B25F5/02 ,  H02P6/28

CPC classification number: H02P6/182 ,  H02P6/186 ,  H02P6/06 ,  B25D11/064 ,  H02P6/17 ,  B25F5/02 ,  H02P2203/03 ,  H02P2209/07 ,  H02P6/28 ,  H02P2203/09

Abstract: A control unit for a brushless DC motor of a power tool having a rotor and a stator is provided. The control unit detects an initial position of the rotor, commutates the motor beginning at the initial position of the rotor using a low-speed motor commutation scheme until an output speed of the rotor exceeds a speed threshold, and commutates the motor based on a back-electromotive force (back-EMF) voltage of the motor after the output speed of the rotor exceeds the speed threshold. In the low-speed commutation scheme, the control unit applies a first set of voltage pulses to a present sector and a second set of voltage pulses to a next sector, and detects a transition of the rotor from the present sector to the next sector based on motor current measurements associated with the first set of voltage pulses and the second set of voltage pulses.