公开(公告)号：US12081153B2

公开(公告)日：2024-09-03

申请号：US18222643

申请日：2023-07-17

申请人： Weatherford Technology Holdings, LLC

发明人： Mohammed S. Arefeen

IPC分类号： H02P6/30 ,  H02J7/00 ,  H02P27/06

CPC分类号： H02P27/06 ,  H02J7/0063

摘要： An electrical ride-through (ERT) unit is configured to apply a voltage to a drive circuit during disruptions of line voltage to the drive circuit. The ERT unit includes a capacitor on an ERT circuit that is prevented from applying the voltage to the drive circuit during normal operation of the drive circuit and applies the voltage to the drive circuit during a voltage drop on the drive circuit.

公开(公告)号：US20230353070A1

公开(公告)日：2023-11-02

申请号：US18245989

申请日：2021-08-11

申请人： Robert Bosch GmbH

发明人： Andreas Schmidtlein ,  Christoph Emde

IPC分类号： H02P6/06 ,  F04B17/03 ,  H02P6/30

CPC分类号： H02P6/06 ,  F04B17/03 ,  H02P6/30 ,  B60T17/02

摘要： A method for operating an electric motor, in particular of a piston pump. The electric motor has a rotor shaft and is actuated with a target rotational speed and a target rotational direction for the rotor shaft as a function of a power demand, wherein an actual rotational speed of the rotor shaft is monitored. In the method, the target rotational direction is changed for a specified period of time if the actual rotational speed is equal to zero and the target rotational speed is unequal to zero, and the electric motor is then actuated again at the target rotational speed and in the target rotational direction.

公开(公告)号：US11336166B2

公开(公告)日：2022-05-17

申请号：US16594195

申请日：2019-10-07

申请人： Tensor Tech Co., Ltd.

发明人： Po-Hsun Yen ,  Shang-Jung Lee ,  Yung-Cheng Chang ,  Sung-Liang Hou

IPC分类号： H02K17/08 ,  H02K41/06 ,  H02K3/26 ,  H02K7/08 ,  H02K11/33 ,  H02P6/17 ,  H02P6/30 ,  H02K11/215

摘要： A motor includes a stator with a first stator, a second stator, and a third stator, each including at least one stator coil, and a rotor including a magnetic element, a first bearing, a second bearing, and a shaft, the stators generating a superimposed magnetic field together causing the magnetic element to rotate. When the magnetic element rotates in the first plane, the outer ring of the first bearing rotates. The center of the first bearing is located in a plane where the second bearing is located, and when the magnetic element rotates in the second plane, the inner ring of the second bearing rotates. A central axis of the shaft passes through the center of the first bearing; wherein the shaft is rotatably fixed to the first bearing and connected to the second bearing.

公开(公告)号：US20210367539A1

公开(公告)日：2021-11-25

申请号：US17324785

申请日：2021-05-19

申请人： CANON KABUSHIKI KAISHA

发明人： Jun Yamamoto

IPC分类号： H02P6/18 ,  H02P6/24 ,  H02P6/30

摘要： A motor control apparatus includes a detection unit configured to detect an actual rotation position of a motor, a control unit configured to provide position feedback control on the motor so that the detected actual rotation position sequentially approaches a plurality of target rotation positions, and a processing unit configured to perform, before the position feedback control starts, processing to make an initial position deviation fall within a predetermined range, the initial position deviation being a difference between the actual rotation position and a first target rotation position of the plurality of target rotation positions.

公开(公告)号：US11128243B2

公开(公告)日：2021-09-21

申请号：US16525814

申请日：2019-07-30

申请人： AISIN SEIKI KABUSHIKI KAISHA

发明人： Hiroyuki Miyamoto ,  Koichi Aizawa

IPC分类号： H02P21/18 ,  H02P21/22 ,  H02P6/18 ,  H02P6/30 ,  F04B9/00 ,  H02P6/15

摘要： A drive apparatus of an electric motor which does not include a position detection sensor, the drive apparatus includes drive portion configured to drive the electric motor on the basis of a command value inputted from outside, a number-of-rotations detection portion configured to detect a number of rotations of the electric motor driven by the drive portion, an out-of-phase judgement portion judging that the electric motor is out of phase in a case where the number of rotations detected by the number-of-rotations detection portion is less than a predetermined threshold value, and the predetermined threshold value being configured to be changed on the basis of the command value inputted from outside.

公开(公告)号：US10826416B2

公开(公告)日：2020-11-03

申请号：US16299573

申请日：2019-03-12

申请人： MINEBEA MITSUMI Inc.

发明人： Satoshi Hatahara ,  Wataru Nogamida

IPC分类号： H02P3/18 ,  H02P25/16 ,  H02P21/26 ,  H02P6/30 ,  H02P6/08 ,  H02P25/22 ,  H02P6/16 ,  H02P6/12

摘要： A motor device includes a motor having coils of three phases and a single-phase coil. The motor device includes a drive circuit of a first system capable of supplying a drive current to the coils of the three phases and a drive circuit of a second system capable of supplying a drive current to the single-phase coil. The drive circuit of the second system is different from the drive circuit of the first system. The drive circuit of the first system includes a three-phase inverter circuit connected to one end of each of the coils of the three phases, and the drive circuit of the second system includes a single-phase inverter circuit connected to both ends of the single-phase coil.

公开(公告)号：US10707787B2

公开(公告)日：2020-07-07

申请号：US16111288

申请日：2018-08-24

申请人： Johnson Electric International AG

发明人： Chiping Sun ,  Shinghin Yeung ,  Haibo Jiang ,  Guodong Liu ,  Shujuan Huang

IPC分类号： H02P6/28 ,  H02P25/026 ,  H02P6/15 ,  H02P6/16 ,  H02P1/46 ,  H02P25/03 ,  H02P6/30 ,  H02P29/032

摘要： A motor, a driving circuit thereof and a driving method thereof are provided. The motor driving method includes: during a motor starting stage, when a detected rotor magnetic field is a first polarity and a polarity of an AC power source is positive, or the detected rotor magnetic field is a second polarity and the polarity of the AC power source is negative after a zero voltage crossing point of the AC power source, instantly sending a trigger pulse to a controllable bidirectional AC switch connected in series with a motor winding at both ends of the AC power source; during a motor operating stage, after the zero voltage crossing point of the AC power source, sending a trigger pulse to the controllable bidirectional AC switch after a delay time after the zero voltage crossing point. This method can provide a large torque during the motor starting stage.

公开(公告)号：US20200067435A1

公开(公告)日：2020-02-27

申请号：US16462675

申请日：2017-11-22

申请人： MAKITA CORPORATION

发明人： Takeshi NISHIMIYA ,  Hidekazu SUDA

IPC分类号： H02P6/30 ,  H02P6/12 ,  H02P6/16 ,  H02P6/24 ,  B23D47/12 ,  B23D59/00

摘要： An electric working machine in one aspect of the present disclosure includes: a motor; a driver to drive the motor; a first control circuit; and a second control circuit. The first control circuit controls the driver such that the motor rotates in a set rotation direction. The second control circuit is provided separately from the first control circuit. The second control circuit detects a rotation direction of the motor and performs an abnormality handling process to stop rotation of the motor in response to a situation where the detected rotation direction is reverse to the set rotation direction.

公开(公告)号：US20190312534A1

公开(公告)日：2019-10-10

申请号：US16449650

申请日：2019-06-24

申请人： Toshiba Lifestyle Products & Services Corporation

发明人： Toshimitsu AIZAWA

IPC分类号： H02P6/15 ,  H02P6/28 ,  H02P6/30 ,  H02M7/5387 ,  H02M1/08

摘要： According to an embodiment of the present invention, a control circuit of a motor drive device activates a first timer according to the rotational position of a motor, controls, on the basis of the time counted by the first timer, the on-timing of positive-side switching elements that constitute an inverter circuit, and energizes the motor. The control circuit also activates a second timer according to the on-timing, controls the off-timing of the positive-side switching elements, on the basis of the time counted by the second timer, sets negative-side switching elements of two opposing arms to be in an on-state to cause a reflux current to flow, and then changes an energization direction to the motor. When the rotational position is set to a position for activating the first timer before the on-timing, turning on of the positive-side switching elements and activation of the second timer, which are scheduled to be performed at the on-timing, are carried out.

公开(公告)号：US10439529B2

公开(公告)日：2019-10-08

申请号：US15231172

申请日：2016-08-08

申请人： Johnson Electric S.A.

发明人： Chi Ping Sun ,  Fei Xin ,  Ken Wong ,  Shing Hin Yeung ,  Hui Min Guo ,  Shu Zuo Lou ,  Xiao Ming Chen ,  Guang Jie Cai ,  Chun Fai Wong ,  Shu Juan Huang ,  Yun Long Jiang ,  Yue Li ,  Bao Ting Liu ,  En Hui Wang ,  Xiu Wen Yang ,  Li Sheng Liu ,  Yan Yun Cui

IPC分类号： H02P1/00 ,  H02P27/04 ,  H02P6/20 ,  H02P7/295 ,  H02P6/16 ,  H02P6/30 ,  H02P7/03 ,  G01D5/14 ,  H02K11/20 ,  H02K11/33 ,  H02K11/04

摘要： A sensor integrated circuit includes a rectifier, a power supply module, an output control circuit and a detecting circuit. The rectifier is configured to convert an external power supply into a first direct current power supply. The power supply module includes a voltage regulator configured to generate a second direct current power supply different from the first direct current power supply. The detecting circuit is powered by the second direct current power supply and configured to detect an inputted signal and correspondingly generate a control signal. The output control circuit is configured to control, in response to at least the control signal, the sensor integrated circuit to operate in at least one of a first state in which a current flows out from an output port and a second state in which a current flows in from the output port.