公开(公告)号：US12015363B2

公开(公告)日：2024-06-18

申请号：US17948468

申请日：2022-09-20

申请人： Rohm Co., Ltd.

发明人： Yoshito Otaguro

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

CPC分类号： H02P27/08 ,  H02P6/08 ,  H02P6/15 ,  H02P6/182

摘要： 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：US11909332B2

公开(公告)日：2024-02-20

申请号：US17395314

申请日：2021-08-05

申请人： BEIJING VOYAGER TECHNOLOGY CO., LTD.

发明人： Qin Zhou ,  Youmin Wang ,  Yue Lu ,  Lingkai Kong

IPC分类号： H02N1/00 ,  B81B3/00 ,  B81B7/00 ,  H02P25/00 ,  H02N1/08

CPC分类号： H02N1/008 ,  B81B3/0021 ,  B81B3/0043 ,  B81B7/008 ,  H02P25/00 ,  B81B2201/033 ,  H02N1/08

摘要： Embodiments of the disclosure provide a comb drive, a comb drive system, and a method of operating the comb drive to rotate bi-directionally in a MEMS environment. An exemplary comb drive system may include a comb drive, at least one power source, and a controller. The comb drive may include a stator comb having a first electrically conductive layer spaced apart from a second electrically conductive layer. The comb drive may also include a rotor comb having a first electrically conductive layer spaced apart from a second electrically conductive layer. The controller may be configured to apply first and second voltage levels having opposite polarities to the first and second electrically conductive layers of the rotor comb, respectively. The controller may also be configured to apply an intermediate voltage level to one of the first or second electrically conductive layers of the stator comb.

公开(公告)号：US11223308B2

公开(公告)日：2022-01-11

申请号：US16961745

申请日：2019-01-11

申请人： Siemens Gamesa Renewable Energy A/S

发明人： Paul Godridge ,  Yashan Hu ,  Arwyn Thomas ,  Zhan-Yuan Wu

IPC分类号： H02P23/00 ,  H02P25/00 ,  H02P27/00 ,  H02P21/05 ,  H02P21/22 ,  F03D9/25 ,  F03D7/00 ,  H02P101/15

摘要： Provided is a method of controlling a multi-channel multi-phase electrical machine including a plurality of channels each with a set of phase windings connected to a converter, which method includes the steps of operating the converters to electrically phase-shift the channels; computing harmonic injection currents for a dominant harmonic on the basis of electrical quantities in a rotating reference frame; determining harmonic voltage references for the dominant harmonic on the basis of the harmonic injection currents; and regulating the AC output voltages of the channels according to the fundamental voltage references and the harmonic voltage references. Also provided is a control arrangement of a multi-channel multi-phase electrical machine; a wind turbine; and a computer program product.

公开(公告)号：US20210367536A1

公开(公告)日：2021-11-25

申请号：US17395314

申请日：2021-08-05

申请人： BEIJING VOYAGER TECHNOLOGY CO., LTD.

发明人： Qin Zhou ,  Youmin Wang ,  Yue Lu ,  Lingkai Kong

IPC分类号： H02N1/00 ,  B81B3/00 ,  H02P25/00 ,  B81B7/00

摘要： Embodiments of the disclosure provide a comb drive, a comb drive system, and a method of operating the comb drive to rotate bi-directionally in a MEMS environment. An exemplary comb drive system may include a comb drive, at least one power source, and a controller. The comb drive may include a stator comb having a first electrically conductive layer spaced apart from a second electrically conductive layer. The comb drive may also include a rotor comb having a first electrically conductive layer spaced apart from a second electrically conductive layer. The controller may be configured to apply first and second voltage levels having opposite polarities to the first and second electrically conductive layers of the rotor comb, respectively. The controller may also be configured to apply an intermediate voltage level to one of the first or second electrically conductive layers of the stator comb.

公开(公告)号：US10970147B2

公开(公告)日：2021-04-06

申请号：US16074460

申请日：2016-05-24

申请人： Mitsubishi Electric Corporation

发明人： Eiji Iwami ,  Munenori Yamamoto

IPC分类号： G06F11/00 ,  G06F11/07 ,  H02P6/00 ,  B62D1/00 ,  H02P25/26 ,  B62D5/04 ,  H02P6/16 ,  H02P6/06 ,  H02P6/18 ,  H02P6/08 ,  H02P25/00 ,  G06F9/28 ,  G06F9/50

摘要： An abnormality determination means performs detection of abnormality of one of the pairs of detection means at a normal speed, and performs detection of abnormality of the other of the pairs at a speed not higher than the normal speed, and, when a sign of abnormality of the detection means is detected at the normal speed, a CPU performs switching to the other normal pair and continues control, and the abnormality determination means performs detection of abnormality of the other normal pair at the normal speed, and meanwhile, continues to perform detection of abnormality of the abnormal pair at a speed not higher than the normal speed.

公开(公告)号：US10723233B2

公开(公告)日：2020-07-28

申请号：US16269835

申请日：2019-02-07

申请人： DENSO CORPORATION

发明人： Yoshihiro Shamoto ,  Kazuhito Hayashi ,  Hiroyuki Oyanagi

IPC分类号： H02P23/00 ,  H02P25/00 ,  H02P27/00 ,  B60L15/22 ,  H02P27/08 ,  B60L15/08 ,  H02P23/04 ,  B60L15/06 ,  H02P21/05 ,  H02P29/50

摘要： A controller of an electrically powered vehicle includes an electronic control unit. The electronic control unit performs a switching control by a square wave control in a first switching mode when a rotation speed of the motor is equal to or higher than a first predetermined rotation speed. The electronic control unit performs the switching control by the square wave control in a second switching mode when the rotation speed of the motor is lower than the first predetermined rotation speed. The first predetermined rotation speed is a rotation speed lower than a first resonance region. The first switching mode is a mode of a switching pattern that suppresses LC resonance in the first resonance region. The second switching mode is a mode of a switching pattern that suppresses LC resonance in a second resonance region lower than the first predetermined rotation speed.

公开(公告)号：US10424994B2

公开(公告)日：2019-09-24

申请号：US16002239

申请日：2018-06-07

申请人： DENSO CORPORATION

发明人： Hideki Kabune

IPC分类号： H02P25/00 ,  H02K9/00 ,  B62D5/04 ,  H02K11/33 ,  H02K11/21 ,  H02K11/30 ,  H02K5/173 ,  H02K5/22 ,  H02K9/22

摘要： A drive device that includes a rotating electric machine having a stator with a winding wound on the stator, a rotor rotatably disposed relative to the stator, and a shaft rotating together with the rotor. The drive device also includes a frame member fixed on the rotating electric machine. The drive device further includes a circuit board fixed on the frame member, with a first surface of the circuit board on a frame member side serving as a heat generation element mount surface. The drive device also has a drive element located on the first surface of the circuit board in a heat dissipatable manner, and serving as a component of an inverter that switches on and off to supply an electric current to the winding.

公开(公告)号：US10186994B2

公开(公告)日：2019-01-22

申请号：US15817578

申请日：2017-11-20

申请人： Braun GmbH

发明人： Christian Neyer ,  Holger Hild ,  Felix Koenig ,  Gerd Laschinski

IPC分类号： H02P23/00 ,  H02P25/00 ,  H02P27/00 ,  H02P7/06 ,  B26B19/38 ,  A61B17/50 ,  B26B19/28 ,  H02P29/00 ,  H02P7/28 ,  H02P7/29 ,  A45D26/00 ,  A61B17/00

摘要： The invention is related to a drive control for driving a dc motor of an electrical household appliance, in particular a hair cutting device such as an electric razor, shaver or epilator, at constant rotational speed.

公开(公告)号：US10103669B2

公开(公告)日：2018-10-16

申请号：US15413433

申请日：2017-01-24

申请人： Andras Lelkes ,  Adam Daniel Lelkes

发明人： Andras Lelkes ,  Adam Daniel Lelkes

IPC分类号： H02P23/00 ,  H02P25/00 ,  H02P27/00 ,  H02P23/14 ,  G05B13/02 ,  H02P25/02 ,  H02P21/00 ,  H02P21/14

摘要： A method to control a motor which is electrically excited. The method includes providing a unit capable of learning which is configured to analyze processes in a machinery into which the motor is built so as to learn to optimally control a variable motor flux. The unit capable of learning thereby sets the variable motor flux so as to minimize motor losses absent an adverse impact on a dynamic property of a drive

公开(公告)号：US10084368B2

公开(公告)日：2018-09-25

申请号：US15069958

申请日：2016-03-14

申请人： Samsung Electronics Co., Ltd.

发明人： Je Hyung Cho ,  Sun Jin Kim ,  Han Sol Seo

IPC分类号： H02P25/00 ,  H02M1/14 ,  H02P27/14 ,  H02M7/483

CPC分类号： H02M1/14 ,  H02M5/458 ,  H02M7/483 ,  H02P27/14

摘要： A motor driving apparatus includes an AC-DC conversion unit configured to rectify an AC power supplied from an external AC power source, a DC link unit configured to stabilize a voltage rectified by the AC-DC conversion unit, and a DC-AC conversion unit configured to supply the AC power to a motor using the DC voltage from the DC link unit. The DC link unit may include one pair of film capacitors configured to remove a ripple of the rectified voltage, and the DC-AC conversion unit may include a 3-level inverter receiving the DC voltage from the one pair of film capacitors to supply the AC power to the motor.