公开(公告)号：US20230421080A1

公开(公告)日：2023-12-28

申请号：US18253021

申请日：2021-11-17

申请人： SAMI SHAMOON COLLEGE OF ENGINEERING (R.A.)

发明人： Zvi VAINER ,  Boris EPSHTEIN ,  Dmitry BAIMEL ,  Maxim RADKIN

IPC分类号： H02P21/18 ,  H02P21/12 ,  H02P21/34 ,  H02P21/36

CPC分类号： H02P21/18 ,  H02P21/12 ,  H02P21/34 ,  H02P21/36

摘要： A method for controlling a synchronous motor that has a stator and a rotor, comprising: correcting the frequency, phase, and values of the motor's feeding voltages, as well as the value of its magnetic flux as a function of the angle between stator and rotor magnetic fields vectors of said synchronous motor, wherein said angle derivative an angular speeds mismatch between said vectors.

公开(公告)号：US20230081528A1

公开(公告)日：2023-03-16

申请号：US18049319

申请日：2022-10-25

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： Aravind Samba Murthy ,  David Patrick Magee

IPC分类号： B60L7/14 ,  H02P3/16 ,  B60L15/20 ,  B60L15/02 ,  B60L7/18 ,  H02P21/22 ,  H02P21/36 ,  H02P27/08

摘要： A regenerative braking controller for an AC motor. To determine an electromagnetic torque for slowing or stopping the motor, the regenerative braking controller accesses a lookup table to retrieve a braking torque value corresponding to a current estimate of rotor velocity. The retrieved braking torque may correspond to a maximum or minimum torque level at which regenerative braking will occur at the current rotor velocity, or to a torque level at which charging current during regenerative braking will be maximized. If an external mechanical brake is present, the regenerative braking controller can forward an external braking torque signal to a controller so that the mechanical brake can apply the remainder of the braking force beyond that indicated by the regenerative braking torque. A method for establishing the braking torques to be stored in the lookup table is also disclosed.

公开(公告)号：US20230026306A1

公开(公告)日：2023-01-26

申请号：US17814171

申请日：2022-07-21

申请人： Microchip Technology Incorporated

发明人： Sergiu Oprea ,  Mihnea Rosu-Hamzescu ,  Marius Dracea

IPC分类号： B60L7/18 ,  H02P21/13 ,  H02P21/18 ,  H02P21/22 ,  H02P21/36

摘要： A controller for a motor system includes an input terminal to receive a signal indicating a speed of an electric motor and a regenerative brake current interpolator to indicate a brake current to be applied to the electric motor responsive to the speed of the electric motor. Values of the brake current vary with variation of the speed of the electric motor.

公开(公告)号：US20220255479A1

公开(公告)日：2022-08-11

申请号：US17731997

申请日：2022-04-28

申请人： Black & Decker Inc.

发明人： Girish YAJURVEDI ,  Mehdi RAMEZANI ,  Michael K. Forster ,  John C. VANKO ,  Tal GOTTESMAN ,  Levent GOKDERE

IPC分类号： H02P21/10 ,  H02P21/18 ,  H02P21/22 ,  H02P21/36 ,  B25F5/02 ,  H02P21/00 ,  H02P21/13 ,  H02P27/12 ,  H02P21/34

摘要： A power tool is provided including a housing, a brushless motor disposed within the housing, a power switch circuit that supplies power from a power source to the brushless motor, and a controller configured to apply a drive signal to the power switch circuit to control the supply of power to the brushless motor. The controller is configured to receive at least one signal associated with a phase current of the motor, detect an angular position of the rotor based on the phase current of the motor within a variable speed range of zero to at least 15,000 rotations-per-minute (RPM), and control the drive signal based on the detected angular position of the rotor to electronically commutate the motor within a power output of zero to at least 1500 watts.

公开(公告)号：US11108352B2

公开(公告)日：2021-08-31

申请号：US16132766

申请日：2018-09-17

申请人： SZ DJI TECHNOLOGY CO., LTD.

发明人： Qiu Lan ,  Changxing Zhou

IPC分类号： H02P21/22 ,  H02P21/06 ,  H02P21/36 ,  H02P29/62 ,  B60L15/20 ,  H02P21/00

摘要： A method for controlling a motor configured to provide propulsion for a mobile platform includes determining whether to activate a preheat mode based on a temperature of a motor and, upon determining to activate the preheat mode, controlling a preheat current provided to the motor to enable self-preheating of the motor.

公开(公告)号：US11001246B2

公开(公告)日：2021-05-11

申请号：US16365204

申请日：2019-03-26

申请人： NTN CORPORATION

发明人： Yui Masuda

IPC分类号： B60T13/74 ,  B60T17/20 ,  B60T1/06 ,  B60T8/171 ,  B60T8/172 ,  H02P21/18 ,  H02P21/22 ,  H02P21/36 ,  B60T8/32 ,  B60T8/00 ,  H02P29/00

摘要： This electric brake device includes: a brake rotor, a friction member, a friction member operator, an electric motor, and a controller which controls, by controlling the electric motor, a braking force generated as a result of contact between the friction member and the brake rotor. The electric brake device includes a vehicle speed estimator which estimates the speed of the vehicle having the electric brake device mounted thereon. The controller includes a power limiter which limits the power that drives the electric motor. When an estimated vehicle speed, which is the speed of the vehicle estimated by the vehicle speed estimator, is in a determined low-speed range, the power limiter limits the power in accordance with a condition that has been determined such that the maximum power consumption of the electric brake device decreases in accordance with decrease in the estimated vehicle speed.

公开(公告)号：US10260559B2

公开(公告)日：2019-04-16

申请号：US14137891

申请日：2013-12-20

申请人： SHIMADZU CORPORATION

发明人： Junichiro Kozaki

IPC分类号： H02P23/20 ,  H02P1/28 ,  F16C32/04 ,  F04D29/058 ,  H02P6/182 ,  F04D19/04 ,  H02P21/24 ,  H02P21/36

摘要： A motor driving device comprises a first arithmetic section calculating a rotational speed and a magnetic pole electrical angle of a motor rotor, a current command setting section setting a d-axis current command and a q-axis current command in a rotating coordinate dq system based on a difference between the rotational speed and a target rotational speed, a driving command generating section generating a sinusoidal wave driving command based on the d-axis current command, the q-axis current command, the rotational speed and the magnetic pole electrical angle and a PWM signal generating section. When the rotational speed has a positive value indicating a positive rotational state, the current command setting section sets the q-axis current command of acceleration driving, and when the rotational speed has a negative value indicating a reverse rotational state, the current command setting section sets the q-axis current command of deceleration driving.

公开(公告)号：US09871476B2

公开(公告)日：2018-01-16

申请号：US15521799

申请日：2015-11-30

申请人： China University of Mining and Technology

发明人： Hao Chen ,  He Cheng ,  Zhou Yang ,  Qing Wang ,  Qianlong Wang ,  Xing Wang

IPC分类号： H02P25/08 ,  H02P6/24 ,  G05B19/416 ,  H02P25/086 ,  H02P21/36 ,  H02P21/20

CPC分类号： H02P6/24 ,  G05B19/416 ,  G05B2219/37312 ,  H02P21/20 ,  H02P21/36 ,  H02P25/08 ,  H02P25/086

摘要： A braking torque closed-loop control system and method for a switch reluctance motor. The closed-loop control system comprises a torque regulator, a mode selector, a current regulator, an angle optimization controller and a torque estimator. On the basis of the rotating speed of the motor, the mode selector implements a phase current soft chopper control in a low rotating speed region and an angle position control in a high rotating speed region. The current regulator performs soft chopper hysteretic current regulation. The angle optimization controller optimizes a turn-on angle and a turn-off angle of a power converter master switch to reduce torque pulsation and improve braking energy feedback efficiency. The torque estimator conducts an on-line estimation of an actual braking torque estimated value of the motor based on an actual phase voltage and current of the motor to achieve braking torque signal feedback.

公开(公告)号：US20230361705A1

公开(公告)日：2023-11-09

申请号：US18224170

申请日：2023-07-20

申请人： DENSO CORPORATION

发明人： Miho YAMAGUCHI

IPC分类号： H02P21/36 ,  H02P21/16 ,  H02P21/22

CPC分类号： H02P21/36 ,  H02P21/16 ,  H02P21/22

摘要： A control apparatus is applied to a system that includes a rotating electric machine and an inverter. The inverter has, for each of a plurality of phases, upper-arm and lower-arm switches each of which has a diode connected in antiparallel thereto. The control apparatus includes an all-phase short-circuiting unit and a single-phase short-circuiting unit. The all-phase short-circuiting unit performs all-phase short-circuit control of turning on, for example, all the upper-arm switches of the plurality of phases while turning off all the lower-arm switches of the plurality of phases. The single-phase short-circuiting unit performs, in a regenerative drive state of the rotating electric machine and prior to execution of the all-phase short-circuit control, single-phase short-circuit control of turning on one of the upper-arm and lower-arm switches of one of the plurality of phases, turning off the other switch of the phase and turning off all the switches of the remaining phases.

公开(公告)号：US11811341B2

公开(公告)日：2023-11-07

申请号：US16768156

申请日：2018-11-27

申请人： LG Electronics Inc.

发明人： Kyungtae Park ,  Dongwook Kim ,  Sunil Lee

IPC分类号： H02P21/36 ,  D06F37/40 ,  H02P3/18 ,  H02P27/06 ,  D06F34/10 ,  D06F103/00 ,  D06F103/46 ,  D06F105/52 ,  D06F34/08

CPC分类号： H02P21/36 ,  D06F34/10 ,  D06F37/40 ,  H02P3/18 ,  H02P27/06 ,  D06F34/08 ,  D06F2103/00 ,  D06F2103/46 ,  D06F2105/52

摘要： A home appliance having a motor includes: an inverter unit; and an inverter control unit for controlling a switching operation of the inverter unit, wherein the inverter control unit generates a braking command for braking the motor, on the basis of an operating mode of the home appliance, and controls the inverter unit to stop the motor when a preset braking time elapses after the braking command is generated, and to execute a first braking mode in which the rotational speed of the motor is reduced in a state where no current flows in the inverter control unit, and then to execute at least one of a second braking mode and a third braking mode in which the rotational speed of the motor is reduced in a state where a current flows in the inverter control unit.