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公开(公告)号：US12101042B2
公开(公告)日：2024-09-24
申请号：US17408573
申请日：2021-08-23
发明人： Shaochun Ye , Robert L. Morris , Jordan Billet
CPC分类号： H02P21/18 , B60L3/06 , B60L3/106 , B60L15/2009 , B60L15/2072 , B60L15/36 , H02P6/06 , B60L2240/14 , B60L2240/421 , B60L2240/423
摘要： A system includes a reference speed module and a motor control module. The reference speed module is configured to determine a reference speed range based on a speed of a left wheel of a pair of front or rear wheels of a vehicle and a speed of a right wheel of the pair of front or rear wheels. The right wheel is disconnected from the left wheel. The motor control module is configured to control at least one of a first electric motor and a second electric motor based on the reference speed range. The first electric motor is connected to the left wheel. The second electric motor is connected to the right wheel.
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公开(公告)号：US11973454B2
公开(公告)日：2024-04-30
申请号：US17540278
申请日：2021-12-02
申请人： Bell Textron Inc.
CPC分类号： H02P6/06 , B60W10/08 , G01R31/343 , H02P1/26 , H02P6/185 , B60W2420/50 , B60W2420/90
摘要： A system includes a driver monitor system configured to receive information about driver operation, a relationship table comprising information about an expected relationship between driver operation and a preload force, and a driver controller configured to control a driver in response to the information about driver operation and according to the relationship table. A method of managing a preload force includes providing a first component, providing a second component for compression against the first component, operating a driver to move the first component into contact with the second component, monitoring an operation of the driver, and determining an expected preload force in response to the operation of the driver.
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公开(公告)号：US11888428B2
公开(公告)日：2024-01-30
申请号：US18100119
申请日：2023-01-23
申请人： NIKE, Inc.
发明人： Summer L. Schneider
CPC分类号： H02P6/06 , A43B3/34 , A43C11/008 , A43C11/165 , G05B19/416 , H02K7/1166 , G05B2219/35585
摘要： Systems, apparatus, and methods related to an automated footwear platform including motor control techniques. The motor control techniques can include operations such as segmenting a pre-defined travel distance, defining a plurality of moves, creating a plurality of motion profiles, and commanding movements. The plurality of moves can utilize the segmented travel distance for a drive mechanism associated with the footwear platform. Each motion profile of the plurality of motion profiles can include one or more moves from the plurality of moves. Commanding movement of the drive mechanism can be based on selection of one or more motion profiles from the plurality of motion profiles.
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公开(公告)号：US11888427B2
公开(公告)日：2024-01-30
申请号：US17541200
申请日：2021-12-02
申请人： MITSUBA Corporation
发明人： Kota Fukashiro , Miya Yamada
CPC分类号： H02P6/06 , F04B49/065 , F04B49/20 , H02P6/28 , F04B17/03 , F04B2203/0201 , F04B2203/0209
摘要： A motor control device according to the disclosure includes: a current control part, performing current control for rotating a motor from a stop state; a rotation speed calculation part, calculating an actual rotation speed of the motor; an acquisition part, acquiring a target rotation speed of the motor; a speed control part, performing speed control of the motor, so that the actual rotation speed of the motor becomes the target rotation speed; and a correction part, at a time when a current control state is transitioned to a speed control, correcting the target rotation speed based on a relation between the actual rotation speed and the target rotation speed. When the target rotation speed is corrected, the speed control part performs the speed control so that the actual rotation speed becomes the target rotation speed corrected by the correction part.
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公开(公告)号：US20230361697A1
公开(公告)日：2023-11-09
申请号：US18221988
申请日：2023-07-14
申请人： Black & Decker Inc.
发明人： Shailesh P. WAIKAR , Zhi QU , Wing LIN , John C. VANKO
CPC分类号： H02P6/182 , H02P6/186 , H02P6/06 , B25D11/064 , H02P6/17 , B25F5/02 , H02P2203/03 , H02P2209/07 , H02P6/28 , H02P2203/09
摘要： 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.
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公开(公告)号：US20230336097A1
公开(公告)日：2023-10-19
申请号：US17719873
申请日：2022-04-13
发明人： Joseph Wilson Latham
CPC分类号： H02P6/06 , F25B49/025 , F25B2700/151 , F25B2600/021 , F25B2600/024 , F25B2700/171 , H02P2207/05
摘要： A method for operating an appliance motor includes receiving a target speed for the motor, obtaining a power limit for the motor, determining an inverter current limit based at least in part on the target speed and the power limit, determining an inverter output current to achieve the target speed, wherein the inverter output current is limited to the inverter current limit, and supplying the motor with the inverter output current.
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公开(公告)号：US11750123B1
公开(公告)日：2023-09-05
申请号：US17841699
申请日：2022-06-16
发明人： Ming-Fu Tsai
CPC分类号： H02P6/182 , H02P6/20 , H02P2203/03
摘要： A control circuit arranged to detect an initial rotor position of a brushless DC motor includes: a voltage integrator circuit, arranged to perform integration upon an input voltage, to generate a plurality of integrated voltages; a PWM generating circuit, arranged to generate and output a plurality of PWM signals to the brushless DC motor through a drive circuit, and stop outputting a PWM signal that is any of the plurality of PWM signals to the brushless DC motor according to an integrated voltage corresponding to the PWM signal; a current receiving circuit, arranged to receive a plurality of feedback currents from the brushless DC motor; a comparison circuit, arranged to perform comparison upon the plurality of feedback currents, to generate a comparison result; and a decision circuit, arranged to detect the initial rotor position according to the comparison result.
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公开(公告)号：US11374513B2
公开(公告)日：2022-06-28
申请号：US16255088
申请日：2019-01-23
发明人： Kamyar Khosravi , Masahira Kurihara
IPC分类号： H02P6/06 , H02P6/182 , H03K5/24 , H02M7/5387
摘要： A system for controlling a motor includes a motor having a plurality of phases, each phase comprising a coil having a first end coupled to a motor neutral point. A motor driver circuit is coupled to a second end of each coil to provide power to each coil. A motor controller circuit is coupled to the motor driver circuit to control the power that is provided to the motor. A comparator is coupled to compare a voltage at the motor neutral point to a voltage at the second end of each coil to detect a back-EMF polarity and produce a polarity signal representing the back-EMF polarity. A back-EMF filter circuit is coupled to receive the polarity signal and invert the polarity signal if the polarity signal does not match an expected value.
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9.发明授权公开(公告)号：US11371488B2
公开(公告)日：2022-06-28
申请号：US16484022
申请日：2018-01-09
发明人： Roland Zeichfüssl
摘要： The invention relates to an electric machine (2) comprising a stator (2) and a rotor that can rotate relative to the stator (2), the rotor (3) having a plurality of permanent magnets (5), also comprising a rotor cooling device (8) for cooling the rotor (3), wherein the rotor cooling device (8) comprises at least one cooling device (23) for providing a cooling air flow, said rotor cooling device (8) comprises a control device (22) which is designed to control at least one cooling device (23) for adjusting a coolant power provided by the cooling air flow.
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公开(公告)号：US11303235B2
公开(公告)日：2022-04-12
申请号：US16853140
申请日：2020-04-20
申请人： Black & Decker Inc.
摘要： A power tool is provided including a brushless motor having a stator defining a plurality of phases and a rotor. A power unit is provided including power switches operable to deliver power to the motor. A primary controller is interfaced with the power unit to output drive signals to drive the phases of the motor over a series of sectors of the rotor rotation. The primary controller measures a back-electromotive force voltage of the motor and transitions motor commutation from the present sector to the next sector based in relation to the back-EMF voltage. A second controller is provided to receive at least one of the drive signals, calculate a speed and/or direction of rotation of the motor from the drive signals, and take corrective action to cut off supply of power to the motor if it detects an overspeed condition or incorrect direction of rotation.
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