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1080 条记录 (耗时 0.026 秒)

    ELECTRIC TOOL AND CONTROL METHOD THEREFOR
    2.
    发明公开
    ELECTRIC TOOL AND CONTROL METHOD THEREFOR 审中-实审

    公开(公告)号：EP4340208A1

    公开(公告)日：2024-03-20

    申请号：EP22928395.7

    申请日：2022-12-14

    申请人： Nanjing Chervon Industry Co., Ltd.

    发明人： WANG, Hailong ,  XU, Tianxiao

    IPC分类号： H02P6/20 ,  H02P6/08 ,  H02P29/68 ,  B25B21/00 ,  B25B23/00

    摘要： Provided are a power tool and a control method therefor. The power tool includes an operating switch; a motor that is connected to the operating switch and capable of starting in response to the conduction of the operating switch and braking in response to the disconnection of the operating switch; and a control circuit configured to control a working state of the motor. The control circuit includes a driver circuit including multiple switching elements; a controller that is coupled to the motor and capable of outputting a first control signal to control the motor to start; and a parameter detection unit for detecting a working parameter of the motor. The controller is configured to, in response to the operating switch being turned on again within a preset time after being turned off, acquire the working parameter and set a duty cycle of a second control signal according to the working parameter to control the motor to restart.

    DEVICE AND METHOD FOR CONTROLLING A MOTOR, ESPECIALLY OF A WASHING MACHINE
    5.
    发明公开
    DEVICE AND METHOD FOR CONTROLLING A MOTOR, ESPECIALLY OF A WASHING MACHINE 审中-公开

    公开(公告)号：EP4152592A1

    公开(公告)日：2023-03-22

    申请号：EP21197773.1

    申请日：2021-09-20

    申请人： Vestel Elektronik Sanayi ve Ticaret A.S.

    发明人： KARATAS, Mustafa

    IPC分类号： H02P6/08

    摘要： The present disclosure relates to a method and a device (100) for controlling a motor (101) configured to rotate a cavity unit (102), especially a basket (202) of a washing machine (200) or a dryer, whereas the cavity unit (102) is rotatable by the motor (101) via a mechanical shaft (103) coupling the motor (101) and the cavity unit (102), comprising at least one sensor (104) configured to detect a radial shaft position in a cross-sectional plane (P) of the shaft during rotation of the cavity unit (102), comprising a control unit (105) connected to the at least one sensor (104), whereas the control unit (105) is configured to provide pulse width modulated signals (PWM1, PWM2, PWM3, PWM4, PWM5) to the motor (101) for controlling the motor (101) based on the detected radial shaft position, whereas the control unit (105) is configured to provide such pulse width modulated signals (PWM1, PWM2, PWM3, PWM4, PWM5) that the radial shaft position approaches a desired radial shaft position during rotation of the cavity unit (102).

    AC POWER TOOL AND METHOD FOR STARTUP THEREOF
    8.
    发明公开
    AC POWER TOOL AND METHOD FOR STARTUP THEREOF 审中-公开

    公开(公告)号：EP4020786A1

    公开(公告)日：2022-06-29

    申请号：EP19942221.3

    申请日：2019-08-21

    申请人： Nanjing Chervon Industry Co., Ltd.

    发明人： XU, Tianxiao ,  FENG, Jifeng

    IPC分类号： H02M7/48 ,  H02P6/08 ,  H02P6/10 ,  H02P6/06

    摘要： Provided is an alternating current power tool. The alternating current power tool includes a brushless motor, a power module, a voltage conversion module, a drive circuit, and a controller. The power module is configured to receive an alternating current to supply power to the stator winding. The voltage conversion module is configured to receive the alternating current received by the power module and operatively output a direct current bus voltage. The drive circuit is electrically connected to the power conversion module and configured to drive the brushless motor. The controller is configured to start timing when the alternating current received by the power module crosses through a point of zero. In a preset time interval [T1, T2] of each half cycle, a first control signal is outputted to the drive circuit to power on the stator winding. The starting time of the preset time interval is T1, and the cut-off time of the preset time interval is T2.