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    SMALL ELECTRIC APPLIANCE WITH IMPROVED MOTOR SPEED CONTROL
    4.
    发明公开
    SMALL ELECTRIC APPLIANCE WITH IMPROVED MOTOR SPEED CONTROL 审中-公开

    公开(公告)号：EP4243276A1

    公开(公告)日：2023-09-13

    申请号：EP23160866.2

    申请日：2023-03-09

    申请人： Braun GmbH

    发明人： HERMANN, Ferdinand ,  KLEMM, Torsten ,  SCHMITT, Timo

    IPC分类号： H02P7/29 ,  A61C17/22 ,  B26B19/28

    摘要： The present invention relates to a small electrical appliance (1, 1'), wherein the small electrical appliance (1) is a hair removal device (1), such as an electric shaver or epilator, or an electric toothbrush (1'). A small electrical appliance (1, 1'), being a hair removal device (1) or toothbrush (1'), is provided comprising an electric DC motor (5); a detector (10) for acquiring a detector signal indicative of a rotational speed of the electric DC motor (5); and a controller (20) for controlling the electric DC motor (5). The controller is adapted to: determine, based on the detector signal, a first parameter indicative of the rotational speed of the DC motor (5); determine, based on the detector signal, a second parameter indicative of the rotational speed of the DC motor (5), wherein the second parameter is different from the first parameter, and wherein the second parameter is determined based on a frequency domain analysis of the detector signal; and adjust a supply voltage of the electric DC motor (5) based on the first parameter and the second parameter. The controller (20) is adapted to perform coarse control for adjusting the supply voltage based on the first parameter and to perform fine control for adjusting the supply voltage based on the second parameter. The present disclosure further relates to a corresponding method.

    ELECTRIC TOOL AND CONTROL METHOD THEREFOR
    5.
    发明公开
    ELECTRIC TOOL AND CONTROL METHOD THEREFOR 审中-公开

    公开(公告)号：EP4236060A1

    公开(公告)日：2023-08-30

    申请号：EP21913582.9

    申请日：2021-11-19

    申请人： Nanjing Chervon Industry Co., Ltd.

    发明人： FENG, Jifeng ,  FAN, Xiancheng ,  GUO, Zengbing

    IPC分类号： H02P7/29 ,  H02P3/14 ,  H02P3/18 ,  H02P6/08 ,  H02P6/20 ,  A01D34/78 ,  A01D69/02

    摘要： Provided are a power tool and a control method therefor. The tool includes an electric motor; a battery pack for providing a power supply; a switching circuit for outputting a power-on signal or a shutdown signal; a first switching device for controlling a power-on state of the electric motor; a second switching device for driving the electric motor to rotate; and a controller electrically connected to at least the first switching device, the switching circuit, and the second switching device. The controller is configured to, when the power-on signal is detected, control the first switching device and the second switching device to control, in a first working mode, the electric motor to rotate and when the shutdown signal is detected, control the first switching device and the second switching device to control, in a second working mode, the electric motor to rotate.

    MOTOR DRIVE SYSTEM AND MOTOR DRIVE METHOD
    6.
    发明公开
    MOTOR DRIVE SYSTEM AND MOTOR DRIVE METHOD 审中-公开

    公开(公告)号：EP4156497A1

    公开(公告)日：2023-03-29

    申请号：EP22164753.0

    申请日：2022-03-28

    申请人： Zeng Hsing Industrial Co., Ltd.

    发明人： YANG, Chin-Shu ,  WU, Chih-Huang

    IPC分类号： H02P7/03 ,  H02P7/06 ,  H02P7/28 ,  H02P7/29 ,  H02P7/292

    摘要： A motor drive system includes a rectifier circuit (1), a controller (2), a modulator circuit (3) and a direct current (DC) motor (8). The rectifier circuit (1) is configured to convert an alternating current (AC) voltage to a DC voltage. The controller (2) is configured to output a control signal. The modulator circuit (3) includes a pulse generation module (4), a feedback determination module (5), a pulse modulation module (6) and a driving module (7), and is configured to generate a modulated DC driving signal based on the DC voltage and the control signal generated by the rectifier circuit (1) and the controller (2). The DC motor (8) is configured to operate in accordance with the modulated DC driving signal generated by the modulator circuit (3).

    ANSTEUERVERFAHREN UND ANSTEUEREINHEIT FÜR EINEN GLEICHSTROMPUMPENMOTOR
    9.
    发明公开
    ANSTEUERVERFAHREN UND ANSTEUEREINHEIT FÜR EINEN GLEICHSTROMPUMPENMOTOR 审中-公开

    公开(公告)号：EP3696968A1

    公开(公告)日：2020-08-19

    申请号：EP19157725.3

    申请日：2019-02-18

    申请人： Baier + Köppel GmbH & Co. KG

    发明人： KÖPPEL, Bernhard ,  REDEL, Andreas

    IPC分类号： H02P27/08 ,  F02M37/08 ,  H02P7/29

    摘要： Die Erfindung betrifft ein Verfahren zum Ansteuern eines Gleichstrompumpenmotors (4), vorzugsweise eines bürstenbehafteten Gleichstrommotors zum Pumpen von Schmierstoff, der mit einem pulsweitenmodulierten (PWM-)Steuersignal angesteuert wird,
    wobei in einem Erfassungsschritt aktuelle Parameter erfasst werden und anhand der erfassten Parameter in einem Anpassungsschritt ein Tastgrad (D) des PWM-Steuersignals (S PWM ) angepasst und/oder verändert wird, wobei die Erfassung aktueller Parameter mindestens die Erfassung einer aktuellen Eingangsspannung (U B ) umfasst.