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18 条记录 (耗时 0.017 秒)

    Motor drive apparatus and control method thereof
    4.
    发明授权
    Motor drive apparatus and control method thereof 有权

    公开(公告)号：US11139760B2

    公开(公告)日：2021-10-05

    申请号：US16767934

    申请日：2018-11-27

    申请人： LG Electronics Inc.

    发明人： Hansu Jung ,  Dongwook Kim ,  Minho Jang

    IPC分类号： H02P27/06 ,  H02P3/22 ,  H02P21/18 ,  H02P3/18 ,  H02M7/537

    摘要： A motor drive apparatus includes: a DC-side capacitor charged with direct current power; an inverter unit comprising multiple top switches and bottom switches, performing a switching operation so as to convert power stored in the DC-side capacitor into alternating current power, and outputting the converted alternating current power to a motor; a shunt resistor for detecting a current flowing through the DC-side capacitor; and a controller for controlling the inverter unit to perform dynamic braking for stopping the motor. Before the dynamic braking is performed, the controller controls the inverter unit to gradually increase a phase current flowing through the bottom switches.

    Vacuum cleaner and method for controlling the same
    5.
    发明授权
    Vacuum cleaner and method for controlling the same 有权

    公开(公告)号：US10646087B2

    公开(公告)日：2020-05-12

    申请号：US15556128

    申请日：2016-03-07

    申请人： LG ELECTRONICS INC.

    发明人： Seongwoo Kim ,  Hansu Jung ,  Chungill Lee

    IPC分类号： A47L9/28 ,  B25J13/08 ,  G05D1/02 ,  A47L5/36 ,  A47L9/00

    摘要： Provided is a vacuum cleaner. The vacuum cleaner includes a cleaner body including a moving device for moving, a suction device connected to the cleaner body to suction dusts and air and guide the suctioned dusts and air to the cleaner body, the suction device including a handle, a detection device for detecting a distance between the handle and the cleaner body, and a controller determining whether movement of cleaner body is necessary on the basis of the distance between the cleaner body and the handle, the controller controlling the moving device when the movement of the cleaner body is necessary. The controller controls the moving device to allow the cleaner body to avoid an obstacle when it is determined that an operation for avoiding the obstacle is necessary while the moving device operates.

    Motor driving apparatus and laundry treatment machine including the same
    6.
    发明授权
    Motor driving apparatus and laundry treatment machine including the same 有权

    公开(公告)号：US09708745B2

    公开(公告)日：2017-07-18

    申请号：US14535702

    申请日：2014-11-07

    申请人： LG ELECTRONICS INC.

    发明人： Hansu Jung ,  Soongkeun Lee ,  Minho Jang

    IPC分类号： D06F37/30 ,  D06F33/02 ,  H02P6/18 ,  H02P6/182

    CPC分类号： D06F37/304 ,  D06F33/02 ,  D06F2202/12 ,  D06F2204/10 ,  H02P6/182 ,  Y02B40/52

    摘要： The laundry treatment machine; absent a position sensor to sense a rotor position, includes a driving unit having a DC/AC inverter, an output voltage detection unit to detect output voltage applied to the motor, and an inverter controller to control the inverter to drive the motor based on the output voltage. The output voltage detection unit includes a plurality of resistors electrically connected between the inverter and the motor and a comparator to compare voltage detected by some of the resistors with reference voltage and to detect pulse width modulation (PWM)-based output voltage. Based on the PWM-based output voltage at least one switching device of the inverter is turned on. The output voltage detection unit outputs voltage detected by other some of the resistors to the inverter controller in a second mode in which all switching devices of the inverter are turned off.

    MOTOR DRIVING APPARATUS AND LAUNDRY TREATMENT MACHINE INCLUDING THE SAME
    7.
    发明申请
    MOTOR DRIVING APPARATUS AND LAUNDRY TREATMENT MACHINE INCLUDING THE SAME 有权
    电机驱动装置和洗衣机包括相同

    公开(公告)号：US20150128660A1

    公开(公告)日：2015-05-14

    申请号：US14535595

    申请日：2014-11-07

    申请人： LG ELECTRONICS INC.

    发明人： Hansu Jung ,  Jain Koo ,  Soongkeun Lee

    IPC分类号： D06F37/30 ,  H02P6/20 ,  D06F33/02

    CPC分类号： D06F37/304 ,  D06F33/02 ,  H02P6/182 ,  H02P6/21 ,  H02P21/34

    摘要： The laundry treatment machine includes an inverter to convert direct current (DC) voltage into alternating current (AC) voltage and to output the AC voltage to a motor. The laundry treatment machine includes an inverter controller to control the inverter to supply current corresponding to a direction opposite to back electromotive force generated from the motor to the motor so as to align the motor during a starting operation of the motor. It is feasible to rapidly align a rotor of the motor during the starting operation of the motor.

    摘要翻译： 洗衣机包括将直流（DC）电压转换为交流（AC）电压并将AC电压输出到电动机的逆变器。 衣物处理机包括逆变器控制器，用于控制逆变器将与从电动机产生的反电动势相反的方向的电流提供给电动机，以便在电动机的起动操作期间对准电动机。 在马达的启动运行过程中，马达的转子快速对准是可行的。

    Motor drive apparatus
    8.
    发明授权
    Motor drive apparatus 有权

    公开(公告)号：US11258393B2

    公开(公告)日：2022-02-22

    申请号：US16629267

    申请日：2018-07-05

    申请人： LG Electronics Inc.

    发明人： Hansu Jung ,  Seokhee Cho ,  Jungmoon Je

    IPC分类号： H02P21/36 ,  H02P27/08 ,  H02P27/12 ,  H02P21/18 ,  H02P21/22

    摘要： The present invention relates to a motor drive apparatus and, more particularly, to a motor drive apparatus capable of immediately restarting by maintaining sensorless control during a stop operation of a motor. The motor drive apparatus comprises: an inverter for driving a motor by using an AC voltage; and a control unit for controlling operations of a switching element included in the inverter. At this time, when a stop command is input, the control unit decreases a duty ratio of a PWM signal until a present speed of the motor becomes smaller than a predetermined minimum speed, thereby decreasing the revolutions per minute of the motor. Then, when a restart command is input in a state where the duty ratio of the PWM signal is decreased, the control unit can immediately restart the motor by increasing the duty ratio of the PWM signal.