公开(公告)号：US20200162008A1

公开(公告)日：2020-05-21

申请号：US16629267

申请日：2018-07-05

Applicant: LG Electronics Inc.

Inventor： Hansu JUNG ,  Seokhee CHO ,  Jungmoon JE

IPC: H02P27/12 ,  H02P21/18 ,  H02P21/22 ,  H02P21/36

Abstract: 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.

公开(公告)号：US20190127903A1

公开(公告)日：2019-05-02

申请号：US16094613

申请日：2017-04-18

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon JE ,  Chungill LEE ,  Kiwook LEE

IPC: D06F37/30 ,  D06F39/08 ,  D06F33/02 ,  H02P27/12 ,  H02P21/14 ,  H02P21/18 ,  H02P21/22

Abstract: Disclosed is a drain pump driving apparatus and a laundry treatment machine including the same. The laundry treatment machine includes: a drain pump driving apparatus configured to drive a drain pump, wherein the drain pump driving apparatus includes: a motor to drive the drain pump; an inverter to convert a direct current (DC) power to an alternating current (AC) power by a switching operation, and output the converted AC power to the motor; an output current detector to detect an output current flowing to the motor; and a controller configured to control the inverter, wherein the controller is further configured to calculate a speed of the motor based on an output current, and calculate a lift, which is a difference between a water level of a water introduction part through which water flows into the drain pump and s water level of a water discharge part for discharging water from the drain pump, based on the calculated speed.

公开(公告)号：US20170070172A1

公开(公告)日：2017-03-09

申请号：US15205638

申请日：2016-07-08

Applicant: LG ELECTRONICS INC. ,  Pusan National University Industry-University Cooperation Foundation

Inventor： Jungmoon JE ,  Hansu JUNG ,  Chungill LEE ,  Jangmok KIM ,  Hyunkeun KU ,  Hanbeom YEOM

IPC: H02P21/24 ,  H02P6/18 ,  H02P27/08

CPC classification number: H02P21/24 ,  H02M7/00 ,  H02P6/17 ,  H02P6/18 ,  H02P6/28 ,  H02P21/22 ,  H02P27/08

Abstract: The present invention relates to a motor driving apparatus and a home appliance including the same. A motor driving apparatus according to an embodiment of the present invention includes an inverter for converting a DC voltage of a DC-link capacitor into an AC voltage according to a switching operation and outputting the converted AC voltage to a motor; a DC-link resistor disposed between the DC-link capacitor and the inverter; and a controller for controlling the inverter based on a phase current sampled through the DC-link resistor, wherein the controller estimates a phase current based on the phase current sampled through the DC link resistor, in an interval in which phase current detection is not possible. Thereby, the phase current flowing through the motor may be accurately calculated using the DC link resistor.

Abstract translation: 电动机驱动装置及家用电器技术领域本发明涉及一种电动机驱动装置及其制造方法。 根据本发明的实施例的电动机驱动装置包括：逆变器，用于根据开关操作将直流母线电容器的直流电压转换为交流电压，并将转换的交流电压输出到电动机; 设置在DC链路电容器和逆变器之间的直流链路电阻器; 以及控制器，用于基于通过直流链路电阻器采样的相电流来控制逆变器，其中控制器在不可能进行相电流检测的间隔中基于通过直流链路电阻器采样的相电流来估计相电流 。 因此，可以使用直流链路电阻器精确地计算流过马达的相电流。