公开(公告)号：US20180289229A1

公开(公告)日：2018-10-11

申请号：US15766701

申请日：2016-10-07

Applicant: LG Electronics Inc. ,  Seoul National University R&DB Foundation

Inventor： Jongwon KIM ,  Jungdae LEE ,  Myungkeun YOO ,  Junho AHN ,  Jungik HA ,  Sungho JUNG ,  Jaeyong PARK

IPC: A47L9/28 ,  H02P21/14 ,  H02P27/06

Abstract: The present invention relates to a motor driving apparatus and a home appliance comprising the same. The motor driving apparatus according to an embodiment of the present invention comprises: an inverter which converts a direct current power source of a DC stage capacitor to an alternating current power source and outputs the converted alternating power source to a motor by a switching operation; a DC stage resistance device arranged between the DC stage capacitor and the inverter; and a control unit which controls the inverter on the basis of phase current sampled by means of the DC stage resistance device, wherein the control unit controls the frequency of voltage applied to the motor or the rotation frequency of the motor to be synchronized with the sampling frequency of the phase current sampled via the DC stage resistance device. Accordingly, it is possible to accurately calculate the phase current flowing through the motor by means of the DC stage resistance device.

公开(公告)号：US20220085744A1

公开(公告)日：2022-03-17

申请号：US17295217

申请日：2019-01-07

Applicant: LG ELECTRONICS INC.

Inventor： Jungdae LEE ,  Sanggi KO ,  Jaeyoon OH ,  Gilsu LEE

IPC: H02P27/06 ,  H02M1/14

Abstract: The present specification relates to a motor control device, a motor control system, and a motor control method. The motor control device measures a ripple voltage of a DC link capacitor to determine an appropriate switching frequency according to the ripple voltage, and causes a plurality of arithmetic processing units to selectively control a switching operation of the switching unit according to the determined switching frequency.