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Patent Searching and Data


Title:
MOTOR DRIVE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/009644
Kind Code:
A1
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 current 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.

Inventors:
JUNG, Hansu (IP Center, LG Electronics Inc. 51, Gasan digital 1-ro,Geumcheon-gu, Seoul, 08592, KR)
CHO, Seokhee (IP Center, LG Electronics Inc. 51, Gasan digital 1-ro,Geumcheon-gu, Seoul, 08592, KR)
JE, Jungmoon (IP Center, LG Electronics Inc. 51, Gasan digital 1-ro,Geumcheon-gu, Seoul, 08592, KR)
Application Number:
KR2018/007637
Publication Date:
January 10, 2019
Filing Date:
July 05, 2018
Export Citation:
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Assignee:
LG ELECTRONICS INC. (128 Yeoui-daero, Yeongdeungpo-gu, Seoul, 07336, KR)
International Classes:
H02P6/20; H02P3/14; H02P6/18
Foreign References:
KR20130031728A2013-03-29
KR20100041794A2010-04-22
KR20160098886A2016-08-19
JP2013198235A2013-09-30
KR101652061B12016-08-30
Attorney, Agent or Firm:
DAE-A INTELLECTUAL PROPERTY CONSULTING (3F Hanyang Bldg, 123 Yeoksam-roGangnam-gu, Seoul, 06243, KR)
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