Motor driving apparatus and laundry treatment machine including the same

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United States of America Patent

PATENT NO 9765468
APP PUB NO 20150128662A1
SERIAL NO

14536004

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The laundry treatment machine, absent a position sensor to sense the rotor position of a motor, includes a driving unit having an DC/AC inverter, an voltage detection unit to detect output voltage, and an inverter controller to control the inverter. The output voltage detection unit includes a plurality of resistors 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. The voltage detection unit outputs the PWM-based output voltage output from the comparator to the inverter controller in a first mode in which at least one switching device of the inverter is turned on. The 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.

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Patent Owner(s)

  • LG ELECTRONICS INC.;SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION;LG ELECTRONICS INC. SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chee, Seungjun Seoul, KR 1 8
Jang, Minho Changwon-si, KR 33 58
Kim, Kyunghoon Changwon-si, KR 44 194
Sul, Seungki Seoul, KR 4 11
Yu, Jayeong Seoul, KR 1 8

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