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1. (WO2013111575) MOTOR DRIVE DEVICE AND REFRIGERATOR UTILIZING SAME

Pub. No.:    WO/2013/111575    International Application No.:    PCT/JP2013/000301
Publication Date: Fri Aug 02 01:59:59 CEST 2013 International Filing Date: Thu Jan 24 00:59:59 CET 2013
IPC: H02P 6/18
H02P 27/06
Applicants: PANASONIC CORPORATION
パナソニック株式会社
Inventors: TANAKA, Hidehisa
田中 秀尚
MAEDA, Shiro
前田 志朗
TAKEOKA, Yoshinori
竹岡 義典
Title: MOTOR DRIVE DEVICE AND REFRIGERATOR UTILIZING SAME
Abstract:
This motor drive device has: a position detection means (5) that detects a rotational position from a counter electromotive voltage generated by the rotation of a brushless DC motor (4); and an inverter (3) that generates a waveform with an arbitrary frequency on the basis of a position detection signal and drives the brushless DC motor (4). The position detection means (5) has: a phase voltage detection unit (5a) for detecting voltages of respective phases of the brushless DC motor (4); a reference voltage setting unit (5c) for setting a reference voltage; a filter unit (5b) for removing high-frequency components; and a comparison unit (5d) for comparing outputs of the reference voltage setting unit (5c) and the filter unit (5b).