Invention Grant
- Patent Title: Motor drive circuit, brushless motor drive device provided with motor drive circuit, and motor control method
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Application No.: US16079903Application Date: 2017-02-21
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Publication No.: US10355627B2Publication Date: 2019-07-16
- Inventor: Akihiro Ochiai , Yasushi Kato , Masahiro Yasohara
- Applicant: Panasonic Intellectual Property Management Co., Ltd.
- Applicant Address: JP Osaka
- Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: McDermott Will & Emery LLP
- Priority: JP2016-049293 20160314
- International Application: PCT/JP2017/006272 WO 20170221
- International Announcement: WO2017/159230 WO 20170921
- Main IPC: H02P6/16
- IPC: H02P6/16 ; H02K29/08 ; H02P6/182

Abstract:
A motor drive circuit includes; a rotor position detector that detects a position of a rotor and outputs a rotor position detection signal; a rotor position signal generator that generates signals P1, P2, P3, P4, P5, and P6 as a rotor position signal based on the rotor position detection signal output from the rotor position detector; a rotation direction recognition unit that recognizes a rotation direction of the rotor each time one of signals P1, P2, P3, P4, P5, and P6 is input and replaces the rotor position signal with a corrected rotor position signal; and a winding current output unit that outputs a current to a winding based on the corrected rotor position signal.
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