公开(公告)号：US10355627B2

公开(公告)日：2019-07-16

申请号：US16079903

申请日：2017-02-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akihiro Ochiai ,  Yasushi Kato ,  Masahiro Yasohara

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.