The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 2019
Filed:
Feb. 21, 2017
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 6/16 (2016.01); H02K 29/08 (2006.01); H02P 6/182 (2016.01);
U.S. Cl.
CPC ...
H02P 6/16 (2013.01); H02K 29/08 (2013.01); H02P 6/182 (2013.01);
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 P, P, P, P, P, and Pas 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 P, P, P, P, P, and Pis 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.