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:
May. 20, 2025
Filed:
Jul. 30, 2021
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventor:
Satoshi Furukawa, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 27/06 (2006.01); H02P 21/22 (2016.01);
U.S. Cl.
CPC ...
H02P 27/06 (2013.01); H02P 21/22 (2016.02);
Abstract
There is provided a motor drive device that drives a motor using a three-phase alternating current as a power source. The motor drive device includes a rectifier circuit that rectifies the three-phase alternating current, a current detection circuit that detects a current of a direct current rectified by the rectifier current, and a cross point detection circuit that detects a cross point between the current detected by the current detection circuit and a predetermined current value, and outputs a control signal indicating whether or not to drive the motor based on a detection result.