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. 31, 2022
Filed:
Dec. 12, 2019
Applicant:
Nabtesco Corporation, Tokyo, JP;
Inventors:
Assignee:
NABTESCO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/5395 (2006.01); H02M 1/44 (2007.01);
U.S. Cl.
CPC ...
H02M 7/5395 (2013.01); H02M 1/44 (2013.01);
Abstract
A three-phase AC control apparatus includes: an equal duty sensing circuit; and a PWM signal control circuit. The equal duty sensing circuit senses whether any two of a U-phase, a V-phase, and a W-phase of a three-phase AC current have an equal duty value. The PWM signal control circuit outputs, when it is sensed that any two of the U-phase, the V-phase, and the W-phase of the three-phase AC current have the equal duty value, a control signal that shifts a timing of start and a timing of stop of one of the two phases having the equal duty value.