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:
Jun. 28, 2016
Filed:
Dec. 20, 2012
Applicant:
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Inventor:
Yukihiro Nishikawa, Hino, JP;
Assignee:
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 3/335 (2006.01); H02M 1/08 (2006.01); H02M 1/088 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H02M 3/33507 (2013.01); H02M 1/081 (2013.01); H02M 1/088 (2013.01); H02M 3/3353 (2013.01); H02M 3/33553 (2013.01); H02M 3/33569 (2013.01); H02M 2001/0003 (2013.01); H02M 2001/0032 (2013.01); H02M 2001/0058 (2013.01); Y02B 70/1433 (2013.01); Y02B 70/16 (2013.01);
Abstract
A control device is configured to, when the direct current output voltage of a resonant DC-DC converter is of a value that exceeds the maximum value that can be output in a fixed frequency control region, there is a switch from fixed frequency control to frequency modulation control. Because of this, conduction loss and turn-off loss caused by backflow current among semiconductor switching elements of the resonant DC-DC converter are reduced, power conversion efficiency is improved, and the range of voltage that can be output by the resonant DC-DC converter is expanded.