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. 19, 2009
Filed:
Nov. 17, 2006
Applicants:
Keiichi Ando, Anjo, JP;
Shinya Goto, Gifu, JP;
Koji Kawasaki, Anjo, JP;
Inventors:
Assignees:
Denso Corporation, Kariya, JP;
Nippon Soken, Inc., Nishio, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 3/335 (2006.01); G05F 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a DC-to-DC converter which can convert DC power supplied to a first voltage system circuit, having first and second switching elements, to DC power at a boosted voltage, produced from a second voltage system circuit having third and fourth switching elements, with conversion performed based on control of a switching sequence of the switching elements, the sequence is designed such that switch-off of each of the first and second switching elements occurs only when the current flowing in the switching element is close to zero, thereby suppressing occurrence of voltage surges at switch-off.