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:
Feb. 13, 2018
Filed:
Feb. 12, 2016
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Katsunori Imai, Tokyo, JP;
Kenji Furukawa, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/335 (2006.01); H02M 1/00 (2006.01); H02M 7/537 (2006.01); H02M 7/48 (2007.01);
U.S. Cl.
CPC ...
H02M 7/537 (2013.01); H02M 2007/4815 (2013.01); Y02B 70/1441 (2013.01);
Abstract
A resonance inverter includes a first coil provided between an input terminal and a switch element, a first capacitor provided between the drain and the source of the switch element, a second capacitor serially connected between the drain and the source of the switch element, and a second coil. A drain-source voltage of a switch element can be effectively lowered, by setting a serial resonance frequency based on the second coil and the second capacitor to a value higher than twice of a driving frequency, and lower than 2.75 times thereof.