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:
Apr. 01, 2008
Filed:
Mar. 02, 2004
Takashi Kambara, Ikeda, JP;
Takashi Kambara, Ikeda, JP;
Matsushita Electric Works, Ltd., Osaka, JP;
Abstract
A DC-DC converter reduces a surge voltage developed across a switching element () in making the voltage conversion with the use of a transformer () inherently having considerable leakage. A snubber circuit is included to absorb the surge energy and transferring it to a load, or output end of the converter, reducing the surge voltage across the switching element (). A snubber capacitor () is provided to absorb the surge energy developed by the transformer () when the switching element () is off. Thus absorbed energy is collected in a storage capacitor () through a reactor () while the switching element () is on and off, and is then transferred from the storage capacitor () to the load, i.e., the output side of the converter, leaving only a minimum voltage being applied across the switching element ().