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:
Sep. 24, 2013
Filed:
Oct. 27, 2009
Yoichi Kyono, Niiza, JP;
Yoichi Kyono, Niiza, JP;
Sanken Electric Co., Ltd., Niiza-shi, JP;
Abstract
A switching power-supply apparatus includes a first converter, a second converter, an output smoothing capacitor Co, a series resonance circuitand a control circuit. The first converter, in which switching elements Qand Qare connected to both ends of a direct-current power-supply Vin in series, and a capacitor Ciand a primary winding Npof a transformer Tincluding an auxiliary winding Naare connected to both ends of the switching element Qin series, includes diodes Dand Dthat rectify voltages generated in secondary windings Nsand Nsof the transformer T. The second converter, in which switching elements Qand Qare connected to the both ends of the direct-current power-supply Vin in series, and a capacitor Ciand a primary winding Npof a transformer Tare connected to both ends of the switching element Qin series, includes diodes Dand Dthat rectify voltages generated in secondary windings Nsand Nsof the transformer T. The output smoothing capacitor Cosmoothes currents output from the diodes D, D, Dand D. The series resonance circuitincludes a resonance reactor Land a resonance capacitor Cconnected to the auxiliary winding Nain series. The control circuitturns on/off the switching elements Qand Qaccording to a current flowing in the series resonance circuit