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:
Mar. 04, 2008
Filed:
Apr. 05, 2006
Masayuki Yasumura, Kanagawa, JP;
Masayuki Yasumura, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
The present invention provides a voltage resonant converter that achieves ZVS over the entire allowable load range. A switching power supply circuit includes a class-E resonant converter as its primary-side switching converter that is supplied with a DC input voltage arising from the rectification and smoothing of a commercial AC voltage by a rectifier circuit (including a smoothing capacitor Ci). A choke coil of a primary-side series resonant circuit in the class-E switching converter is used as a primary winding Nin an isolation converter transformer PIT. The total coupling coefficient between the primary side and secondary side is set to about 0.65 by the coupling coefficient of the isolation converter transformer PIT itself and equivalent parallel connection between a choke coil Land the primary winding N. The resonant frequency foof a primary-side parallel resonant circuit and the resonant frequency foof the primary-side series resonant circuit are set to almost the same value of about 60 kHz.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile