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. 19, 2017
Filed:
May. 25, 2016
Tdk Corporation, Tokyo, JP;
Wataru Nakahori, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
Provided is a switching power supply unit that includes a pair of input terminals, a pair of output terminals, two transformers, two inverter circuits, a rectifying smoothing circuit, and a driver. The rectifying smoothing circuit includes eight rectifying devices, a first choke coil, a second choke coil, and a capacitance. In the rectifying smoothing circuit, two full-bridge rectifying circuits are provided that each include a first arm and a second arm. The first arm and the second arm each have two of the eight rectifying devices. Secondary windings of the respective two transformers are each coupled to corresponding one of the two full-bridge rectifying circuits to form an H-bridge coupling. Coupling relation of the first arm, the second arm, the first choke coil, the second choke coil, and the capacitance is appropriately defined.