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:
Oct. 12, 2010
Filed:
Jan. 29, 2007
Takae Shimada, Hitachi, JP;
Hiroyuki Shoji, Hitachi, JP;
Masahiro Hamaogi, Odawara, JP;
Kimiaki Taniguchi, Nakai, JP;
Takae Shimada, Hitachi, JP;
Hiroyuki Shoji, Hitachi, JP;
Masahiro Hamaogi, Odawara, JP;
Kimiaki Taniguchi, Nakai, JP;
Hitachi Computer Peripherals Co., Ltd., Kanagawa, JP;
Abstract
A bidirectional DC-DC converterhas smoothing capacitors Csand Cs, a smoothing reactor Ls, resonant reactors Lrand Lr, and a resonant capacitor Cr, as well as insulated gate bipolar transistors (IGBTs) Q, Q, and Qto which buffer capacitors C, C, and Care connected in parallel and diodes D, D, and Dare connected in a back-to-back configuration. After part of the energy stored in the smoothing reactor Ls and/or resonant reactors Lrand Lrdraws charges in the buffer capacitor Cand is stored in the resonant capacitor Cr, the energy is stored in the resonant reactors Lrand Lr. The energy is used to draw charges in the buffer capacitors Cand C, achieving soft switching of IGBTs Q, Q, and Q