Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Reexamination Certificate
2007-01-29
2010-10-12
Vu, Bao Q (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
C323S232000, C323S271000, C323S282000
Reexamination Certificate
active
07812575
ABSTRACT:
A bidirectional DC-DC converter10has smoothing capacitors Cs1and Cs2, a smoothing reactor Ls, resonant reactors Lr1and Lr2, and a resonant capacitor Cr, as well as insulated gate bipolar transistors (IGBTs) Q1, Q2, and Q3to which buffer capacitors C1, C2, and C3are connected in parallel and diodes D1, D2, and D3are connected in a back-to-back configuration. After part of the energy stored in the smoothing reactor Ls and/or resonant reactors Lr1and Lr2draws charges in the buffer capacitor C3and is stored in the resonant capacitor Cr, the energy is stored in the resonant reactors Lr1and Lr2. The energy is used to draw charges in the buffer capacitors C1and C2, achieving soft switching of IGBTs Q1, Q2, and Q3.
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Hamaogi Masahiro
Shimada Takae
Shoji Hiroyuki
Taniguchi Kimiaki
Antonelli, Terry Stout & Kraus, LLP.
Hitachi Computer Peripherals Co., Ltd.
Tran Nguyen
Vu Bao Q
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