Electrical transmission or interconnection systems – Miscellaneous systems – For particular load device
Reexamination Certificate
2005-08-18
2009-12-29
Fleming, Fritz M (Department: 2836)
Electrical transmission or interconnection systems
Miscellaneous systems
For particular load device
Reexamination Certificate
active
07638904
ABSTRACT:
The DC-DC converter connects a first and a second switching circuit for converting power mutually between direct current and alternating current respectively to a first DC power source and a second DC power source and has a transformer between the AC terminals thereof. Here, between the AC terminals of the second switching circuit and the negative pole terminal of the DC power source, a voltage clamp circuit composed of a series unit of switching devices with a reverse parallel diode and a clamp condenser is connected.An isolated bidirectional DC-DC converter which prevents a reduction in a circulating current at time of buck and an occurrence of a surge voltage at time of voltage boost and realizes highly efficiency, low noise, and miniaturization is provided.
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Higuchi Katsuhiro
Kanouda Akihiko
Saito Ryuichi
Shoji Hiroyuki
Yukutake Seigou
Crowell & Moring LLP
Fleming Fritz M
Hitachi , Ltd.
Parries Dru M
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