DC conversion apparatus

Details DC conversion apparatus DC conversion apparatus

2007-05-15

2007-05-15

Laxton, Gary L. (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S127000

Reexamination Certificate

active

11302234

ABSTRACT:
A DC conversion apparatus includes a switch that converts a DC voltage of a DC power source to a high-frequency voltage by being turned ON/OFF via a primary winding of a transformer, a synchronous rectifying circuit that performs synchronous rectification of a high-frequency voltage generated at a secondary winding, a smoothing circuit that smoothes a rectified output of the synchronous rectifying circuit by a smoothing reactor and a smoothing capacitor, and outputs a DC voltage, a capacitor that stores via a diode, energy stored in the smoothing rector due to a current backflow of the synchronous rectifying circuit under light load condition, a switch that is turned ON in synchronization with the switch, and returns the energy stored in the capacitor via the transformer to a primary side thereof, and a control circuit that turns ON/OFF the switch.

REFERENCES:
patent: 6011903 (2000-01-01), Nosenchuck
patent: 6191964 (2001-02-01), Boylan et al.
patent: 7038922 (2006-05-01), Diallo et al.
patent: 7057906 (2006-06-01), Tamura
patent: 2002-10636 (2002-01-01), None
U.S. Appl. No. 11/302,234, filed Dec. 14, 2005, Tsuruya.
U.S. Appl. No. 11/302,184, filed Dec. 14, 2005, Tsuruya, et al.

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