Double ended isolated D.C.--D.C. converter

Details Double ended isolated D.C.--D.C. converter Double ended isolated D.C.--D.C. converter

1997-10-31

1999-05-25

Riley, Shawn

Electric power conversion systems

Current conversion

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

363126, 363127, 363 89, H02M 3336

Patent

active

059074817

ABSTRACT:
A D.C.--D.C. down converter utilizes a controlled converter primary switching circuit and a full-wave rectified secondary circuit employing synchronous rectification. An isolation transformer having split first and second secondary windings supplies current to the full-wave secondary circuit. The gating signals for synchronous rectification are produced by a switch conduction control including a secondary switch control receiving control signals from the primary switch control through a control current isolating transformer. The secondary switch control is powered by the secondary converter circuit. Through the use of a split secondary winding of the isolation transformer and a full-wave rectifying circuit, the secondary converter circuit of the D.C.--D.C. converter may readily generate drive voltages for supply to the secondary switch control, allowing the secondary converter circuit and load to be fully isolated from the primary converter circuit and input source.

REFERENCES:
patent: 4441146 (1984-04-01), Vinciarelli
patent: 4519024 (1985-05-01), Federico et al.
patent: 4646217 (1987-02-01), Baroni et al.
patent: 4903189 (1990-02-01), Ngo et al.
patent: 5436825 (1995-07-01), Wawra et al.
patent: 5729444 (1998-03-01), Perol
"The Performance Of The Current Doubler Rectifier With Synchronous Rectification," Laszlo Balogh, HFPC, May 1995 Proceedings, pp. 216-221.

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