Active-clamp current-source push-pull DC-DC converter

Details Active-clamp current-source push-pull DC-DC converter Active-clamp current-source push-pull DC-DC converter

2006-08-24

2009-08-11

Nguyen, Matthew V (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S056060

Reexamination Certificate

active

07573731

ABSTRACT:
Provided is a current-source push-pull DC-DC converter using an active clamp circuit for reusing energy of leakage inductances by not only diodes on a secondary side of a transformer being zero-current switched using a series-resonant full-wave rectifier, but also the active clamp circuit on a primary side of the transformer, which provides a discharge path of the energy stored in the leakage inductances, increases power conversion efficiency even for a wide input voltage range and reduces a switch voltage stress as compared to a conventional current-source push-pull circuit by operating even for a duty ratio below 0.5 by flowing a current of an input inductor through capacitors of the active clamp circuit when both main switches are off.

REFERENCES:
patent: 4158881 (1979-06-01), Simmons et al.
patent: 6191960 (2001-02-01), Fraidlin et al.
patent: 6272027 (2001-08-01), Fraidlin et al.
patent: 7193868 (2007-03-01), Yasumura
patent: 7196914 (2007-03-01), Ren et al.

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