Accelerated commutation for passive clamp isolated boost...

Details Accelerated commutation for passive clamp isolated boost... Accelerated commutation for passive clamp isolated boost...

2005-04-05

2005-04-05

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S056050, C363S056020

Reexamination Certificate

active

06876556

ABSTRACT:
An efficient and cost effective bidirectional DC/DC converter reduces switch voltage stress via accelerated commutation allowing use of a low-cost passive clamp circuit in boost mode. The converter includes a primary circuit, transformer and secondary circuit. The primary circuit takes the form of a “full bridge converter,” a “push-pull converter,” or an “L-type converter.”. The primary circuit may include a dissipator such as a snubber circuit or small buck converter. A secondary side of the transformer is momentarily shorted by the secondary circuit by, for example, turning on at least two switches in the secondary circuit simultaneously for a minimal calibratable period when a pair of primary circuit controllers turn off to protect the primary circuit switches from voltage spikes during switching conditions.

REFERENCES:
patent: 3818313 (1974-06-01), Rosenstein et al.
patent: 3986097 (1976-10-01), Woods
patent: 4953068 (1990-08-01), Henze
patent: 5745351 (1998-04-01), Taurand
patent: 5991670 (1999-11-01), Mufford et al.
patent: 6191957 (2001-02-01), Peterson
patent: 6452815 (2002-09-01), Zhu et al.

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