Soft switched zero voltage transition full bridge converter

Details Soft switched zero voltage transition full bridge converter Soft switched zero voltage transition full bridge converter

2006-11-14

2006-11-14

Patel, Rajnikant B. (Department: 2838)

Electric power conversion systems

Current conversion

Using semiconductor-type converter

C363S017000

Reexamination Certificate

active

07136294

ABSTRACT:
A soft switched zero voltage transition full bridge converter for reducing power loss at very light loads for zero voltage switching (ZVS) converters operating at high frequency. The converter has four switches in two switching legs, each having two switches connected in series between two input voltage terminals. Junction points of the legs are coupled to a primary winding of a transformer. The transformer has a secondary winding from which an output voltage of the converter is derived by rectifying and filtering. A pair of capacitive voltage dividers are connected between the input terminals, each formed by two small capacitors, each having a parallel-connected diode. The output voltage is regulated by phase shift control of the switches. The capacitors are selected small enough for storing only enough energy to enable ZVS in conjunction with two resonant inductors. The converter enables reduced component size of the inductors and energy storage capacitors.

REFERENCES:
patent: 4648017 (1987-03-01), Nerone
patent: 5132889 (1992-07-01), Hitchcock et al.
patent: 5189601 (1993-02-01), Sellers
patent: 6016258 (2000-01-01), Jain et al.
patent: 6246599 (2001-06-01), Jang et al.

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