Snubber circuit for a rectifier, method of operation thereof and

Details Snubber circuit for a rectifier, method of operation thereof and Snubber circuit for a rectifier, method of operation thereof and

1998-08-28

1999-11-23

Han, Y. J.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

323222, 323225, H02H 7122

Patent

active

059911743

ABSTRACT:
In a power converter having an input coupled to a power switch and a rectifier for conducting currents from the input to an output of the power converter, a snubber circuit for, a method of, moderating reverse recovery currents associated with the rectifier and a power converter employing the circuit or the method. In one embodiment, the circuit includes a snubber inductor and snubber capacitor coupled to the rectifier. The circuit further includes a first auxiliary switch that conducts to divert a portion of the currents away from the rectifier through the snubber inductor and snubber capacitor. The circuit still further includes a second auxiliary switch, interposed between the power switch and the first auxiliary switch, that conducts to create a path to discharge the capacitor to the output of the power converter.

REFERENCES:
patent: 5461302 (1995-10-01), Garcia et al.
patent: 5793190 (1998-08-01), Sahlstrom et al.
patent: 5841268 (1998-11-01), Mednik
Guichao Hua, Ching-Shan Leu, and Fred C. Lee; "Novel Zero-Voltage-Transition PWM Converters"; 1992 IEEE; pp. 55-61.
Joel P. Gegner and C. Q. Lee; "Zero-Voltage-Transition Converters Using an Inductor Feedback Technique"; 1994 IEEE, pp. 862-868.
Robert Streit and Daniel Tollik; "High Efficiency Telecom Rectifier Using a Novel Soft-Switched Boost-Based Input Current Shaper"; Nov. 1991 IEEE; pp. 720-726.
Richard Garcia, Rui Liu and Victor Lee; "Optimal Design for Natural Convection-Cooled Rectifiers"; 1996 IEEE; pp. 813-822.

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