Circuit for moderating a peak reverse recovery current of a rect

Details Circuit for moderating a peak reverse recovery current of a rect Circuit for moderating a peak reverse recovery current of a rect

1997-02-24

1999-07-13

Berhane, Adolf Danske

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

363 59, G05F 1613

Patent

active

059231530

ABSTRACT:
In a power converter having a power train that includes a power switch and a rectifier for conducting forward currents from the power switch, a circuit for, and method of, moderating a peak reverse recovery current of the rectifier and a power converter employing the circuit or the method. The circuit includes: (1) a snubber circuit coupled to the rectifier and including a snubber inductor, a snubber capacitor and an auxiliary diode, the snubber inductor reducing the peak reverse recovery current of the rectifier and the snubber capacitor recovering energy stored in the snubber inductor and (2) an auxiliary switch, coupled in parallel with the power switch, that is activated when the power switch is transitioned from a conducting state to a non-conducting state to charge the snubber capacitor.

REFERENCES:
patent: 5307004 (1994-04-01), Carsten
patent: 5313382 (1994-05-01), Farrington
patent: 5414613 (1995-05-01), Chen
patent: 5461302 (1995-10-01), Garcia et al.
patent: 5477131 (1995-12-01), Gegner
patent: 5486752 (1996-01-01), Hua et al.
patent: 5633579 (1997-05-01), Kim
"A Comparison of Voltage Mode Soft Switching Methods for PWM Converters" by K. Mark Smith and Keyue M. Smedley; 1996 IEEE; pp. 291-298.
"High Efficiency Telecom Rectifier Using a Novel Soft-Switched Boost-Based Input Current Shaper" by Robert Streit and Daniel Tollik; 1991 IEEE; Nov. 1991; pp. 720-726.
"Novel Zero-Voltage-Transition PWM Converters" by Guichao Hua, Ching-Shan Leu, and Fred C. Lee; 1992 IEEE; pp. 55-61.
"Soft Transitions Power Factor Correction Circuit" by Ionel Dan Jitaru; May 1993; pp. 202-208.

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