Zero current switching reverse recovery circuit

Details Zero current switching reverse recovery circuit Zero current switching reverse recovery circuit

1992-12-23

1994-04-26

Sterrett, Jeffrey L.

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

323282, 323351, 361 18, 361 84, G05F 1613

Patent

active

053070054

ABSTRACT:
Disclosed is a circuit for preventing damage to a controllable switching circuit as a result of a reverse recovery current originating from a rectifier circuit coupled to the controllable switching element during recovery of the rectifier circuit. The damage prevention circuit includes a reactive impedance circuit coupled in parallel with the rectifier circuit for controlling a reverse recovery current from the rectifier circuit during recovery of the rectifier circuit. A second controllable switching element is employed to direct the reverse recovery current to the reactive impedance circuit in response to recovery of the rectifier. The second controllable switch also directs the reverse recovery current from the reactive impedance circuit to a load, wherein the reverse recovery current may be safely diminished.

REFERENCES:
patent: 4688158 (1987-08-01), Peterson et al.
patent: 4695413 (1987-09-01), Ekelund et al.
patent: 4761725 (1988-08-01), Henze
patent: 4853837 (1989-08-01), Gulczynski
patent: 5066900 (1991-11-01), Basset
patent: 5146399 (1992-09-01), Gucyski
patent: 5164656 (1992-11-01), Gucyski
patent: 5227941 (1993-07-01), Rubin
Ias Digest, Dec. 1992 V. Vlatkovic D. Borojevic, and F. C. Lee "A Zero-Voltage Switched, Three-Phase Boost PWM Rectifier With Power Factor Correction".

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