Self-regulating lossless snubber circuit

Details Self-regulating lossless snubber circuit Self-regulating lossless snubber circuit

1998-11-05

1999-11-16

Han, Y. J.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 17, 363126, H02M 706

Patent

active

059869046

ABSTRACT:
A lossless snubber circuit is described for use with power converters, particularly asymmetric half-bridge converters. The snubber circuit provides a clamping circuit which has a clamping diode and a clamping capacitor connected across each of the rectifier diodes in the power converters output circuit. The clamping diode and clamping capacitor act to clamp the voltage across the rectifier diode and to recover the reverse recovery energy from the rectifier diode's turn-off. The reverse recovery energy is then transferred back to the input capacitors of the converter's input circuit through an energy recovery circuit. The energy recovery circuit includes a recovery switch which regulates the operation of the snubber circuit and a commutation transformer which provides the path from the snubber circuit to the input circuit. The snubber circuit allows the clamping voltage of the clamping capacitor to be adjusted to accommodate changes in the converter's conditions.

REFERENCES:
patent: 4853836 (1989-08-01), Furuhashi
patent: 5351179 (1994-09-01), Tsai et al.
patent: 5379206 (1995-01-01), Davidson

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