Efficient snubber for rectifier circuits

Details Efficient snubber for rectifier circuits Efficient snubber for rectifier circuits

1989-07-13

1990-12-11

Stephan, Steven L.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 48, 363 53, H02M 706

Patent

active

049774930

ABSTRACT:
A rectifier circuit having a rectifier (D4) allowing current to flow in a forward direction to an output (V.sub.OUT). A saturable inductor (L3) in series with the rectifier (D4) blocks reverse recovery rectifier current and directs it to an inductor (L4), the energy stored in that inductor re-setting the saturable inductor (L3) to allow subsequent flow of current in the forward direction to the rectifier (D4). A capacitor (C2) absorbs surplus energy from the inductor (L4) and a rectifier (D5) guides that surplus energy to the output (V.sub.OUT). This rectifier circuit is particularly useful as part of a convertor where an electronic switch repeatedly switches current through an inductor (L1) and the energy from the inductor (L1) is delivered to the output (V.sub.OUT) via the rectifier circuit.

REFERENCES:
patent: 3955131 (1976-05-01), Piccone et al.
patent: 4230955 (1980-10-01), Johannessen
patent: 4591966 (1986-05-01), Smith
Yamada, "A New Noise Suppressor with Amorphous Saturable Reactor", IEEE Proceeding, Apr. 1986, pp. 134-140.
Ninomiya, "Noise Suppression by Magnetic Snubbers in Switching Power Converters", IEEE Record, Apr. 1988, pp. 1133-1140.

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