Energy recovery snubber

Details Energy recovery snubber Energy recovery snubber

1984-09-17

1986-08-19

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

361 91, 363 24, 363134, H02H 7122, H02M 3337

Patent

active

046073221

ABSTRACT:
A snubber circuit for protecting power switches which modulate the flow of power through an inductive element in a power converter, such as a main primary winding of a transformer, includes a snubbing capacitor and a first switch which is operable to connect the snubbing capacitor to a power switch. A second switch is operable to connect the snubbing capacitor to an auxiliary primary winding of the transformer. The first and second switches are operated so that immediately prior to turn-off of the power switch, the capacitor is connected thereto to store the turn-off reactive power caused by turn-off of the power switch. The first switch is then opened and the second switch closed to couple the reactive power to the auxiliary primary winding to improve the efficiency of the converter.

REFERENCES:
patent: 3437908 (1969-04-01), Vincent
patent: 4063306 (1977-12-01), Perkins et al.
patent: 4336587 (1982-06-01), Boettcher et al.
patent: 4378586 (1983-03-01), Bete
patent: 4438486 (1984-03-01), Ferraro

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