Circuit for eliminating snubber current noise in the sense circu

Electric power conversion systems – Current conversion – Including automatic or integral protection means

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363 98, 363132, H02M 7537

Patent

active

049377256

ABSTRACT:
An H-bridge converter connected to a load includes a direct current power source, first and second pairs of switches alternately switched in order to connect the power source to the load, a plurality of snubber circuits correspondingly connected to the switches for protecting the switches from high currents and voltages, a sensing circuit connected between the first and second pairs of switches for sensing when each of the first and second pairs of switches are closed, and a snubber circuit counteracting circuit connected to a first snubber circuit of the first pair of switches, a second snubber circuit of the second pair of switches and to the sensing circuit for counteracting the flow of snubber currents in the sensing circuit from the first and second snubber circuits.

REFERENCES:
patent: 4466041 (1984-08-01), Witulski et al.
patent: 4542440 (1985-09-01), Chetty et al.
patent: 4555754 (1985-11-01), Hennevin
patent: 4566059 (1986-01-01), Gallios et al.
patent: 4607322 (1986-08-01), Henderson
patent: 4626980 (1986-12-01), McGuire
patent: 4688165 (1987-08-01), Pruitt
patent: 4691270 (1987-09-01), Pruitt

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