Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1989-06-19
1990-06-26
Wong, Peter S.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
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
Dhyanchand John J.
Palaniappan Rasappa
Sundstrand Corporation
Wong Peter S.
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