Circuit for shutting down an inverter

Details Circuit for shutting down an inverter Circuit for shutting down an inverter

1977-02-22

1978-08-15

Shoop, William M.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 96, 363 79, H02M 118

Patent

active

041077717

ABSTRACT:
A circuit for shutting down an inverter that includes at least a series combination of first and second gate controlled rectifiers and a load. The circuit is comprised of means for sensing the direction and magnitude of the instantaneous current flowing through the load, and means responsive to the direction and magnitude of the sensed current for generating an output signal when the magnitude of the current exceeds a predetermined threshold level and the current is flowing in a first direction. The circuit further comprises means responsive to the simultaneous receiving of a shutdown signal and the generated output signal for further generating a gating pulse to be applied to the second gate controlled rectifier to cause the current flowing through the load to quickly extinguish. Further included is means responsive to the shutdown signal for inhibiting further regular gating of the gate controlled rectifiers to ensure quick turn off of the inverter.

REFERENCES:
patent: 3247447 (1966-04-01), Flairty
patent: 3852656 (1974-12-01), Bourbeau
patent: 3882370 (1975-05-01), McMurray
patent: 4041365 (1977-08-01), Peak et al.

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