Lock-out logic circuit for inverter protection

Details Lock-out logic circuit for inverter protection Lock-out logic circuit for inverter protection

1978-08-04

1979-10-02

Shoop, William M.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363135, H02M 118

Patent

active

041700376

ABSTRACT:
A lock-out control logic circuit for a feedback inverter system, which senses the load current in each load switching element of the inverter system and utilizes the sensed current through the presently conducting load switching element to inhibit the next firing of the presently non-conducting load switching element. Current transformers are inserted in series with each switching element and coupled to a CMOS logic circuit which inhibits the firing pulse to a non-conducting load switching element in the event a current conduction condition is sensed.

REFERENCES:
patent: 3047789 (1962-07-01), Lowry
patent: 3448367 (1969-06-01), Corey
patent: 3657631 (1972-04-01), Martens et al.
patent: 3718853 (1973-02-01), Graf
patent: 3852656 (1974-12-01), Bourbeau
patent: 4126819 (1978-11-01), Stobbe et al.

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