Turn-off control circuit for a gate turn-off thyristor

Details Turn-off control circuit for a gate turn-off thyristor Turn-off control circuit for a gate turn-off thyristor

1987-10-08

1988-07-19

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

307633, 307641, H02M 108

Patent

active

047589426

ABSTRACT:
A turn-off control circuit for a gate turn-off thyristor is used in a state where one end of an inductive load is connected therewith on the cathode side. The turn-off control circuit includes a first turning-off transistor, which takes-out electric current through the gate at the first stage of the turn-off operation of the gate turn-off thyristor, and a second turning-off transistor, which takes-out electric current through the gate at the second stage of the turn-off operation of the gate turn-off thyristor so as to surely effect the turn-off operation.

REFERENCES:
patent: 4117351 (1978-09-01), Kalfus et al.
patent: 4231083 (1980-10-01), Matsuda et al.

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