Protection of GTO converters by emitter switching

Details Protection of GTO converters by emitter switching Protection of GTO converters by emitter switching

1986-09-15

1988-05-17

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 18, 361 55, 361 91, 361104, 363 57, H02H 308

Patent

active

047455136

ABSTRACT:
A fault current protection arrangement for a power converter circuit utilizes gate turn-off thyristors as electronic switching devices. A gate turn-off thyristor is connected between relatively positive and negative voltage buses with a circuit interruption device connected in electrical series arrangement with a cathode terminal of the thyristor. A gate driver circuit is connected for providing control signals to the gate terminal of the thyristor for controlling its on and off states during normal operation. Upon detection of the fault current condition, the gate driver circuit is inhibited and the interruption device open-circuits the cathode terminal of the thyristor to divert current in the thyristor into the gate terminal. The resulting anode-to-gate current results in rapid turn-off of the thyristor.

REFERENCES:
patent: 4280161 (1981-07-01), Kuhn et al.
patent: 4322771 (1982-03-01), Struger
patent: 4390826 (1983-06-01), Erdman et al.
patent: 4593204 (1986-06-01), McMurray
patent: 4611267 (1986-09-01), McMurray
patent: 4631621 (1986-12-01), Howell

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