Controllable rectifier circuit

Details Controllable rectifier circuit Controllable rectifier circuit

1980-01-18

1982-08-24

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307252N, 307305, 324158SC, 363138, H03K 1772

Patent

active

043463096

ABSTRACT:
When the forward load current through a thyristor is commutated it does not immediately recover its availability to block forward current flow due to re-applied forward voltage, the time taken for this blocking ability to return is known as the thyristor turn-off time. Hitherto a low valued current has been passed through the thyristor immediately after commutation in the reverse direction to achieve reduction of the turn-off time. The present invention operates to achieve a greater reduction of the turn-off time by passing a low-valued current through the thyristor in a forward direction immediately after commutation. Several alternative circuit arrangements and operating configurations for supplying the forward recovery current are described.

REFERENCES:
patent: 3638042 (1972-01-01), Studtmann

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