Thyristor firing circuit module with integral optical isolation,

Details Thyristor firing circuit module with integral optical isolation, Thyristor firing circuit module with integral optical isolation,

1977-10-25

1980-08-12

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

307252R, 307305, 307311, 361 91, 361111, H02H 320

Patent

active

042176182

ABSTRACT:
A thyristor firing module for use in high power circuits which provides protection against damage or misfiring. The module comprises optically isolated control circuitry optically coupled to firing circuitry which in turn is coupled to a darlington transistor pair to produce a high current drive pulse to fire the thyristor. The module also includes varistor control of voltage across the thyristor. Power for the firing circuitry is derived from the voltage across the thyristor in its non-conducting state.

REFERENCES:
patent: 3416002 (1968-12-01), Faust
patent: 3535532 (1970-10-01), Merryman
patent: 3648060 (1972-03-01), Hagen
patent: 3663838 (1972-05-01), Reimers
patent: 3723769 (1973-03-01), Collins
patent: 3812382 (1974-05-01), Pascente
patent: 3936706 (1976-02-01), Hamstra
patent: 3947726 (1976-03-01), Dececco et al.
patent: 4027228 (1977-05-01), Collins
patent: 4065669 (1977-12-01), Bogel

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