Thyristor control circuit

Details Thyristor control circuit Thyristor control circuit

1979-03-06

1981-01-13

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307252B, 307252W, 323326, 361197, H03K 1772, H03K 1722, H03K 17292

Patent

active

042451663

ABSTRACT:
A field effect transistor is used to short circuit the timing capacitor of a thyristor when power is interrupted or removed. The short circuiting of the timing capacitor prevents the residual capacitor charge from being added to a new charge after an interruption so that the early firing of the thyristor is avoided and component damage is prevented. Because capacitor charging always starts at zero voltage when the field effect transistor is used, hysteresis at low voltages is greatly improved.

REFERENCES:
patent: 3183372 (1965-05-01), Chin
patent: 3316477 (1967-04-01), Shrider et al.

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