Trigger circuit for solid state switch

Details Trigger circuit for solid state switch Trigger circuit for solid state switch

1983-05-26

1985-11-19

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307252J, 307297, H03K 1772

Patent

active

045544638

ABSTRACT:
The power dissipated, in a trigger circuit for gating on a semiconductor switch, is minimized by employing a constant current source to provide the gate trigger current. This assures adequate triggering regardless of supply voltage variations or switch intrinsic control voltage requirements. Power is saved by supplying only the current required to drive the semiconductor switch on, thereby preventing overdrive. With constant d-c gate current, the precise amount of power needed to turn on and close the switch is provided while wasting relatively little energy due to gate intrinsic voltage variations of the switch or to input line voltage variations.

REFERENCES:
patent: 3846644 (1974-11-01), Takagi et al.
patent: 3987314 (1976-10-01), Leowald et al.
General Electric SCR Manual 6th Edition, dated 1979, pp. 85 & 86.
Westinghouse Electric Corp. (Semiconductor Division), Application Data 54-540, dated Dec. 1976, pp. 1-4.

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