Quasi-constant gate drive circuit

Details Quasi-constant gate drive circuit Quasi-constant gate drive circuit

1989-02-13

1990-10-23

Budd, Mark O.

Electricity: power supply or regulation systems

Input level responsive

Phase controlled switching using electronic tube or a three...

323320, 323905, 315194, 315DIG4, G05F 502

Patent

active

049655094

ABSTRACT:
A two-wire apparatus for controlling AC power to a load, by turning a thyristor on and off during each half cycle, includes a circuit that prevents the thyristor from being turned off prematurely. The circuit stores energy while the thyristor is off (i.e., non-conductive). After the thyristor turns on, the stored energy flows to the gate of the thyristor to keep it on until the end of the half cycle. The circuit permits reduced electromagnetic interference and increased load power rating; without requiring a third (neutral) wire for the apparatus.

REFERENCES:
patent: 3500455 (1970-03-01), Ross et al.
patent: 3935505 (1976-01-01), Spiteri
patent: 4160192 (1979-07-01), McAllise
patent: 4449054 (1984-05-01), Jop
patent: 4876498 (1989-10-01), Luchaco et al.
General Electric Silicon Controlled Rectifier Manual, third ed., p. 69, Lutron Electronics Co., Inc.-Ampion Brochure-P/N 360-219, Jun. 1988.

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