Circuit and method for triggering a thyristor

Details Circuit and method for triggering a thyristor Circuit and method for triggering a thyristor

1999-07-21

2000-06-06

Berhane, Adolf Deneke

Electricity: power supply or regulation systems

Output level responsive

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

323324, 323905, G05F 140, G05F 2402

Patent

active

060723041

ABSTRACT:
An improved trigger circuitry for a high side thyristor application having a thyristor connected to an A/C line, a capacitor connected across the A/C line to A/C neutral through impedance, an electronic switch connected from the thyristor to the junction of the capacitor and associate impedance. During the positive portion of the A/C cycle, the thyristor is triggered in quadrant III via the switch and the capacitor is charged. During the negative portion of the A/C cycle, the discharge of the capacitor triggers quadrant II of the thyristor via the switch.

REFERENCES:
patent: 3746951 (1973-07-01), Hohman
patent: 4307331 (1981-12-01), Gyugyi
patent: 4323793 (1982-04-01), Schutten et al.
patent: 4743834 (1988-05-01), Rice
patent: 4805082 (1989-02-01), Heinrich et al.
patent: 5204548 (1993-04-01), Dahler et al.

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