Circuit and method for triggering a thyristor
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United States of America Patent
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Jun 6, 2000
Grant Date -
N/A
app pub date -
Jul 21, 1999
filing date -
Jul 21, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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