Power control apparatus
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United States of America Patent
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-
Sep 11, 1990
Grant Date -
N/A
app pub date -
Jan 19, 1989
filing date -
Jan 22, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pair of static induction thyristors, which are coupled in parallel in the opposite bias directions between an AC power source and a load, is turned on by a light signal and is turned off by natural commutation, a light signal or an electric signal. The turn-off light signal is generated within a phase angle of 90.degree. in the time axis around the zero-cross point of the AC voltage from the AC power source.
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