Permanent split-phase capacitor induction motor
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United States of America Patent
Stats
-
Jun 9, 1987
Grant Date -
N/A
app pub date -
Oct 8, 1985
filing date -
Oct 19, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A permanent split-phase capacitor induction motor having a capacitor (7) connected in series with an auxiliary winding (5) via an electronic switch (9) which is operated by a control circuit (11, 13) so as to obtain a higher starting torque than if the switch were permanently closed. The control circuit suitably comprises an integrating (21 to 31) responsive to the voltage appearing across the switch (9) and trigger circuit (19) which closes the switch when the output of the integrating circuit exceeds a threshold value, the integrating circuit resetting when the switch closes, and the switch reopening at the next current zero.
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