MOTOR STARTERS USING PULSE SEQUENCES WITH SUBFUNDAMENTAL MODULATION
摘要:
A motor starter includes a first switch configured to couple and decouple an AC power source to a motor, a second switch configured to bypass the first switch, and a control circuit configured to operate the first switch to modulate an AC voltage applied to the motor from the AC power source at a frequency that is less than a fundamental frequency of the AC voltage and to operate the second switch to bypass the first switch responsive to operation of the motor meeting a predetermined criterion.
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