Circuit and method for reducing inrush current of a three phase motor
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United States of America Patent
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Jun 27, 2017
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app pub date -
Oct 25, 2016
filing date -
Apr 16, 2015
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Abstract
A method and circuit for starting a three-phase motor in a manner that reduces inrush current normally associated with starting an AC motor. The method uses the circuit to start the three phase motor gradually with three phase alternating current having relatively low frequency and gradually increasing the frequency up to or above the motor operating frequency over a period of time and then switching in a steady state or static three phase alternating power supply to power the three phase motor.
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