Energy-saving calculation for using a large motor to drive a small load
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The company’s original equipment consisted of 132KW motors controlled by frequency converters; at 35HZ, the voltage was 130V and the current was 160A. These were later replaced with 75KW motors, with a voltage of 240V and a current of 70A. By how much is the no-load loss of the motor reduced, and what is the overall energy savings?
Copper loss and magnetic loss increase as the size of the motor increases; logically, low-power motors shouldn’t see such a large decrease in these losses