It can obtain the improve of power factor of the input motor power, and can lighten its capacity.
可实现电机输入电源功率因数的改善，减轻其容量。
This method changes the input power of the motor.
此种方法改变电动机的输入功率。
The results show that available power and power input of water pump continuously decline with motor frequency reducing, and pump efficiency also decrease at the same time.
结果水泵有效功率和输入功率均随着电机频率的下降而不断降低，同时水泵效率也随着频率下降而降低。
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