The simulation results show that the speed ratio of the motor mostly affects the total harmonic distortion of the current and the displacement power factor.

仿真结果表明，电机转速比是影响交交变频轧机系统网侧基波功率因数与电流总畸变率的关键原因。

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Motor loss takes a large proportion in total power of pump when variable frequency pump is used.

水泵变频时电动机损耗占水泵总功耗的比例较大。

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