The significant factors which exert an influence on instantaneous fluctuation of motor current are in sequence :Vari-speed wave form, vari-speed amplitude and vari-speed frequency.

在变速参数中影响电机瞬时电流波动最为显著的因素依次为变速波形、变速幅度和变速频率。

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Then, the effects of current sensor measurement error and non-sinusoidal magnetic field distribution on motor torque fluctuation are theoretically investigated.

然后从理论上研究了电流传感器测量误差和非正弦磁场分布对永磁同步电机转矩波动的影响。

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The theoretical analysis and experimental results demonstrate that the motor current has some fluctuation in vari-speed cutting process, but it is almost no effect on normal operation of machine tool.

理论分析和试验结果表明，采用变速切削加工时，电机瞬时电流确有一定程度的波动，但不影响机床电机的正常使用；

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