当通常的均方根电流被打断，这样的一个电机可以产生一个可达几千伏的电涌过压。

Such a motor can produce a transient overvoltage, reaching many thousands of volts, when the normal rms current is interrupted.

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利用傅里叶级数对其进行了频谱分析，计算了次数小于19次的各次谐波电流均方根值的频谱数据。

Using Fourier series, the frequency spectrum analysis was analyzed, and spectrum data of harmony wave less than 19 were calculated.

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介绍了逆变器谐波电流均方根值最小的脉宽调制(PWM)。

This paper introduces the pulse wide modulation (PWM) based on minimum root-mean-square value of harmonic current of inverter.

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