Experiments show that the motor phase current controlled by this kind of SPWM inverter can be strictly sinusoidal and the running of the motor can remain steady for the ultra low speed range.

实验结果表明，这种SPWM逆变器控制的电机相电流严格正弦，能在超低速下平稳运行。

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In a drive system of power transistor inverter-motor, not only can it be used in fine control of motor current waveform, phase, amplitude and frequency, but can also be used to sense, fault current.

在大功率晶体管逆变器——电动机驱动系统中，它不但可用来对电动机电流的波形、相位、幅值和频率进行精细控制，而且能快速地检测出故障电流。

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It provides a method for the untouched switch Control for three - phase alternating current motor.

为大功率三相交流电机的无触点控制提供一种方法。

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