Digital design is the main character of this system. The three-phase SPWM pulses are generated through sine wave compared with triangular wave.

数字化设计是本系统的特点，系统最终生成的三相spwm脉冲是基于三相正弦调制波和三角载波比较得到的。

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Even if it worked with three-phase sine, three-phase line current would have non-sine aberrance and produce harmonic wave-electricity.

即使在三相正弦激励的作用下，三相线电流也将发生非正弦畸变，产生谐波电流。

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