应用双极性脉冲传输信号。避免了因远距离电缆充、放电带来的波形畸变。
Application of bipolar pulse in transmitting signal can avoid distorted wave caused by charge or discharge in a long cable.
文中给出了按照面积中心等效法合成SPWM波形的机理以及面积中心等效算法，并对双极性面积中心等效法生成的SPWM波形进行了谐波分析。
The paper puts forward the mechanism of combined waveform and computation of a SPWM area center equivalent. Harmonic of double pole SPWM waveform is analyzed in this paper.
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