采用移相调制的多重斩波电路，可以提高等效开关频率，因此可应用在中大功率场合。
With the shift-phase modulated multiple chopper circuit, the equivalent switch frequency can be improved, so it can be used in large power occasion.
采用级联型多电平逆变器给异步电机供电，逆变器的开关信号利用载波移相脉宽调制方法生成。
The asynchronous machine is fed by cascaded multilevel inverter, and the inverter switching signals are generated by carrier phaseshifted pulse width modulation method.
基于移相载波调制，建立了变频器的非线性数学模型。
Based on the phase shift pulse width modulation technology, the mathematical non-linear model is developed.
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