一种新颖的逆变器通用调制方法建模与实现

传统的SPWM和SVM实现方法割裂了二者的联系,使得调制方法缺乏灵活性。通过对SPWM和SVM的建模,提出了一种新型通用调制方法。仿真和实验表明,该方法将SVM和SPWM统一起来,可以更好地提高逆变效果而不必中断芯片运行,同时该方法计算量更小,精度更高,为进一步改善逆变波形质量,提高系统控制精度创造了条件。

Modeling and Realizing for a Novel Inverter General Modulation Method

Traditional methods for SVM and SPWM are different vastly and haven't noticed the essential relation between SVM and SPWM,which is not convenient for industry appliances.A model of pulses was constructed and a general modu-lation method was presented based on TI 2407 DSP,with three phase full bridge inverter as the target.The simulative and experimental results show that switching between SVM and SPWM without interrupting DSP is easy.In this method the computation are vastly decreased in comparison with the traditional method.The calculation accuracy is also increased correspondingly.More CPU resources are saved,which can optimize the inverter output and control more effective.This method can provide a good reference for the DSP appliance in power model and other control systems.So it is a practicable modulation method.