SVPWM的主要思想是以三相对称正弦波电压供电时三相对称电动机定子理想磁链圆为参考标准，以三相逆变器不同开关模式作适当的切换，从而形成PWM波，以所形成的实际磁链矢量来追踪其准确磁链圆。传统的SPWM方法从电源的角度出发，以生成一个可调频调压的正弦波电源，而SVPWM方法将逆变系统和异步电机看作一个整体来考虑，模型比较简单，也便于微处理器的实时控制。-The main ideas of SVPWM is when the power is balanced three-phase sine wave voltage three-phase symmetrical motor stator flux circle as the reference standard, ideal for different mode for the appropriate switch three-phase inverter, thus forming PWM wave, with the formation of the actual flux linkage vector to track its accurate flux circle. Traditional SPWM method　the viewpoint of power supply, to generate a frequency modulation of sine wave power supply voltage regulator, and the SVPWM method will inverter system and asynchronous motor as a whole to consider, the model is simple, also facilitate the real-time control of the microprocessor.