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 idea of SVPWM is to take the ideal stator flux circle of three-phase symmetrical motor stator as the reference standard when the three-phase symmetrical sine wave voltage is supplied. The three-phase inverter with different switching modes is properly switched to form the PWM wave. The actual flux vector to track its exact circle of flux. The traditional SPWM method from the power point of view to generate a sine wave power frequency regulator, and SVPWM method inverter system and asynchronous motor as a whole to consider, the model is relatively simple, but also facilitate the real-time microprocessor control)