一种基于SPWM的新型SVPWM调制方法

A New SVPWM Generation Method Based on SPWM

矢量脉宽调制（SVPWM）是当今应用较为广泛的交流调制技术，它以减少电力电子器件的开关次数，提高直流电压的利用率，并且能够较好的抑制谐波。本文通过对SPWM调制生成方法与SVPWM的生成方法相比较，通过分析发现了在每个扇区内，两者之间存在一个固定的差值，由于SPWM的生成方法比较简单，而SVPWM的生成比较复杂。因此，利用两者之间的关系，可以在SPWM的基础上比较方便的生成SVPWM。通过上述分析，本文提出了两种实现SVPWM的算法，使得程序得到简化，而且达到了相同的效果。

Vector Pulse Width Modulation （SVPWM） is more and more widely used in AC modulation technology because it can improve the utilization of DC voltage and decrease the switching times and harmonic. However, it is complex to get the SVPWM pulse directly compared with SPWM （Sinusoid Pulse Width Modulation）. This paper proposes a new method to obtain the SVPWM based on the method of SPWM. Because there is constant error between the two methods in each sector between SVPWM and SPWM, we can obtain SVPWM by adding the error to SPWM conveniently. Two algorithms are proposed to produce SVPWM with the new method and the program is simplified.