简化三电平SVPWM的DSP实现方法

Simplified Algorithm of Three-Level SVPWM with DSP

本文针对三电平SVPWM的DSP实现方法进行了研究。为了能够简化三电平SVPWM的扇区判断以及矢量作用时间的计算,节省DSP资源,提高快速性和准确性,本文将三电平逆变器的矢量空间划分为六个小六边形的矢量空间,在每个小六边形中利用两电平的扇区判断方法和时间计算方法进行计算。由于这6个小六边形的作用规律是一致的,因此大大简化了扇区判断和时间计算。

This paper researches the three-level SVPWM algorithm with DSP. In order to simplify the section judgment and the time calculation of space vector, save the resource of DSP and improve the per-formance, this paper presents a method that divides the space vector into 6 small hexagon space vectors. In each small hexagon, the same algorithm of two-level SVPWM is used to judge the triangle section and calculate the time of vector. This method simplifies the three-level SVPWM and improves the performance.