基于DSP控制的60°坐标系下三电平逆变器SVPWM的研究

SVPWM Algorithm Using 60° Coordinate Frame for Three-level Inverter Based on DSP Controler

针对传统的SVPWM算法计算复杂的缺点,提出了基于60°坐标系的三电平逆变器的SVPWM算法,该算法仅需进行简单的逻辑判断就可以得到参考矢量的具体位置,并且用简单的加减运算就可以得到基本矢量作用时间,能够极大简化SVPWM的运算。DSP的实验结果表明了这种基于60°坐标系的三电平逆变器SVPWM算法的正确性。

Aim at the complex computation of the classical SVPWM,a fast space-vector pulse width modulation algorithm using 60°coordinate frame applied to three-level inverter was introduced.This SVPWM algorithm needs not to compute trigonometric function,so the computer is extremely simple.The position of reference vector and the time of every vector are easily confirmed base on 60°coordinate frame, Experiment results based on DSP show that the space-vector pulse width modulation algorithm is correct.