三电平逆变器SVPWM参考矢量区域快速判断研究∗

摘要

A method for determining the regional reference voltage vector based on 60° coordinate system was proposed, and made a comparison between Cartesian and 60° coordinate systems. This algorithm could eliminate large numbers of trigonometric functions comparing to the traditional SVPWM reference vector in the course of reference vector sector determination. Just need simple addition, subtraction and comparison, it could easily get the three nearest vectors around the reference vector and reduce the on-time calculation. the results of simulation verified the correctness and fast of the proposed algorithm.%提出了一种基于60°坐标系的参考电压矢量区域判断方法。该算法可省去传统SVPWM算法中参考矢量区域判定过程中的大量三角函数运算，只需简单的加减和比较即可迅速得到该参考矢量所在区域的最近的3个空间矢量，缩短了在线计算时间，并采用首发矢量为正小矢量的八段对称式SVPWM方案的单极性模式进行仿真。结果验证了该算法的正确性。