非正交坐标系下NPC三电平逆变器控制方法

摘要

对于二极管钳位式三电平逆变器,采用传统的空间矢量脉宽调制方法在大扇区判断、小三角形判断和矢量作用时间等方面需进行大量的三角函数运算,这大大增加了控制器的计算量.研究了一种非正弦坐标系的空间脉宽调制方法,对传统的空间矢量脉宽调制进行简化.仿真结果和实验结果证明了该非正弦坐标系下的NPC三电平逆变器控制方法的有效性.%By the traditional space vector pulse modulation method,it needs calculate a lot of trigonometric functions in judging the big section and the small triangle and the action time of the vector in the three-level in-terter. And it will result in the increase of the caculating quantity of micro-processor. To solve the problems,an algorithm for SVPWM based on non-orthogonal coordinate frame was studied. Simulation results and experiment results show the effectivity of the algorithm.