三电平空间矢量脉宽调制的简化算法

Simplified Algorithm for Three-level Space Vector Pulse Width Modulation

在传统三电平空间矢量脉宽调制算法中,计算各基本矢量的占空比常常涉及到三角函数或查表计算,计算比较复杂,从而耗费大量的控制器资源。鉴于此,提出了一种三电平空间矢量脉宽调制的简化算法,它以两电平空间矢量脉宽调制简化算法为基础,运用到原有的将三电平空间矢量图划分为6个小的正六边形的算法中,使原有的调制算法得到了简化。仿真结果验证了此简化算法的准确性和可行性。

There are always complicated sector identification and duty cycle calculations that would normally involve trigonometric function calculations or look-up tables in the conventional three-level SVPWM algorithm,thus taking up much controller resource. A simplified algorithm for three-level SVPWM is,therefore, proposed.Based on a simplified algorithm for two-level SVPWM,the conventional three-level SVPWM algorithm in which the space vector diagram is divided into six small hexagon is simplified.The simulation results with its accuracy and implement are then presented for verification.