摘要
传统三电平SVPWM算法复杂,根本原因是采用直角坐标系,判断参考矢量所落入的扇区等,需要大量的三角函数计算。针对于多电平SVPWM,在此指出了坐标系选取不当是造成计算复杂的根本原因。采用KL坐标系,空间矢量的合成仅含有乘法和加法运算,运算量的大小与电平数无关。仿真验证说明了算法可行且简单有效,避免了大量三角函数的运算。可以应用到三电平及多电平SVPWM算法中。
The traditional tri-level SVPWM algorithm is complex because it adopts the orthogonal coordinates. As a result, numbers of trigonometric function calculations are needed to judge the sectors where the reference vector drops in. A new tri-tevel SVPWM algorithm based on KL coordinates is introduced which is simple and easy to carry out, because there is only multiplication and addition operation in it. Moreover, the quantity of operation is independent of the level number. Simu- lation result proves that the algorithm is feasible and valid, and can avoid trigonometric function operation in comparison to the traditional SVPWM algorithm. It can be applied in tri-level and multi-level SVPEM algorithms.
出处
《现代电子技术》
2010年第20期174-177,共4页
Modern Electronics Technique
