摘要
传统的空间电压矢量脉宽调制(SVPWM)应用于三电平逆变器时,在判断合成参考电压矢量所在扇区和开关矢量的作用时间的过程中,存在复杂的坐标旋转和三角函数运算,计算量大,精度低,对高精度实时控制产生了不可忽略的影响。本文根据空间电压矢量调制的规律,提出一种新型三电平SVPWM等效控制算法。该算法无需坐标变换、三角函数计算和无理数计算,使得计算过程非常简单,节约了计算的时间,使得结果更为精确。
While controlling the three-level inverter, the algorithm of traditional space vector PWM needs complex coordinate transformation and trigonometric function calculation when determining the location of desired vector and the duty time of active vectors. This leads many calculation operations and low calculation precision and which can＇t be ignored in some high precision and high speed control. Based on the algorithm of three-level SVPWM, a novel equivalent control algorithm of SVPWM is proposed. It hasn＇t any coordinate transformation, trigonometric function and irrational number calculations, which simplifies the calculation process and leads the calculation results more accurate.
出处
《大功率变流技术》
2009年第1期17-20,24,共5页
HIGH POWER CONVERTER TECHNOLOGY
