摘要
对SVPWM常规算法和快速算法进行了综合分析,并给出了其数字化实现方法;针对不同的零矢量分配因子和不同的调制比,对三相SVPWM逆变器的调制信号及其输出电压谐波特性进行了比较分析.仿真和实验结果证明了SVPWM实现方法的正确、有效性.与SVPWM常规算法相比,快速算法直接利用三相参考电压瞬时值计算开关状态切换时间、不需进行复杂的坐标变换、三角函数运算、扇区判断和有效矢量作用时间计算,不仅更易于各种SVPWM方法的数字化实现而且在同样条件下其运算速度更快.
The SVPWM conventional and fast algorithms for the three-phase inverter are analyzed comprehensively. Meanwhile, the SVPWM implementation method based on the microprocessor is presented. At last, the influence of modulation index and zero-vector distribution variable on the modulation signal and output voltage harmonic characteristics of the three-phase inverter is investigated. The simulation and experimental results show that the SVPWM implementation method is feasible and valid. In particular the SVPWM fast algorithm has faster executing speed and can be more easily implemented with a microprocessor in comparison to the conventional algorithm because it calculates the actual gating times for each inverter leg directly by use of three-phase reference voltages and needn＇t complex coordinate transformations, trigonometric function calculations, sector number identification, and the recombination of actual gating times.
出处
《湘潭大学自然科学学报》
CAS
CSCD
北大核心
2009年第3期154-159,共6页
Natural Science Journal of Xiangtan University
基金
湖北省教育厅重点科研资助项目(D200515002)
