基于DSP的优化空间矢量脉宽调制研究

Research on Optimal Space Vector PWM Based on DSP

提出了一种新颖的便于DSP数字实现的五段法SVM算法,对各扇区开关信号及其形成原理进行了详细讨论,给出了其余算法流程的简洁结论和此算法的双重傅里叶分析。在不同载波比N和调制度M下,用MATLAB软件对五段法SVPWM调制波信号、直流电压利用率及输出电压谐波等进行了仿真分析研究,得到了影响SVPWM总体性能的几个主要因素。在TMS320F2812 DSP上实现了此算法,验证了理论分析及仿真结果。

A novel five-segment space vector modulation （SVM） algorithm was presented. It could be realized by DSP easily. The gate signals and their forming principle were discussed in details. The concise algorithm conclution of the rest flow and the dual fourier analysis were given. The modulation signals, DC bus voltage utilization and output line voltage harmonics were analyzed with the simulation of MATLAB at different modulation factors （M） and cartier frequency modulation index （N）. The primary factors which will affect the total performance of the SVPWM algorithm were obtained. Moreover, the algorithm was implemented by the DSP of TMS320F2812. The results validate the theory and simulation.