三电平逆变器改进型SVPWM研究与实现

针对传统三电平逆变器SVPWM控制策略所存在计算量大,编程实现难度大等问题,本文提出一种改进型的SVPWM算法,该算法的主要思想是将n电平数的逆变器降阶成n-1电平数的逆变器控制方式,实现对其控制,大大简化了计算量。在MATLAB平台上搭建了三相二极管钳位型三电平逆变器改进型SVPWM仿真模型,进行相关仿真实验;采用TMS320F2812作控制器实现了降阶SVPWM调制,实物实验波形和仿真实验结果,都验证了控制策略的可行性和有效性。

Research and Realization of a Modified SVPWM for Three Level Inverter

A modified SVPWM Control Strategy for three Level Inverter is proposed to deal with large amount of calcu- lation of The traditional SVPWM. The main idea of the algorithm is changing n level into （n--1） level for simplifying the calculation. A model of three level converter is established under MATLAB to discuss the modified SVPWM control method of （NPC） three-level converter in this paper. Finally, the paper uses TI＇s DSP TMS320F2812 as the core control unit to real- ize the modified SVPWM computation. The experiment waveforms and simulation results verify the feasibility and effective- ness of control strategy. The program of the in-phase disposition modulation PWM control method is very simple making full use of the resources of TMS320F2812 and the inventer is stable and reliable.