三电平逆变器改进型SVPWM研究与实现

李真贵; 胡杨昊; 佘海湘; 姚景昌; 罗晓雪

三电平逆变器改进型SVPWM研究与实现

引用本文：李真贵，胡杨昊,佘海湘,姚景昌,罗晓雪.三电平逆变器改进型SVPWM研究与实现[J].计算技术与自动化,2014,(4):49-54

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作者	单位
李真贵，胡杨昊,佘海湘,姚景昌,罗晓雪	(1. 湘潭大学信息工程学院，湖南湘潭411105；2.湖南铁道职业技术学院电气院，湖南株洲412001 3. 湖南工程学院应用技术学院，湖南湘潭411101)

中文摘要: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。

中文关键词:二极管钳位型三电平逆变器；SVPWM 调制策略；MATLAB仿真 DSP

Research and Realization of a Modified SVPWM for Three Level Inverter

Abstract:A modified SVPWM Control Strategy for three Level Inverter is proposed to deal with large amount of calculation 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 realize the modified SVPWM computation. The experiment waveforms and simulation results verify the feasibility and effectiveness 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.

keywords:Neutral-Point-Clamped (NPC) three-level inverter SVPWM computation MATLAB simulation DSP

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