基于DSP28335的七相逆变器空间解耦SVPWM方法研究  

Research on vector space decomposition SVPWM for 7-phase inverter with DSP28335

作　　者：郭冀岭[1] 肖建[1] 邱忠才[1] 王远波[1] 罗鹏[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《电工电能新技术》2014年第5期5-11,21,共8页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金(51177137);中央高校专项资金(SWJTU11BR040)资助项目

摘　　要：七相变频调速系统因缺相运行更具有代表性故近年来受到关注,本文以DSP芯片TMS320F28335为处理器,提出了三类七相电压型逆变器SVPWM调制方法,其中I类算法相当于三相SVPWM算法在七相系统的简单扩展,计算量小,但其相电流谐波含量大;II类和III类SVPWM分别采用空间解耦的思想,通过调整电压矢量的作用时间和顺序,尽量减小三次和五次谐波子空间合成矢量,从而分别达到消除3次谐波以及同时消除3次和5次谐波的目的。本文对三类调制方法的原理、DSP实现过程、消除谐波效果分别进行了仿真分析和实验验证,同时本文提出的基于DSP28335的SVPWM调制方法可以方便地扩展到m(奇数)相系统。The seven-phase adjustable speed drive system has drawn more attention because of its typical open - phase fault operation in recent years. Based on the DSP TMS320F28335 and the SVPWM of three-phase voltage source inverter, three kinds of SVPWM of 7-phase voltage source inverter are proposed in this paper. The control strategy, realization process and harmonic elimination analysis is verified by simulation and experiment results respectively. The current has a plenty of harmonic content in SVPWM I; with the space decompsition, the compsitive vector in 3rd and 5th harmonic subspace has been reduced remarkably, and the 3rd harmonic content and 5th harmonic content has been eliminated in SVPWM II and SVPWM III. And these SVPWM methods based on DSP28335 could be easily used in other m（odd number）-phase system.

关 键 词：七相 空间解耦 空间矢量脉宽调制 消除谐波 

分 类 号：TM343[电气工程—电机]