针对SVPWM死区问题一种新的控制方法  

A Novel Control Method for the Problem of SVPWM Dead-Time

作　　者：万健如[1] 魏志强[1] 李莲[2] 张海波[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072 [2]天津理工大学自动化与能源工程学院,天津300191

出　　处：《电工技术学报》2006年第7期105-108,120,共5页Transactions of China Electrotechnical Society

基　　金：天津市自然科学基金资助项目(05YFJMJC11500)

摘　　要：针对空间矢量脉宽调制(Space-VectorPulseWidthModulability,SVPWM)死区问题对电机运行、调速性能的影响,通过180°导通型与120°导通型相结合方式,构建一种新型SVPWM控制方法。对原有6个有效开关矢量及2个零开关矢量共八种状态,按照平行四边形法则,合成一个新的电压空间矢量,利用12个有效电压空间矢量合成,输出等幅旋转电压空间矢量,从而有效避免死区效应影响,并确保避免管子“直通”短路现象,提高被控电机的调速性能。理论分析和实验验证了该方法的有效性。To the effect of tradition SVPWM dead problem on the performance of motor running and speed control, a new SVPWM control method is proposed in the paper. It synthesized the 6 original valid vectors with 2 zero switch vectors, used with 12 voltage space-vectors, and through 180° conduction and 120° conduction to compose constant-amplitude rotation voltage space-vector. As a result, the effect of dead and the short circuit of thyristors are avoided, and the speed control performance of motor is improved. The validity of the method is approved through analysis and experimentation.

关 键 词：死区问题 PWM调速 矢量合成 等幅旋转 数字信号处理器 

分 类 号：TM921[电气工程—电力电子与电力传动]