基于SVPWM的直接转矩控制新方案  

Novel DTC System Based on Space Vector Pulse Width Modulation

作　　者：曹承志[1] 时洪图[1] 尹明军[1] 张洪兵[1] 伞宏力[1] 

机构地区：[1]沈阳工业大学信息科学与工程学院,辽宁沈阳110023

出　　处：《系统仿真学报》2008年第21期5924-5928,共5页Journal of System Simulation

基　　金：辽宁省自然科学基金资助项目(20032032);教育部"春晖计划"合作科研项目(Z2005-2-11008);辽宁省教育厅高校科研项目(20206331)

摘　　要：针对传统的直接转矩控制(DTC)转矩脉动大、开关频率不恒定等问题,提出了一种基于空间电压矢量脉宽调制(SVPWM)技术的直接转矩控制系统新方案。该系统采用经遗传算法优化后的模糊控制器代替常规的磁链和转矩控制器,以获得任意相位的空间电压矢量,然后利用SVPWM技术来合成该矢量。仿真结果表明该方案能有效减小磁链和转矩脉动,改善系统的性能。To solve the problem of large torque ripple and inconstant inverter switching frequency in the conventional direct torque control （DTC）, a classic DTC method based on space vector pulse width modulation （SVPWM） was proposed. In the system a fuzzy controller optimized by Genetic Algorithm optimization was used to substitute for flux and torque controller of traditional DTC system so as to calculate the reference voltage space vector. Finally, the reference vector was then synthesized by a SVPWM algorithm. Simulation results show that the DTC system can effectively reduce the flux linkage and torque ripple and improve the performance of system.

关 键 词：直接转矩控制 空间电压矢量脉宽调制 模糊控制 遗传算法 仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]