基于改进分数阶滑模控制的PMSM直接转矩控制  

PMSM Direct Torque Control Based on Improved Fractional Order Sliding Mode Control

作　　者：王敏[1] 陈芬[1] 李想[1] 潘永春[1] 

机构地区：[1]河海大学能源与电气学院,江苏南京211100

出　　处：《广东电力》2016年第4期50-54,61,共6页Guangdong Electric Power

摘　　要：基于滑模变结构的永磁同步电动机直接转矩控制技术,具有控制结构简单、响应速度快、鲁棒性强等优点,是一种高性能的变频调速控制方法。为此,提出一种基于分数阶滑模变结构的永磁同步电动机直接转矩控制技术,采用组合趋近率设计分数阶滑模控制器,即在控制前期采用幂指数趋近率,控制后期采用变速趋近率。仿真结果表明该控制方法能够有效减小磁链和转矩脉动,显著增加系统响应速度,抗扰动性能好,鲁棒性强。Direct torque control technology for permanent magnet synchronous motor（ PMSM） based on sliding mode variable structure is provided with merits of simple control structure,fast response speed,strong robustness,and so on,which means a kind of high-powered control method for frequency conversion. Therefore,this paper proposes a kind of PMSM direct torque control technology based on fractional order sliding mode variable structure which uses combination reaching law to design the fractional order sliding mode controller,that is to adopt power exponent reaching law in the preliminary of control while variable speed reaching law in the late stage. Simulation result indicates that this control method is able to effectively reduce flux linkage and torque impulse and obviously improve response speed of the system,and has good disturbance performance and strong robustness.

关 键 词：分数阶滑模控制器 永磁同步电动机 组合趋近率 空间矢量脉宽调制 

分 类 号：TM714[电气工程—电力系统及自动化]