超螺旋滑模控制的PMSM直接转矩控制优化  

Optimization of PMSM Direct Torque Control System Based On Super-Twisting Sliding Mode Control

作　　者：张洪图 黄海波[1] 裴智杰 ZHANG Hong-tu;HUANG Hai-bo;PEI Zhi-jie(School of Electrical&Information Engineering,Hubei University of Automotive Technology,Shiyan Hubei 442002,China)

机构地区：[1]湖北汽车工业学院电气与信息工程学院,湖北十堰442002

出　　处：《计算机仿真》2024年第6期198-204,共7页Computer Simulation

基　　金：湖北省中央引导地方科技发展专项(2018ZYYD007)。

摘　　要：针对传统永磁同步电机直接转矩控制中磁链和转矩脉动较大以及转矩脉动引起的高频噪声的问题,提出了一种超螺旋滑模直接转矩控制策略。所提控制策略将传统超螺旋控制理论中不连续的切换函数替换为具有光滑连续特性的双曲正切函数,并设计了转速、转矩和磁链滑模控制器,同时引入SVPWM空间电压矢量脉宽调制技术获取连续的电压矢量,保证逆变器开关频率恒定,上述策略解决了系统切换发生抖振的问题,并提高了趋近速度。仿真结果表明,相比传统直接转矩控制和传统超螺旋滑模控制,在该控制策略下磁链和转矩的脉动现象得到有效抑制,系统的动态响应速度和鲁棒性得到有效提高。Aiming at the problems of large flux and torque ripple and high-frequency noise caused by torque rip⁃ple in traditional direct torque control of permanent magnet synchronous motor,a super twisting sliding mode direct torque control strategy is proposed in this paper.This control strategy replaces the discontinuous switching function in the traditional super twisting control theory with the hyperbolic tangent function with smooth continuous characteris⁃tics,and designs the sliding mode controller of speed,torque and flux.At the same time,SVPWM space voltage vector pulse width modulation technology is introduced to obtain the continuous voltage vector to ensure the constant switc⁃hing frequency of the inverter.This strategy solves the problem of chattering during system switching and improves the approaching speed.The simulation results show that compared with traditional direct torque control and traditional su⁃per spiral sliding mode control,the pulsation of flux and torque can be effectively suppressed,and the dynamic re⁃sponse speed and robustness of the system can be effectively improved under this control strategy.

关 键 词：永磁同步电机 超螺旋滑模控制 直接转矩控制 

分 类 号：TM341[电气工程—电机]