基于变速趋近律的PMSM复合速度控制  

Composite speed control for PMSM based on varying speed reaching law

作　　者：朱小兵 王仲根[1] 高晓嵩 ZHU Xiaobing;WANG Zhonggen;GAO Xiaosong(School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan 232001,CHN)

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《制造技术与机床》2024年第6期95-101,共7页Manufacturing Technology & Machine Tool

基　　金：安徽省自然科学基金项目(2108085MF200);安徽高校自然科学重点项目(KJ2020A307)。

摘　　要：为了提高永磁同步电机速度控制器的性能,文章提出一种新型变速趋近律滑模控制策略。变速趋近律在传统指数趋近律的基础上引入关于系统状态的幂次项和关于滑模函数的变速项,并采用双曲正切函数来减小高频切换项的影响。该控制策略有利于减小电流和转矩脉动,提高了系统运行的稳定性和响应速度。另外,针对系统受未知干扰影响的问题,设计了一种滑模扰动观测器来估计系统的总扰动,并将估计的扰动补偿到复合速度控制器中。最后,利用Matlab/Simulation仿真和电机实验平台对所提出的控制策略进行验证。仿真和实验结果表明,复合速度控制器与扰动观测器相结合的控制策略具有更快的收敛速度、更小的抖振和更好的抗扰性能。To improve the performance of speed controllers for permanent magnet synchronous motors,a new varying speed reaching law sliding mode control strategy is proposed.The varying speed reaching law introduces a power term on the system state and a variable speed term on the sliding mode function based on the traditional exponential reaching law,and uses a hyperbolic tangent function to reduce the effect of the high-frequency switching term.This control strategy helps to reduce current and torque pulsations and improves the stability and responsiveness of the system operation.In addition,to address the problem that the system is affected by unknown disturbances,a sliding mode disturbance observer is designed to estimate the total disturbance of the system,and the estimated disturbance is compensated into the composite speed controller.Finally,the proposed control strategy is verified by using Matlab/Simulation simulation and motor experimental platform.The simulation and experimental results show that the control strategy combining the composite speed controller with the disturbance observer has faster convergence speed,less chattering,and better anti-disturbance performance.

关 键 词：永磁同步电机 滑模控制 变速趋近律 扰动观测器 

分 类 号：TM341[电气工程—电机]