一种削弱积分型滑模结构的永磁同步电机矢量控制系统

A Vector Control of Permanent Magnet Synchronous Motor with Integral Weakening Sliding Mode Control Structure

为了改善传统积分滑模控制(SMC)结构的永磁同步电机(PMSM)由于转换动作不连续而造成的稳态误差和超调,提升系统的稳定性,设计了一种新型的积分削弱型SMC结构。基于传统的积分型SMC结构,引入边界层概念,在层外对积分进行削弱,柔化电机的趋近运动,通过Lyapunov函数验证了此种方式的优越性。基于积分削弱型结构设计思路,在MATLAB/Simulink中分别搭建出新旧2种控制器的PMSM矢量控制模型进行对比验证。最后,通过仿真分析对比2种控制结果转速图和电磁转矩图,与传统的积分型滑模控制相比,所设计的新型SMC结构可以有效改善系统稳态误差和稳定性。

To improve the stability of permanent magnet synchronous motor(PMSM)with traditional integral sliding mode control(SMC)structure and improve the stability of the system,a new integral weakening SMC structure is designed.Based on the traditional integral SMC structure,the boundary layer concept is introduced to weaken the integral outside the layer and soften the approaching motion of the motor.The advantages of this method are verified by Lyapunov function.Based on the integral weakening structure,the PMSM vector control models of the traditional and novel controllers are respectively built in MATLAB/Simulink for comparison and verification.The simulation analysis results show that,compared with the traditional integral sliding mode control,the designed SMC structure can effectively improve the steady-state error and stability of the system.