基于Anti-reset Windup方法改进的PMSM调速系统的滑模控制  

The improved sliding mode control of PMSM speed control system based on Anti-reset Windup method

作　　者：张富程 李慧斌 ZHANG Fu-cheng;LI Hui-bin(A VIC Xi＇an Flight Automatic Control Research Institute,Xi＇an 710065,China)

机构地区：[1]航空工业西安飞行自动控制研究所,陕西西安710065

出　　处：《电子设计工程》2018年第19期142-146,共5页Electronic Design Engineering

摘　　要：永磁同步电机(PMSM)调速系统在实际应用时,需在转速控制器的输出加入限制环节将电机的电流限制在一定范围内,防止电机和驱动电路的过流损坏。而对采用指数趋近律的滑模控制器(SMC)的转速环,由于初始阶段系统以较大速率趋近滑模面,导致电流环输入受限,系统达到饱和状态。而控制器中的积分器仍处于累加状态,迫使系统持续饱和,产生饱和(Windup)现象,导致系统的动态特性变差。因此,本文基于Anti-reset Windup方法对指数趋近律的滑模控制器进行改进,并给出了设计方法。通过仿真分析发现,改进后的控制器消除了windup现象,改善了电机在启动阶段的动态特性。同时,改进后的控制器使系统的鲁棒性和抗干扰性能更佳。In the practical application of permanent magnet synchronous machine （PMSM） speed control system, the current limiting element is added to the output of speed controller to protect motor and the drive circuit from damage caused by over-current. However, for the speed loop based on sliding mode controller with exponential approach rate, the system will converge to sliding mode surface at a large rate at the beginning, which can limit the input of current loop leads the system to saturation. Moreover, the integrator in controller keeps accumulating, which can compel the system to keep saturation continuously, namely the phenomenon of Windup. Because Windup has a bad effect on the dynamic performance of the control system, so in this paper, a novel sliding mode controller with exponential approach rate is proposed based on Anti-reset Windup method. According to simulation analysis, Windup in control system is eliminated by the proposed controller, and the dynamic performance is improved. Moreover, the speed control system with improved controller is more robust and possesses stronger anti-interference capability.

关 键 词：永磁同步电机 抗饱和 滑模变结构控制 鲁棒性 

分 类 号：TN99[电子电信—信号与信息处理]