基于负载转矩滑模观测器的永磁同步电机转速复合PI控制  

Compound Speed PI Control for Permanent Magnet Synchronous Motor Based on Load Torque Sliding Mode Observer

作　　者：付国伟 朱虎 FU Guowei;ZHU Hu(Yutong Bus Co.,Ltd.,Zhengzhou 450047,China)

机构地区：[1]宇通客车股份有限公司,郑州450047

出　　处：《微电机》2023年第11期60-65,共6页Micromotors

摘　　要：针对电动化工程机械用永磁同步电机(PMSM)频繁变转速、变负载扰动运行工况的需求,设计了一种复合PI控制器,以降低转速响应的超调。同时,为减小系统变负载扰动影响,提出一种负载转矩滑膜观测器,将其转矩观测值补偿到电流环的给定,实现对随动负载的快速响应,提升系统抗负载扰动性能。通过仿真与实验证明,设计的转速复合PI控制器能够可靠降低转速响应超调,提升系统抗负载扰动性能;提出的负载转矩观测器与前馈补偿控制算法,能够准确观测实时的负载扰动,补偿至电流环给定的负载扰动,有效减低了转速的波动,改善了动态性能。A composite PI controller is designed to reduce the overshoot of speed response in response to the frequent variable speed and load disturbance operating conditions of permanent magnet synchronous motors(PMSM)used in electric engineering machinery.At the same time,in order to reduce the influence of system variable load disturbance,a load torque sliding film observer was proposed,whose torque observation value was compensated to the given current loop to achieve rapid response to the servo load and improve the system’s anti load disturbance performance.Through simulation and experiments,it has been proven that the designed speed composite PI controller can reliably reduce speed response overshoot and improve the system’s anti load disturbance performance;The proposed load torque observer and feedforward compensation control algorithm can accurately observe the real-time load disturbance,compensate to the load disturbance given by the current loop,effectively reduce the speed fluctuation,and improve the dynamic performance.

关 键 词：永磁同步电机 负载转矩观测器 转速复合控制器 前馈补偿 

分 类 号：TM351[电气工程—电机] TM341[自动化与计算机技术—检测技术与自动化装置] TP273[自动化与计算机技术—控制科学与工程]