Fractional-order electromagnetic modeling and identification for PMSM servo system

作     者：Gan, He Cao, Zhiyan Chen, Pengchong Luo, Ying Luo, Xin 

作者机构：Huazhong Univ Sci & Technol Sch Mech Sci & Engn Wuhan 430074 Hubei Peoples R China South China Univ Technol Sch Automat Sci & Technol Key Lab Autonomous Syst & Networked Control Minist Educ Guangzhou 510641 Peoples R China Zhengzhou Univ Sch Elect Engn Zhengzhou 450001 Peoples R China 

出 版 物：《ISA TRANSACTIONS》 (美国仪表、系统和自动控制协会会刊)

年 卷 期：2024年第147卷

页      面：527-539页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0811[工学-控制科学与工程] 081102[工学-检测技术与自动化装置] 

基　　金：National Natural Science Founda-tion of China 

主　　题：Fractional-order modeling Permanent magnet synchronous motor Inverter nonlinearity Servo system Time delay 

摘      要：An accurate electromagnetic model is essential for an optimal controller tuning of the high-performance servo system. This paper proposes a fractional-order electromagnetic model of a permanent magnet synchronous motor (PMSM) servo system and an identification methodology of this model. The reason why the investigated electromagnetic model should be a fractional-order one is addressed with a detailed explanation. The influence of voltage source inverter nonlinearity, which may cause system identification error, is analyzed. An improved inverter nonlinearity model and compensation method are proposed to promote the accuracy of the model parameter identification. Compared with the existing typical electromagnetic models of the PMSM servo system, the current open -loop and closed-loop experiments prove that the proposed fractional-order electromagnetic model with time delay is more accurate for the actual physical system. The effectiveness of the proposed nonlinearity modeling and compensation scheme of the inverter is also verified on an experimental PMSM servo system.