Speed control for permanent magnet synchronous motor based on an improved extended state observer

• Published in: Advances in mechanical engineering Vol. 10; no. 1
• Main Author: Liu, Bingyou
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.01.2018; Sage Publications Ltd; SAGE Publishing
• Subjects: Authorship; Computer simulation; Continuity (mathematics); Control systems; Controllers; Design; Disturbances; Dynamical systems; Flutter; Mathematical models; Noise; Nonlinear dynamics; Predictive control; Simulation; Speed control; State observers; Velocity; permanent magnet synchronous motor; control; Improved extended state observer; speed; nonlinear function
• ISSN: 1687-8132; 1687-8140
• DOI: 10.1177/1687814017747663

An improved extended state observer is designed to eliminate the influences of speed control for a permanent magnet synchronous motor. The improved extended state observer is designed based on a new nonlinear function. This function exhibits better continuity and derivability than previously available functions and can effectively reduce the high-frequency flutter phenomenon. The nonlinear dynamics, model uncertainty, and external disturbances of the permanent magnet synchronous motor speed control system are extended to a new state. The improved extended state observer is utilized to observe this state. The overtime variation of the permanent magnet synchronous motor speed control system can be predicted and compensated in real time by the improved extended state observer. Therefore, the improved extended state observer, which is designed based on the new nonlinear function, can eliminate the disturbances on the permanent magnet synchronous motor speed control system. Finally, simulation experiments are performed and results show that the permanent magnet synchronous motor speed control system with improved extended state observer exhibits better performances.