Extended Two-State Observer-Based Speed Control for PMSM With Uncertainties of Control Input Gain and Lumped Disturbance

In this article, an extended two-state observer (ETSO) is proposed for the permanent magnet synchronous motor (PMSM) with the uncertainties of system parameters and load torque. First, the ETSO is designed to estimate the two extended states, namely control input gain and lumped disturbance. The con...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2024-06, Vol.71 (6), p.1-11
Main Authors: Xiong, Jiaxin, Fu, Xinghe
Format: Article
Language:English
Subjects:
Control systems
Controllers
Extended two-state observer (ETSO)
Load modeling
load torque
moment of inertia
Moments of inertia
Observers
permanent magnet synchronous motor (PMSM)
Permanent magnets
Speed control
State observers
stator flux linkage
Stators
Synchronous motors
Torque
Tracking
Uncertainty
Velocity control
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Summary:In this article, an extended two-state observer (ETSO) is proposed for the permanent magnet synchronous motor (PMSM) with the uncertainties of system parameters and load torque. First, the ETSO is designed to estimate the two extended states, namely control input gain and lumped disturbance. The control input gain includes moment of inertia and stator flux linkage. Then, a speed controller with online adjustment for the control input gain is designed by using the estimates obtained from the ETSO to improve the speed tracking performance of PMSM. The convergence of the ETSO and the speed controller is analyzed by Lyapunov theory. Finally, simulations and experiments are carried out to verify the effectiveness of the proposed control scheme. The results demonstrate that the control input gain and the lumped disturbance are effectively estimated, and the speed tracking performance of the PMSM with the uncertainties of moment of inertia, stator flux linkage, and load torque is significantly improved.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2023.3292850