Model Predictive Current Control of Permanent Magnet Synchronous Motor Based on Sliding Mode Observer with Enhanced Current and Speed Tracking Ability Under Disturbance

For model predictive current control (MPCC) strategy, its poor dynamic response caused by speed loop PI control and poor parameter robustness are the main factors restricting its development. So this paper proposes a model predictive current control based on sliding mode observer with better trackin...

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Bibliographic Details
Published in:IEEE transactions on energy conversion 2023-06, Vol.38 (2), p.1-11
Main Authors: Xu, Yanping, Yan, Zhongqiao, Zhang, Yanping, Song, Ruochen
Format: Article
Language:English
Subjects:
Controllers
Current control
Disturbance observers
Disturbance Suppression
Dynamic response
Load modeling
Load Torque
Mathematical models
Model Predictive Current Control
Observer
Parameter robustness
Permanent magnet motors
Permanent Magnet Synchronous Motor
Permanent magnets
Prediction models
Predictive control
Predictive models
Robust control
Sliding mode control
Stators
Synchronous motors
Torque
Tracking
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Summary:For model predictive current control (MPCC) strategy, its poor dynamic response caused by speed loop PI control and poor parameter robustness are the main factors restricting its development. So this paper proposes a model predictive current control based on sliding mode observer with better tracking ability of current and speed under disturbance. First, this paper analyzes the effect of motor parameter mismatches on current predicted values from multiple perspectives. And a sliding mode disturbance observer is designed to compensate lumped disturbances including parameter mismatches and unmodeled dynamic disturbances into prediction model. Then, the speed loop PI controller in model predictive current control is replaced by a deadbeat predictive controller to improve response speed of the speed loop. Meanwhile, the sliding mode load torque observer is constructed to observe the load torque and sends it into the deadbeat predictive controller to improve the anti-load disturbance performance of the control system. Furthermore, a sliding mode reaching law based on sinusoidal saturation function is proposed to suppress chattering of sliding mode observer. The experiments demonstrate that the proposed control strategy not only has faster dynamic response but also has good speed and current tracking performance under lumped disturbance and load disturbance.
ISSN:0885-8969
1558-0059
DOI:10.1109/TEC.2022.3214612