Robustness Improved Method for Deadbeat Predictive Current Control of PMLSM with Segmented Stators

Permanent magnet linear synchronous motors (PMLSMs) with stator segmented structures are widely used in the design of high-power propulsion systems. However, due to the inherent delay and segmented structure of the systems, there are parameter disturbances in the inductance and flux linkage of the m...

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Vydáno v:Actuators Ročník 13; číslo 8; s. 300
Hlavní autoři: Gu, Shijie, Leng, Peng, Chen, Qiang, Jin, Yuxin, Li, Jie, Yu, Peichang
Médium: Journal Article
Jazyk:angličtina
Vydáno: Basel MDPI AG 01.08.2024
Témata:
Algorithms
Analysis
Compensation
Control algorithms
Control systems
Design
DPCC
electromagnetic propulsion
incremental model
Inductance
Magnets, Permanent
Methods
Numerical analysis
Parameter estimation
Parameter identification
Parameter robustness
Performance prediction
Permanent magnets
PMLSM
Prediction models
Predictive control
Propulsion systems
Robust control
Simulation methods
Stability analysis
Stators
Synchronous motors
Transfer functions
ISSN:2076-0825, 2076-0825
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Shrnutí:Permanent magnet linear synchronous motors (PMLSMs) with stator segmented structures are widely used in the design of high-power propulsion systems. However, due to the inherent delay and segmented structure of the systems, there are parameter disturbances in the inductance and flux linkage of the motors. This makes the deadbeat predictive current control (DPCC) algorithm for a current loop less robust in the control system, leading to a decrease in control performance. Compensation methods such as compensation by observer and online estimation of parameters, are problematic to apply in practice due to the difficulty of parameter adjustment and the high complexity of the algorithm. In this paper, a robustness-improved incremental DPCC (RII-DPCC) method—which uses incremental DPCC (I-DPCC) to eliminate flux linkage parameters—is proposed. The stability of the current loop was evaluated through zero-pole analysis of the discrete transfer function. Current feedforward was introduced to improve the stability of I-DPCC. The inductance stability range of I-DPCC was increased from 0.8–1.25 times to 0–2 times the actual value, and the theoretical stability range was increased more than 4 times, effectively improving the robustness of the predictive model to flux linkage and inductance parameters. Finally, the effectiveness of the proposed method was verified through numerical simulation and experiment.
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ISSN:2076-0825
2076-0825
DOI:10.3390/act13080300