Inner Loop Design for PMLSM Drives With Thrust Ripple Compensation and High-Performance Current Control

To realize the precise thrust force control in permanent magnet linear synchronous motor (PMLSM) drives, this paper studies a novel design method of the high-performance current inner loop. First, to increase the control bandwidth, an optimized predictive current controller, which takes account of t...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2018-12, Vol.65 (12), p.9905-9915
Main Authors: Wang, Mingyi, Yang, Rui, Zhang, Chengming, Cao, Jiwei, Li, Liyi
Format: Article
Language:English
Subjects:
Aerostatics
Algorithms
Couplings
Current control
Force
Hysteresis
Observer
Observers
parameter variation
permanent magnet linear synchronous motor (PMLSM)
Permanent magnets
Predictive control
predictive current control (PCC)
Sliding mode control
Stability analysis
Switching frequency
Synchronous motors
Thrust
thrust ripple
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Summary:To realize the precise thrust force control in permanent magnet linear synchronous motor (PMLSM) drives, this paper studies a novel design method of the high-performance current inner loop. First, to increase the control bandwidth, an optimized predictive current controller, which takes account of the one-step delay issue, is presented on the basis of the discrete-time model of the PMLSM. Second, as disturbance factors, the thrust ripple and parameter variation can influence the input and output command of the current controller, respectively. Therefore, an improved sliding mode algorithm with the variable exponential reaching law is introduced to suppress these two disturbances simultaneously, and the stability analysis is given to prove the convergence of the algorithm through the Lyapunov stability theory. Finally, a precise experimental platform on account of the aerostatic guide is established, and experimental results are given to demonstrate the feasibility of the proposed control scheme.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2018.2814014