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Efficient and Accurate Electromagnetic-Analysis Model for Asymmetric-End Permanent Magnet Linear Synchronous Motor
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DOI：10.1109/TEC.2025.3648999.png)
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Abstract
En 中文
This paper introduces an improved subdomain analytical model to efficiently predict the electromagnetic performance of complex primary-end Permanent Magnet Linear Synchronous Motors (PMLSMs) under various load conditions. Specifically, the study focuses on a novel slotted single-sided asymmetric-end permanent magnet linear synchronous motor (SSAE-PMLSM). Based on periodic boundary conditions, the motor model is segmented and reconstructed in the tooth region, achieving minimal subdomain division for the complex primary-end structure. The solution process fully leverages the Neumann boundary conditions, significantly reducing computational complexity and enabling rapid, accurate calculation of the SSAE-PMLSM magnetic field. By reversing the reconstructed model and applying the superposition principle, the actual on-load magnetic field distribution is obtained. Then the detent force, thrust force, and back-electromotive force (EMF) are calculated based on magnetic field calculations. Numerical results from finite element methods (FEM) validate the effectiveness of the analytical model. Finally, a prototype of the SSAE-PMLSM was manufactured, and experimental results confirm the accuracy of the developed analytical model in predicting both magnetic fields and forces.
Keywords:
Analytical models
electromagnetic analysis
force
magnetic fields
permanent magnet motors
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