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초록

This article presents the end-effected hybrid layer model (EHLM) to correctly capture geometry-driven end-effects and current-driven nonlinear saturation in the double-sided linear permanent magnet synchronous motors (DS-LPMSMs). The proposed modeling method consists of the magnetic equivalent circuit (MEC) model for the armature mover to capture the nonlinear saturation and slotting effects and the end-effected layer model (ELM) to accurately account for the engaged magnetic fields between the armature mover ends and PM tracks. The leakage reluctance adaptation method is also proposed to accurately estimate the nonlinear leakage fluxes with the minimum number of reluctance networks. The DS-LPMSM testbed is constructed to experimentally validate the EHLM, using sixphased race-track windings to improve the manufacturability and to have the potential for force ripple reduction. The fidelity of the proposed EHLM is validated both by the equivalent finite-element method (FEM) and the experiments. The validation results show significant fidelity even in the heavy saturation caused by high-level phase current excitations, also achieving much faster computational speed at the same time, namely two orders of magnitude faster when compared to the FEM.