Air Gap Field Analysis of Single Sided Linear Induction Motor With Time-Harmonic Finite Element Method

M.S. Manna[1], S Marwaha[1], and N. Kaur[2]
[1]Dept. of EIE, Sant Longowal Inst. of Engg. & Tech Longowal, Sangrur, Punjab, India
[2]Dept. of ECE, Universal Group on Institutes, Lalaru, Punjab, India
Published in 2010

In recent years, the single-sided linear induction motor (SLIM) has been the most suitable choice for electric vehicles of the wheel and touchless type. The reason is simplicity in manufacturing, capability in applying direct force, moving and braking and low pollution. To study the influence of air gap between the stator and mover of linear induction motor the prototype model of SLIM used as benchmark, which could incorporate the natural asymmetry for the SLIM. There are two common approaches for simulating electrical machines; the transient approach and the time-harmonic approach. In this paper, the time-harmonic FE approach is generalized to situations with arbitrary set of relevant air gap field harmonics. In this technique, a new idea is introduced to account for the longitudinal end-effect factor. Meanwhile, other electromagnetic effects, such as transverse edge effects and skin effect are taken into account. The simulation results have been achieved by using COMSOL Multiphysics software with AC/DC Module for 2D/3D analysis of flux distribution analysis.

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