Magnetic Shielding for Coreless Linear Permanent Magnet Motors

Abstract:

This paper concerns the local reduction of the magnetic flux density by means of magnetic shielding. Using a spatial frequency description, a 2-D semi-analytical periodic model is obtained for a coreless single-sided linear permanent magnet motor. The magnetic shield is included in the modeling using mode-matching. The obtained magnetic flux density is compared to a finite element model and is verified with measurements. The results show a reasonable agreement between the semi-analytical model and the measurements. Some large deviations occur due to the modeling assumption that the shield has a linear permeability, while the used shields are saturated. However, the semi-analytical modeling method is accurate enough for design purposes and initial calculations, especially when being aware of the possible saturation of the shield.

• Periodical: Applied Mechanics and Materials (Volumes 416-417)
• Pages: 45-52
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.416-417.45
• Online since: September 2013
• Authors: K.J.W. Pluk, J.W. Jansen, E.A. Lomonova
• Keywords: Electromagnetic Modeling, Finite Element Method (FEM), Linear Motor, Mode-Matching

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