3D Finite Element Analysis of Eccentricity in a Tubular Linear Permanent Magnet Machine

In this paper, the translator eccentricity of a tubular linear permanent magnet (TLPM) machine is studied using a 3D finite element analyses. Translator eccentricity in linear machines, as rotor eccentricity in rotating machines, is inevitable. It should then be evaluated and studied during the design stage to avoid performance degradation and life time reduction. Apart from few publications, translator eccentricity in tubular linear machines has been rarely addressed in scientific literature. The aim of this study is to contribute to filling this gap. The effect of static eccentricity of the translator is studied for a surface mounted TLPM motor. While the novelty may seem limited, this study should be regarded as a step toward the development of modeling approaches allowing a good “accuracy/computation time” ratios.