Semianalytical Modeling for Linear Motors With Conductive Media in High-Dynamic Applications

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Conductive surfaces in linear motors, performing high-dynamic motion, generate significant losses and parasitic forces due to eddy currents. While finite-element-analysis (FEA) models can estimate these effects accurately, their long computing time makes them unfavorable for the parametric analysis of the motor. Therefore, a computationally faster and accurate tool using semianalytical techniques is developed for these linear motors. This tool is applied to a superconducting linear motor where eddy-current losses within the cryostat are critical to the performance. The modeling tool is applied to two benchmark models of such a motor. Using benchmark 1, the developed tool is validated with FEA. The tool shows a major improvement in computation time when compared to FEA, with a relative error in instantaneous loss and force below 3%. For these reasons, the developed tool is suitable for the parametric analysis of the motor. In another study, a superconducting motor with essential conductive structures - cryostat wall, radiation shield, and cooling platform - is considered for parametric analysis. Results show that eddy-current losses increase when using a higher number of turns for the superconducting coils on account of a larger volume of the conductor and higher armature reaction.

Originele taal-2Engels
Aantal pagina's6
TijdschriftIEEE Transactions on Magnetics
Nummer van het tijdschrift11
StatusGepubliceerd - 1 nov. 2023


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