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Surface-Impedance Boundary Conditions in Time-Domain Finite-Element Calculations Using the Magnetic-Vector-Potential Formulation

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4 Author(s)
J. Gyselinck ; Bio-, Electro- & Mech. Syst. (BEAMS) Dept., Univ. Libre de Bruxelles, Brussels ; P. Dular ; C. Geuzaine ; R. V. Sabariego

The authors propose a novel time-domain extension of the well-known frequency-domain surface-impedance method in computational magnetodynamics. Herein, the 1-D eddy-current problem in a massive conducting region (semi-infinite slab) is considered via a number of exponentially decreasing trigonometric basis functions that cover the relevant skin-depth (or frequency) range of the application at hand. The method is elaborated for the 3-D magnetic-vector-potential formulation and is applied to a simple 2-D test case. Results are shown to converge well to those obtained with an accurate brute-force finite-element (FE) model.

Published in:

IEEE Transactions on Magnetics  (Volume:45 ,  Issue: 3 )