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

Author

Gyselinck, J. ; Dular, P. ; Geuzaine, C. ; Sabariego, R.V.

Author_Institution

Bio-, Electro- & Mech. Syst. (BEAMS) Dept., Univ. Libre de Bruxelles, Brussels

Volume

45

Issue

3

fYear

2009

fDate

3/1/2009 12:00:00 AM

Firstpage

1280

Lastpage

1283

Abstract

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.

Keywords

boundary-elements methods; computational electromagnetics; eddy currents; finite element analysis; surface impedance; 1D eddy current; 3D magnetic vector potential; brute force finite element model; computational magnetodynamics; surface impedance boundary condition; time domain finite element calculation; trigonometric basis function; Finite-element methods; magnetodynamics; surface-impedance boundary conditions; time-domain analysis;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2012594

Filename

4787368