Title :
Surface-Impedance Boundary Conditions in Dual Time-Domain Finite-Element Formulations
Author :
Sabariego, Ruth V. ; Dular, Patrick ; Geuzaine, Christophe ; Gyselinck, Johan
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci. (ACE), Univ. of Liege, Liege, Belgium
Abstract :
This paper deals with time-domain surface-impedance boundary conditions in computational magnetodynamics considering two dual finite-element formulations and a nonlinear magnetic constitutive law. Based on the resolution of the 1-D eddy-current problem in a semi-infinite slab, the massive conducting region is accounted for by choosing a number of exponentially decreasing trigonometric basis functions covering the relevant frequency range of the application in hand. Herein the method is elaborated for the magnetic-vector-potential formulation and the magnetic-field formulation. Results for both formulations are compared and validated on 2-D linear and nonlinear test cases.
Keywords :
boundary-elements methods; computational electromagnetics; eddy currents; finite element analysis; surface impedance; time-domain analysis; 1-D eddy-current problem; computational magnetodynamics; dual time-domain finite-element formulation; magnetic-field formulation; magnetic-vector-potential formulation; massive conducting region; nonlinear magnetic constitutive law; semiinfinite slab; surface-impedance boundary conditions; trigonometric basis functions; Boundary conditions; Equations; Finite element methods; Frequency domain analysis; Magnetic domains; Magnetic fields; Magnetic flux; Saturation magnetization; Slabs; Time domain analysis; Finite-element methods; magnetodynamics; surface-impedance boundary conditions (SIBCs); time-domain analysis;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2010.2043234
