Transient finite-element analysis using a surface admittance boundary condition to incorporate eddy-current effects

We present a time-domain finite-element formulation for modeling electromagnetic fields in two-dimensional regions containing conductors, dielectrics, and magnetic materials. Such an analysis is needed to determine terminal parameters (equivalent to resistance and inductance per unit length) for mul...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 41; no. 7; pp. 2236 - 2242
Main Authors Wassef, K.N., Peterson, A.F.
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.07.2005
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Admittance
Admittance boundary condition
Boundary conditions
Convolution integrals
Cross-disciplinary physics: materials science; rheology
eddy currents
Electrical impedance
Electromagnetic modeling
Electromagnetic transients
Exact sciences and technology
Excitation
Finite element method
Finite element methods
finite-element analysis
Magnetic analysis
Magnetism
Materials science
Mathematical analysis
Mathematical models
Other topics in materials science
Physics
Power system transients
skin effect
Surface resistance
Time domain analysis
Transient analysis
Finite element method
finite-element analysis
Admittance boundary condition
Boundary conditions
Modelling
skin effect
Surface analysis
Eddy currents
Surface states
Transients
Magnetic properties
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Summary:We present a time-domain finite-element formulation for modeling electromagnetic fields in two-dimensional regions containing conductors, dielectrics, and magnetic materials. Such an analysis is needed to determine terminal parameters (equivalent to resistance and inductance per unit length) for multiconductor transmission lines excited with time-varying signals. We use a novel separation of the excitation and response within the formulation and a surface admittance boundary condition to provide a time-domain solution capable of incorporating both proximity-effect and skin-effect eddy currents over a wide range of material parameters. We use a Prony expansion to convert the inherent convolution integral into a recursive expression, resulting in an efficient numerical procedure that can incorporate nonlinear material effects.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2005.851889