Online from: 1982
Subject Area: Electrical & Electronic Engineering
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|Title:||Subdomain perturbation finite element method for skin and proximity effects in inductors|
|Author(s):||Patrick Dular, (Department of Electrical Engineering and Computer Science, University of Liege - FNRS, Liege, Belgium), Ruth V. Sabariego, (Department of Electrical Engineering and Computer Science, University of Liege - FNRS, Liege, Belgium), Laurent Krähenbühl, (Université de Lyon, Laboratoire Ampère, UMR CNRS 5005, Ecole Centrale De Lyon, Ecully, France)|
|Citation:||Patrick Dular, Ruth V. Sabariego, Laurent Krähenbühl, (2008) "Subdomain perturbation finite element method for skin and proximity effects in inductors", COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, Vol. 27 Iss: 1, pp.72 - 84|
|Keywords:||Boundary conditions, Eddy currents, Finite element analysis, Perturbation technique|
|Article type:||Research paper|
|DOI:||10.1108/03321640810836654 (Permanent URL)|
|Publisher:||Emerald Group Publishing Limited|
Purpose – To develop a subdomain perturbation technique to calculate skin and proximity effects in inductors within frequency and time domain finite element (FE) analyses.
Design/methodology/approach – A reference limit eddy current FE problem is first solved by considering perfect conductors via appropriate boundary conditions. Its solution gives the source for eddy current FE perturbation subproblems in each conductor with its actual conductivity. Each of these problems requires an appropriate mesh of the associated conductor and its surrounding region.
Findings – The skin and proximity effects in inductors can be accurately determined in a wide frequency range, allowing for a precise consideration of inductive phenomena as well as Joule losses calculations in thermal coupling.
Originality/value – The developed subdomain method allows to accurately determine the current density distributions and ensuing Joule losses in conductors of any shape, not only in the frequency domain but also in the time domain. It extends the domain of validity and applicability of impedance boundary condition techniques. It also allows the solution process to be lightened, as well as efficient parameterized analyses on signal forms and conductor characteristics.
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