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Modèle numérique de conduction surfacique dans les dispositifs bidimensionnels - Prise en compte de non-linéarités

Abstract : Some electrical engineering devices present a lightly conducting layer with a dim thickness, which modifies considerably the electric potential and field distribution. This situation occurred, for example, when studying polluted insulators or feedthrough ones that include semi conducting coatings. The conducting zone has a very dim thickness with regard to the other sides of the system and it is difficult to take it into account, as it is, in a numeric resolution. This work deals with the modeling of a conducting layer (2D and 3D axisymmetric) present at the interface of two dielectrics. This one is simulated by a surface supplied with surface conductivity, which can depend or not on the electric field. The model's equations were embedded in a field computation software based on the boundary element method. The first chapter describes the various physical phenomena related to the presence of a conducting layer between two insulators. The second chapter remembers firstly, the classic results on the Maxwell equations. Then, it establishes an equation of the electricity conservation in the conducting zone. The third chapter goes through the different numeric methods generally used in electrical engineering. The fourth chapter deals with the numeric resolution. The fifth chapter presents the results and the validation of the software. The obtained results, in a simplified geometry, agree with the analytic solution (linear problem) and the numeric solution (non linear problem).
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Submitted on : Thursday, April 5, 2007 - 5:27:44 PM
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  • HAL Id : tel-00140119, version 1

Citation

Zié Yeo. Modèle numérique de conduction surfacique dans les dispositifs bidimensionnels - Prise en compte de non-linéarités. Autre. Ecole Centrale de Lyon, 1997. Français. ⟨tel-00140119⟩

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