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Comptes Rendus Physique
Volume 10, n° 1
pages 91-99 (janvier 2009)
Doi : 10.1016/j.crhy.2009.02.002
Characterization of radiated electromagnetic fields using equivalent sources – Application to the EMC of power printed circuit boards
Caractérisation des champs de rayonnements électromagnétiques en utilisant des sources équivalentes – application au CEM des cartes de circuit imprimé
 

Lotfi Beghou a, b, , Lionel Pichon a, François Costa b, c
a Laboratoire de génie électrique de Paris (LGEP), UMR 8507 CNRS, SUPELEC, Université Paris Sud, UPMC–Université Paris 06, plateau de Moulon, 91192 Gif sur Yvette cedex, France 
b Laboratoire SATIE, UMR 8029, UniverSud, École normale supérieure, 94230 Cachan, France 
c IUFM Créteil, Université Paris 12, France 

Corresponding author.
Abstract

This article presents an original methodology to characterize electromagnetic disturbances radiated from power electronic devices. The method is based on the substitution of the power device by an equivalent set of elemental dipoles (electric and magnetic dipoles). The set of dipoles radiates the same near-field. The dipoles are determined from a near field cartography of the fields obtained with a measurement bench. The dipoles parameters are determined by solving an inverse problem using a genetic algorithm. The efficiency of the approach is demonstrated on an academic DC-DC converter. Finally some results about the chopper are presented. The methodology has two advantages: first it allows one to define some threshold limitations for electromagnetic fields on the surroundings and secondly it gives the location of the real source distribution. To cite this article: L. Beghou et al., C. R. Physique 10 (2009).

The full text of this article is available in PDF format.
Résumé

Cet article présente une méthode de modélisation des rayonnements en champ proche des alimentations à découpage. Cette méthode constitue à remplacer par un ensemble de dipôles élémentaires (dipôles électriques et dipôles magnétiques) le dispositif sous test. Cet ensemble de dipôles rayonne le même champ électromagnétique que le dispositif réel. Un algorithme génétique est utilisé pour la résolution du problème inverse qui permet de trouver les paramètres du model. Dans ce but, des mesures de champ électromagnétique proche sont effectuées. La méthode a été appliquée au cas d’un hacheur académique. Enfin quelques résultats sur le hacheur sont présentés. Pour citer cet article : L. Beghou et al., C. R. Physique 10 (2009).

The full text of this article is available in PDF format.

Keywords : Electromagnetic radiation, Printed circuit board

Mots-clés : Rayonnement électromagnétique, Carte de circuit imprimé




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