[Caractérisation des champs de rayonnements électromagnétiques en utilisant des sources équivalentes – application au CEM des cartes de circuit imprimé]
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.
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.
Mot clés : Rayonnement électromagnétique, Carte de circuit imprimé
@article{CRPHYS_2009__10_1_91_0,
author = {Lotfi Beghou and Lionel Pichon and Fran\c{c}ois Costa},
title = {Characterization of radiated electromagnetic fields using equivalent sources {\textendash} {Application} to the {EMC} of power printed circuit boards},
journal = {Comptes Rendus. Physique},
pages = {91--99},
publisher = {Elsevier},
volume = {10},
number = {1},
year = {2009},
doi = {10.1016/j.crhy.2009.02.002},
language = {en},
}
TY - JOUR AU - Lotfi Beghou AU - Lionel Pichon AU - François Costa TI - Characterization of radiated electromagnetic fields using equivalent sources – Application to the EMC of power printed circuit boards JO - Comptes Rendus. Physique PY - 2009 SP - 91 EP - 99 VL - 10 IS - 1 PB - Elsevier DO - 10.1016/j.crhy.2009.02.002 LA - en ID - CRPHYS_2009__10_1_91_0 ER -
%0 Journal Article %A Lotfi Beghou %A Lionel Pichon %A François Costa %T Characterization of radiated electromagnetic fields using equivalent sources – Application to the EMC of power printed circuit boards %J Comptes Rendus. Physique %D 2009 %P 91-99 %V 10 %N 1 %I Elsevier %R 10.1016/j.crhy.2009.02.002 %G en %F CRPHYS_2009__10_1_91_0
Lotfi Beghou; Lionel Pichon; François Costa. Characterization of radiated electromagnetic fields using equivalent sources – Application to the EMC of power printed circuit boards. Comptes Rendus. Physique, Volume 10 (2009) no. 1, pp. 91-99. doi : 10.1016/j.crhy.2009.02.002. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2009.02.002/
[1] et al. Measurements and modeling of the magnetic near field radiated by a Buck chopper, IEEE Transactions on Electromagnetic Compatibility, Volume 50 (2008), pp. 445-449
[2] et al. Modeling magnetic radiations of electronic circuits using near-field scanning method, IEEE Transactions on Electromagnetic Compatibility, Volume 49 (2007), pp. 391-400
[3] et al. A genetic algorithm based method for source identification and far-field radiated emissions prediction from near-field measurements for PCB characterization, IEEE Transactions on Electromagnetic Compatibility, Volume 43 (2001), pp. 520-530
[4] Antennes ; 1 – Introduction Générale, Masson, Paris, 1977
[5] Genetic Algorithms + Data Structures = Evolution Programs, Springer, 1996
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