Stator-interlaminar-fault detection using an external-flux-density sensor / Romary, Raphael in IEEE transactions on industrial electronics, Vol. 57 N° 1 (Janvier 2010)  

Public ISBD [article]  inIEEE transactions on industrial electronics > Vol. 57 N° 1 (Janvier 2010) . - pp. 237 - 243 Titre : Stator-interlaminar-fault detection using an external-flux-density sensor Type de document : texte imprimé Auteurs : Romary, Raphael, Auteur ; Jelassi, Sana, Auteur ; Brudny, Jean François, Auteur Article en page(s) : pp. 237 - 243 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : AC generators Fault diagnosis Insulation testing Magnetic-field measurement Maintenance Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents the results of a research work devoted to the detection of short circuits between stator laminations of an electrical machine using external magnetic field. The theoretical developments lead one to display the influence of various phenomena on this magnetic field in a wide frequency range. It is shown that surface currents due to burrs at the external surface of the machine have an important contribution compared to the increase of eddy currents in the short-circuit volume. Finally, experimental measurements confirm this theory, and an online method of detection for large generators is proposed. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208383 [article] Stator-interlaminar-fault detection using an external-flux-density sensor [texte imprimé] / Romary, Raphael, Auteur ; Jelassi, Sana, Auteur ; Brudny, Jean François, Auteur . - pp. 237 - 243. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 1 (Janvier 2010) . - pp. 237 - 243 Mots-clés : AC generators Fault diagnosis Insulation testing Magnetic-field measurement Maintenance Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents the results of a research work devoted to the detection of short circuits between stator laminations of an electrical machine using external magnetic field. The theoretical developments lead one to display the influence of various phenomena on this magnetic field in a wide frequency range. It is shown that surface currents due to burrs at the external surface of the machine have an important contribution compared to the increase of eddy currents in the short-circuit volume. Finally, experimental measurements confirm this theory, and an online method of detection for large generators is proposed. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208383

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