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Analysis and detection of short circuits in fractional horsepower commutator machines / Retana, R. in IEEE transactions on energy conversion, Vol. 23 n°2 (Juin 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 n°2 (Juin 2008) . - pp. 484 - 491 Titre : Analysis and detection of short circuits in fractional horsepower commutator machines Type de document : texte imprimé Auteurs : Retana, R., Auteur ; Paweletz, A., Auteur ; Herzog, H., Auteur Année de publication : 2008 Article en page(s) : pp. 484 - 491 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Commutator  motors;  fault  diagnosis;  harmonics;  short-circuit  currents Résumé : An improved mathematical model for transient simulations of commutator machines is presented in this paper. This model can simulate and predict the line current harmonics during healthy and faulty operation conditions. A lumped parameter model that considers every single coil in the stator and rotor as a separate electrical and magnetic circuit is proposed. Self and mutual inductances of the coils are estimated by means of the winding function approach (WFA), accounting for the most relevant space harmonics in the machine air gap. The commutation is modeled by using the real brush width and assuming that the brush-commutator contact resistance is a function uniquely of their contact area, which depends on the armature position. Short circuits between adjacent commutator bars are investigated. It is shown that the model achieves good accuracy, reproducing fairly well the armature current ripple for healthy and faulty operation of the machine. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4476138&sortType%3Das [...] [article] Analysis and detection of short circuits in fractional horsepower commutator machines [texte imprimé] / Retana, R., Auteur ; Paweletz, A., Auteur ; Herzog, H., Auteur . - 2008 . - pp. 484 - 491. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 n°2 (Juin 2008) . - pp. 484 - 491 Mots-clés : Commutator  motors;  fault  diagnosis;  harmonics;  short-circuit  currents Résumé : An improved mathematical model for transient simulations of commutator machines is presented in this paper. This model can simulate and predict the line current harmonics during healthy and faulty operation conditions. A lumped parameter model that considers every single coil in the stator and rotor as a separate electrical and magnetic circuit is proposed. Self and mutual inductances of the coils are estimated by means of the winding function approach (WFA), accounting for the most relevant space harmonics in the machine air gap. The commutation is modeled by using the real brush width and assuming that the brush-commutator contact resistance is a function uniquely of their contact area, which depends on the armature position. Short circuits between adjacent commutator bars are investigated. It is shown that the model achieves good accuracy, reproducing fairly well the armature current ripple for healthy and faulty operation of the machine. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4476138&sortType%3Das [...]