A simple offline technique for evaluating the condition of aluminum–electrolytic–capacitors / Amaral, Acacio Manuel Raposo in IEEE transactions on industrial electronics, Vol. 56 N° 8 (Août 2009)  

Public ISBD [article]  inIEEE transactions on industrial electronics > Vol. 56 N° 8 (Août 2009) . - pp. 3230 - 3237 Titre : A simple offline technique for evaluating the condition of aluminum–electrolytic–capacitors Type de document : texte imprimé Auteurs : Amaral, Acacio Manuel Raposo, Auteur ; Cardoso, A. J. Marques, Auteur Article en page(s) : pp. 3230 - 3237 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Capacitance Discrete Fourier transform (DFT) Dissipation factor Electrolytic capacitors Equivalent series resistance (ESR) Fault diagnosis Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a very simple technique to estimate the condition of aluminum-electrolytic-capacitors. The aging of aluminum-electrolytic-capacitors is expressed by the increase of their equivalent series resistance (ESR) and the reduction of their capacitance. Thus, the proposed technique is based on the estimation of both the ESR and capacitance values. To implement the proposed technique, the capacitor is fed by a sinusoidal voltage with the required power. The resultant impedance vector defined by the capacitor voltage and current gives enough information to estimate the condition of the capacitor. DEWEY : 21.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4926189 [article] A simple offline technique for evaluating the condition of aluminum–electrolytic–capacitors [texte imprimé] / Amaral, Acacio Manuel Raposo, Auteur ; Cardoso, A. J. Marques, Auteur . - pp. 3230 - 3237. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 8 (Août 2009) . - pp. 3230 - 3237 Mots-clés : Capacitance Discrete Fourier transform (DFT) Dissipation factor Electrolytic capacitors Equivalent series resistance (ESR) Fault diagnosis Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a very simple technique to estimate the condition of aluminum-electrolytic-capacitors. The aging of aluminum-electrolytic-capacitors is expressed by the increase of their equivalent series resistance (ESR) and the reduction of their capacitance. Thus, the proposed technique is based on the estimation of both the ESR and capacitance values. To implement the proposed technique, the capacitor is fed by a sinusoidal voltage with the required power. The resultant impedance vector defined by the capacitor voltage and current gives enough information to estimate the condition of the capacitor. DEWEY : 21.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4926189

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The use of the instantaneous-reactive-power signature analysis for rotor-cage-fault diagnostics in three-phase induction motors / Drif, M'hamed in IEEE transactions on industrial electronics, Vol. 56 N° 11 (Novembre 2009)  

Public ISBD [article]  inIEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4606 - 4614 Titre : The use of the instantaneous-reactive-power signature analysis for rotor-cage-fault diagnostics in three-phase induction motors Type de document : texte imprimé Auteurs : Drif, M'hamed, Auteur ; Cardoso, A. J. Marques, Auteur Article en page(s) : pp. 4606 - 4614 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Fault-severity factor Induction motors (IMs) Instantaneous-reactive-power signature analysis (IRPSA) Rotor-cage-fault diagnosis Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a new detection technique based on the instantaneous-reactive-power signature analysis is proposed for the diagnosis of rotor-cage faults (RCFs) in operating three-phase induction motors (IMs). This technique has been tested through the simulation of two different IMs using a mathematical model based on the winding-function approach. In order to demonstrate the capability of the proposed tool for rotor-condition monitoring, these simulations are complemented by the experimental results obtained from two IMs with several faulty rotors, powered from sinusoidal and nonsinusoidal supply voltages. The results obtained by the fast-Fourier-transform algorithm and the Welch method show the merits of the proposed approach for the detection of RCFs. A suitable fault-severity factor is also proposed as an indicator of the motor condition. Moreover, the inductive reactive effect of RCFs is underlined to demonstrate the effectiveness and convenience of this new technique for the diagnosis of RCFs in three-phase IMs. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5196746 [article] The use of the instantaneous-reactive-power signature analysis for rotor-cage-fault diagnostics in three-phase induction motors [texte imprimé] / Drif, M'hamed, Auteur ; Cardoso, A. J. Marques, Auteur . - pp. 4606 - 4614. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 11 (Novembre 2009) . - pp. 4606 - 4614 Mots-clés : Fault-severity factor Induction motors (IMs) Instantaneous-reactive-power signature analysis (IRPSA) Rotor-cage-fault diagnosis Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a new detection technique based on the instantaneous-reactive-power signature analysis is proposed for the diagnosis of rotor-cage faults (RCFs) in operating three-phase induction motors (IMs). This technique has been tested through the simulation of two different IMs using a mathematical model based on the winding-function approach. In order to demonstrate the capability of the proposed tool for rotor-condition monitoring, these simulations are complemented by the experimental results obtained from two IMs with several faulty rotors, powered from sinusoidal and nonsinusoidal supply voltages. The results obtained by the fast-Fourier-transform algorithm and the Welch method show the merits of the proposed approach for the detection of RCFs. A suitable fault-severity factor is also proposed as an indicator of the motor condition. Moreover, the inductive reactive effect of RCFs is underlined to demonstrate the effectiveness and convenience of this new technique for the diagnosis of RCFs in three-phase IMs. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5196746

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