Documents disponibles écrits par cet auteur

Computation of differential inductance and flux linkage positional derivative by a sensitivity approach / Melgoza, E. in IEEE transactions on energy conversion, Vol. 25 N° 1 (Mars 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25 N° 1 (Mars 2010) . - pp. 237 - 244 Titre : Computation of differential inductance and flux linkage positional derivative by a sensitivity approach Type de document : texte imprimé Auteurs : Melgoza, E., Auteur ; Venegas, V., Auteur ; Escarela-Perez, R., Auteur Année de publication : 2010 Article en page(s) : pp. 237 - 244 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : electric  machines;  finite  element  analysis;  sensitivity  analysis Résumé : The differential inductance and flux linkage positional derivative are important parameters in the analysis and simulation of electrical machines where saturation is nonnegligible. A new method for the computation of these quantities for devices with an arbitrary number of windings is presented. The method is based on the determination of the sensitivity of the magnetic vector potential to variations in the input current vector or the rotor position, in the context of finite-element formulations. The implementation of the proposed method for plane Cartesian and axisymmetric cases is considered in detail. The method and its implementation are verified by comparisons against known inductance formulas or results from other computational methods. In the case of the differential inductance, the proposed scheme is an alternative to energy perturbation methods, while the determination of the flux linkage positional derivative is made in one step for the first time. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5350685&sortType%3Das [...] [article] Computation of differential inductance and flux linkage positional derivative by a sensitivity approach [texte imprimé] / Melgoza, E., Auteur ; Venegas, V., Auteur ; Escarela-Perez, R., Auteur . - 2010 . - pp. 237 - 244. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25 N° 1 (Mars 2010) . - pp. 237 - 244 Mots-clés : electric  machines;  finite  element  analysis;  sensitivity  analysis Résumé : The differential inductance and flux linkage positional derivative are important parameters in the analysis and simulation of electrical machines where saturation is nonnegligible. A new method for the computation of these quantities for devices with an arbitrary number of windings is presented. The method is based on the determination of the sensitivity of the magnetic vector potential to variations in the input current vector or the rotor position, in the context of finite-element formulations. The implementation of the proposed method for plane Cartesian and axisymmetric cases is considered in detail. The method and its implementation are verified by comparisons against known inductance formulas or results from other computational methods. In the case of the differential inductance, the proposed scheme is an alternative to energy perturbation methods, while the determination of the flux linkage positional derivative is made in one step for the first time. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5350685&sortType%3Das [...]

Finite-element inductance computation in 2-D eddy-current systems using sensitivity analysis / Melgoza, E. in IEEE transactions on energy conversion, Vol. 25, N° 3 (Septembre 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 690 - 697 Titre : Finite-element inductance computation in 2-D eddy-current systems using sensitivity analysis Type de document : texte imprimé Auteurs : Melgoza, E., Auteur ; Escarela-Perez, R., Auteur ; José Alvarez-Ramírez, Auteur Année de publication : 2011 Article en page(s) : pp. 690 - 697 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Jacobian  matrices;  asynchronous  machines;  eddy  currents;  finite  element  analysis;  machine  theory;  sensitivity  analysis Résumé : A new finite-element (FE) method for the determination of differential and apparent inductances of massive conductors is proposed using a sensitivity analysis approach. The new technique is a one-step computation procedure in which the definition of distribution vectors makes possible a unified treatment of solid and filamentary conductors. Since massive conductors are included in the formulation, eddy-current and proximity effects are properly considered. The inductance matrix expression, formally derived from the sensitivity analysis, requires only one evaluation of the Jacobian matrix of the FE system at the solution point. As a result, an efficient calculation can be performed using the same solver employed in the FE solution. The computation of a multiport equivalent of an induction machine has been used to show the power of the proposed method. Our FE and multiport network results have been validated using a well-known commercial FE package. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5552141&sortType%3Das [...] [article] Finite-element inductance computation in 2-D eddy-current systems using sensitivity analysis [texte imprimé] / Melgoza, E., Auteur ; Escarela-Perez, R., Auteur ; José Alvarez-Ramírez, Auteur . - 2011 . - pp. 690 - 697. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 690 - 697 Mots-clés : Jacobian  matrices;  asynchronous  machines;  eddy  currents;  finite  element  analysis;  machine  theory;  sensitivity  analysis Résumé : A new finite-element (FE) method for the determination of differential and apparent inductances of massive conductors is proposed using a sensitivity analysis approach. The new technique is a one-step computation procedure in which the definition of distribution vectors makes possible a unified treatment of solid and filamentary conductors. Since massive conductors are included in the formulation, eddy-current and proximity effects are properly considered. The inductance matrix expression, formally derived from the sensitivity analysis, requires only one evaluation of the Jacobian matrix of the FE system at the solution point. As a result, an efficient calculation can be performed using the same solver employed in the FE solution. The computation of a multiport equivalent of an induction machine has been used to show the power of the proposed method. Our FE and multiport network results have been validated using a well-known commercial FE package. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5552141&sortType%3Das [...]