Documents disponibles écrits par cet auteur

A schwarz–christoffel-based analytical method for electric machine field analysis / O'Connell, T.C. in IEEE transactions on energy conversion, Vol. 24 N° 3 (Septembre 2009) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 24 N° 3 (Septembre 2009) . - 565 - 577 Titre : A schwarz–christoffel-based analytical method for electric machine field analysis Type de document : texte imprimé Auteurs : O'Connell, T.C., Auteur ; Krein, Philip T., Auteur Année de publication : 2010 Article en page(s) : 565 - 577 Note générale : Energy Conversion Langues : Anglais (eng) Mots-clés : Asynchronous  machines--Electric  machine--Analysis  computing--Magnetic  materials Résumé : With the recent increase in the availability and widespread use of inverters, exotic rare earth permanent-magnet materials, and low-cost, precision manufacturing, new design tools are needed to aid engineers in designing state-of-the-art electromechanical systems. For this purpose, recent software advances allow a reexamination of previously intractable analytical solutions to the boundary value problems governing these systems. This paper presents an analytical field analysis method for electric machines utilizing the Schwarz-Christoffel transformation and implemented with the SC Toolbox software package. With the method, general 2-D electric machine cross sections with linear magnetic materials are analyzed. The method is then extended using superposition to analyze wound-rotor induction machines in the time domain. With this extension, numerous machine geometries, stator excitations, winding and slot harmonics, and torque ripple can be examined. Note de contenu : Bibiogr. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5224013&sortType%3Das [...] [article] A schwarz–christoffel-based analytical method for electric machine field analysis [texte imprimé] / O'Connell, T.C., Auteur ; Krein, Philip T., Auteur . - 2010 . - 565 - 577. Energy Conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N° 3 (Septembre 2009) . - 565 - 577 Mots-clés : Asynchronous  machines--Electric  machine--Analysis  computing--Magnetic  materials Résumé : With the recent increase in the availability and widespread use of inverters, exotic rare earth permanent-magnet materials, and low-cost, precision manufacturing, new design tools are needed to aid engineers in designing state-of-the-art electromechanical systems. For this purpose, recent software advances allow a reexamination of previously intractable analytical solutions to the boundary value problems governing these systems. This paper presents an analytical field analysis method for electric machines utilizing the Schwarz-Christoffel transformation and implemented with the SC Toolbox software package. With the method, general 2-D electric machine cross sections with linear magnetic materials are analyzed. The method is then extended using superposition to analyze wound-rotor induction machines in the time domain. With this extension, numerous machine geometries, stator excitations, winding and slot harmonics, and torque ripple can be examined. Note de contenu : Bibiogr. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5224013&sortType%3Das [...]

A time-harmonic three-dimensional vector boundary element model for electromechanical devices / O'Connell, T.C. 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. 606 - 618 Titre : A time-harmonic three-dimensional vector boundary element model for electromechanical devices Type de document : texte imprimé Auteurs : O'Connell, T.C., Auteur ; Krein, P.T., Auteur Année de publication : 2011 Article en page(s) : pp. 606 - 618 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : boundary-elements  methods;  boundary-value  problems;  electric  machines;  finite  element  analysis;  machine  theory;  matrix  algebra Résumé : In present practice, the most effective way to solve the large electromagnetic (EM) boundary value problems typical in electromechanical device analysis has been with the finite element method (FEM). The sparse, symmetric, and banded structure of FEM system matrices reduces the memory requirements and facilitates several fast and efficient solution algorithms. An alternative, boundary element methods (BEM), is more computationally intensive. Recently, however, fast and efficient solver codes have been developed for BEM solutions of EM scattering problems. These, if effectively implemented in electromechanical device models, can make BEM a more feasible alternative for this purpose than previously. To generate a deeper understanding of this alternative formulation in the context of electromechanics problems, a time-harmonic 3-D vector BEM model for electromechanical devices is presented that is formulated in terms of the field variables and is capable of modeling multiple separated homogeneous regions with or without eddy currents. Extensions to electric machine modeling are given, and the model is assessed using experimental data. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5437340&sortType%3Das [...] [article] A time-harmonic three-dimensional vector boundary element model for electromechanical devices [texte imprimé] / O'Connell, T.C., Auteur ; Krein, P.T., Auteur . - 2011 . - pp. 606 - 618. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 606 - 618 Mots-clés : boundary-elements  methods;  boundary-value  problems;  electric  machines;  finite  element  analysis;  machine  theory;  matrix  algebra Résumé : In present practice, the most effective way to solve the large electromagnetic (EM) boundary value problems typical in electromechanical device analysis has been with the finite element method (FEM). The sparse, symmetric, and banded structure of FEM system matrices reduces the memory requirements and facilitates several fast and efficient solution algorithms. An alternative, boundary element methods (BEM), is more computationally intensive. Recently, however, fast and efficient solver codes have been developed for BEM solutions of EM scattering problems. These, if effectively implemented in electromechanical device models, can make BEM a more feasible alternative for this purpose than previously. To generate a deeper understanding of this alternative formulation in the context of electromechanics problems, a time-harmonic 3-D vector BEM model for electromechanical devices is presented that is formulated in terms of the field variables and is capable of modeling multiple separated homogeneous regions with or without eddy currents. Extensions to electric machine modeling are given, and the model is assessed using experimental data. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5437340&sortType%3Das [...]