Documents disponibles écrits par cet auteur

Analysis of critical-speed increase of induction machines via winding reconfiguration with solid-state switches / Fuchs, E. F. in IEEE transactions on energy conversion, Vol. 23 n°3 (Septembre 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 n°3 (Septembre 2008) . - pp. 774 - 780 Titre : Analysis of critical-speed increase of induction machines via winding reconfiguration with solid-state switches Type de document : texte imprimé Auteurs : Fuchs, E. F., Auteur ; Schraud, J., Auteur ; Fuchs, F. S., Auteur Année de publication : 2008 Article en page(s) : pp. 774 - 780 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Angular  velocity  control;  asynchronous  machines;  machine  windings;  switches Résumé : Commonly used speed-control concepts permit speed ranges up to two-three times the base speed via voltage to frequency (V/f), that is, field-weakening control. This paper teaches the extension of the speed-control range up to nine times the base speed through online reconfiguration of the motor windings via electronic switches. The switchover of the windings, either from a winding with p1 poles to p2 poles, or from series to parallel connection of the number of turns per phase-so-called (V/Nldrf) control-lasts less than a 60-Hz cycle. Such fast switchover causes small transients only, and therefore, this concept is applicable to most variable-speed drives. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4544495&sortType%3Das [...] [article] Analysis of critical-speed increase of induction machines via winding reconfiguration with solid-state switches [texte imprimé] / Fuchs, E. F., Auteur ; Schraud, J., Auteur ; Fuchs, F. S., Auteur . - 2008 . - pp. 774 - 780. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 n°3 (Septembre 2008) . - pp. 774 - 780 Mots-clés : Angular  velocity  control;  asynchronous  machines;  machine  windings;  switches Résumé : Commonly used speed-control concepts permit speed ranges up to two-three times the base speed via voltage to frequency (V/f), that is, field-weakening control. This paper teaches the extension of the speed-control range up to nine times the base speed through online reconfiguration of the motor windings via electronic switches. The switchover of the windings, either from a winding with p1 poles to p2 poles, or from series to parallel connection of the number of turns per phase-so-called (V/Nldrf) control-lasts less than a 60-Hz cycle. Such fast switchover causes small transients only, and therefore, this concept is applicable to most variable-speed drives. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4544495&sortType%3Das [...]

Experimental verification of critical-speed increase of single-phase induction machines via winding reconfiguration with solid-state switches / Schraud, J. 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. 460 - 465 Titre : Experimental verification of critical-speed increase of single-phase induction machines via winding reconfiguration with solid-state switches Type de document : texte imprimé Auteurs : Schraud, J., Auteur ; Fuchs, E. F., Auteur ; Fuchs, H. A., Auteur Année de publication : 2008 Article en page(s) : pp. 460 - 465 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Induction  motors;  machine  windings;  power  electronics;  starting;  switching;  switching  circuits Résumé : The concept of online electronic switching of windings will be applied to a single-phase induction motor with two separate windings with different pole numbers p1 = 4 and p2 = 6 and an auxiliary winding required for starting. During switchover from the low-speed winding to the high-speed winding, and vice versa, lasting less than a few milliseconds, small electrical torque and speed transients occur. Relying on closed-loop speed control, a smooth speed response is measured. This concept is, therefore, applicable to variable-speed drives, where a large speed range is desirable. Test data indicate that a speed-control range from 600 to 4000 r/min is obtainable with a single-phase induction motor. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4505397&sortType%3Das [...] [article] Experimental verification of critical-speed increase of single-phase induction machines via winding reconfiguration with solid-state switches [texte imprimé] / Schraud, J., Auteur ; Fuchs, E. F., Auteur ; Fuchs, H. A., Auteur . - 2008 . - pp. 460 - 465. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 n°2 (Juin 2008) . - pp. 460 - 465 Mots-clés : Induction  motors;  machine  windings;  power  electronics;  starting;  switching;  switching  circuits Résumé : The concept of online electronic switching of windings will be applied to a single-phase induction motor with two separate windings with different pole numbers p1 = 4 and p2 = 6 and an auxiliary winding required for starting. During switchover from the low-speed winding to the high-speed winding, and vice versa, lasting less than a few milliseconds, small electrical torque and speed transients occur. Relying on closed-loop speed control, a smooth speed response is measured. This concept is, therefore, applicable to variable-speed drives, where a large speed range is desirable. Test data indicate that a speed-control range from 600 to 4000 r/min is obtainable with a single-phase induction motor. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4505397&sortType%3Das [...]