Commande Neuro Floue D Une Machine Lectrique
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Commande neuro-floue d'une machine électrique
Author: Fethia Hamidia
language: fr
Publisher: Editions Universitaires Europeennes
Release Date: 2014-07-18
La commande directe du couple (DTC) presente une solution tres interessante aux problemes rencontres dans les autres strategies de commande des machines a courant alternatif, cependant l'utilisation d'un regulateur a hysteresis echantillonne dans cette commande dite DTC conduit a un fonctionnement a frequence de commutation variable, ceci entraine des problemes lies au bruit acoustique genere par le moteur. Afin d'ameliorer les performances de la DTC conventionnelle (qui se base sur l'utilisation du regulateur a hysteresis), ce travail, propose des approches intelligentes basees sur la logique floue, les reseaux de neurones et les systemes neuro-flous, pour minimiser en premier lieu les ondulations du couple electromagnetique, et compenser la variation de la resistance statorique a basse vitesse (le seul parametre utilise dans la DTC, et seule la variation de celle-ci degrade les performances du systeme), en remplacant en second lieu le regulateur de la vitesse conventionnel par des regulateurs intelligents. Toutes ces approches ont ete appliquees a la machine synchrone a aimants permanents MSAP et a la machine asynchrone a cage d'ecureuil MAS.
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