Optimal slot opening width for magnetic noise reduction in induction motors / Jean Le Besnerais in IEEE transactions on energy conversion, Vol. 24 N° 4 (Décembre 2009)  

Optimal slot opening width for magnetic noise reduction in induction motors [texte imprimé] / Jean Le Besnerais, Auteur ; Vincent Lanfranchi, Auteur ; Michel Hecquet, Auteur . - 2010 . - pp. 869 - 874.
energy conversion
Langues : Anglais (eng)
in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 869 - 874

Mots-clés :	Induction motors  magnetic noise
Résumé :	This paper presents a method to characterize the main magnetic force waves occurring in a sinusoidally fed induction machine. Three main force types are identified: slotting force waves, winding force waves, and saturation force waves. Slotting force waves are characterized in terms of number of nodes, velocity, propagation direction, and magnitude. On the ground of the expression of these forces magnitude, a method to cancel a given magnetic force wave by properly choosing the rotor slot or stator slot opening width is presented. This new method is validated with both simulations and experiments. Contrary to the common design rule that advices to decrease rotor and stator slot openings width in order to reduce magnetic noise, it is shown that a wider slot opening can lower the global noise level when properly chosen.
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