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Analytical Prediction of Eddy-Current Loss in Armature Windings of Permanent Magnet Brushless AC Machines

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3 Author(s)
Amara, Y. ; Groupe de Rech. en Electrotech. et Autom. du Havre-EA 3220, Univ. of Le Havre, Le Havre, France ; Reghem, P. ; Barakat, G.

This paper presents an analytical model for prediction of eddy current loss in armature windings of permanent magnet brushless AC machines. The developed model can either be used in the case of internal or external rotor radial-field machines topologies. First, a 2-D exact analytical solution of magnetic field distribution in an actual geometry of slotted surface mounted PM radial flux synchronous machines is established. It involves solution of Maxwell's equations in slots, airgap and PM's region. Then, magnetic vector potential solution in the slots is used for prediction of resistance limited eddy current in armature windings. Finally, results from this analytical model are compared to corresponding finite element analyses.

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Magnetics, IEEE Transactions on  (Volume:46 ,  Issue: 8 )