Title :
A study on eddy-current losses in rotors of surface permanent-magnet synchronous machines
Author :
Nakano, Masatsugu ; Kometani, Haruyuki ; Kawamura, Mitsuhiro
Author_Institution :
Adv. Technol. R&D Center, Mitsubishi Electr. Corp., Hyogo, Japan
Abstract :
In this paper, we investigate the Eddy current (EC) losses in the rotors of surface permanent-magnet (PM) synchronous machines, which have concentrated armature windings. By the finite-element method (FEM) analysis, it is clear that the EC losses in rotors are apparently different at rated currents if the pole and slot combinations are different. The distribution of the EC density in the rotor is closely related with the asynchronous components of the armature magnetomotive force (MMF). If the armature MMF has a low order of spatial harmonic components, which is not synchronous with the rotor, the EC losses are of large amounts.
Keywords :
eddy current losses; finite element analysis; permanent magnet machines; rotors; synchronous machines; FEM; MMF; armature magnetomotive force; concentrated armature windings; eddy-current losses; finite element method; rotors; surface permanent-magnet synchronous machines; Eddy currents; Finite element methods; Industry Applications Society; Machine windings; Rotors; Stators; Synchronous machines; Synchronous motors; Temperature; Torque; Eddy current (EC); loss; magnetomotive force (MMF); rotor; surface permanent-magnet synchronous machine;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2006.870037
