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

Volume

42

Issue

2

fYear

2006

Firstpage

429

Lastpage

435

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;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2006.870037

Filename

1608220