Title :
A study on eddy-current losses in rotors of surface permanent magnet synchronous machines
Author :
Nakano, M. ; Kometani, Haruyuki
Author_Institution :
Adv. Technol. R&D Center, Mitsubishi Electr. Corp., Hyogo, Japan
Abstract :
We investigate eddy-current losses in rotors of surface permanent magnet synchronous machines, which have concentrated armature windings. By FEM analysis, it is clear that eddy-current losses in rotors are apparently different at rated current if the pole and slot combinations are different. The distribution of eddy-current density in the rotor is closely related with asynchronous components of the armature MMF. If the armature MMF has a low order of spatial harmonic component, which is not synchronous with the rotor, eddy-current losses are large amount.
Keywords :
eddy current losses; finite element analysis; harmonics; permanent magnet machines; rotors; synchronous machines; FEM analysis; armature MMF; armature windings; asynchronous components; eddy-current density; eddy-current losses; finite element method; magnetomotive force; permanent magnet synchronous machines; pole; rotors; slot; spatial harmonic component; Conducting materials; Eddy currents; Machine windings; Magnetic analysis; Magnetic materials; Permanent magnet machines; Permanent magnets; Rotors; Stator cores; Synchronous motors;
Conference_Titel :
Industry Applications Conference, 2004. 39th IAS Annual Meeting. Conference Record of the 2004 IEEE
Print_ISBN :
0-7803-8486-5
DOI :
10.1109/IAS.2004.1348699
