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Eddy-current computation in the claws of a synchronous claw-pole alternator in generator mode

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2 Author(s)
C. Kaehler ; Dept. of Electr. Machines, Aachen Inst. of Technol., Germany ; G. Henneberger

This paper deals with the three-dimensional finite-element (FE) calculation of eddy currents in the claws of a claw-pole alternator taking the rotational geometry movement into account. For this calculation a transient edge-based A&oarr;, A&oarr; - T&oarr; formulation is utilized. The generation of the FE model with a special focus on the discretization of eddy-current regions and air gap is presented. The main intention lies in determining the eddy-current losses in the rotor claws in generator mode at constant speed. Since high-speed and high material conductivity leads to divergence, under-relaxation of the material conductivity in the claws is conducted

Published in:

IEEE Transactions on Magnetics  (Volume:38 ,  Issue: 2 )