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An Efficient Harmonic Method for Solving Nonlinear Time-Periodic Eddy-Current Problems

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2 Author(s)
Ciric, I.R. ; Dept. of Electr. & Comput. Eng., Manitoba Univ., Winnipeg, Man. ; Hantila, F.I.

An iterative solution to nonlinear problems of time-periodic eddy currents is performed by directly using the time-harmonic content of the field quantities instead of time-domain techniques employing successive time steps. A linear sinusoidal steady-state field problem is solved to determine the magnetization harmonics at each iteration, with the harmonic values corrected in terms of the actual magnetic induction by applying a fixed-point procedure. To further improve its efficiency, the solution process can be started by retaining a small number of harmonics, with more harmonics subsequently added as needed to achieve the desired accuracy. The proposed method always yields stable results, even when the characteristic B-H is strongly nonlinear, and has a superior computational efficiency with respect to various time-stepping techniques and to the "harmonic balance method."

Published in:

Magnetics, IEEE Transactions on  (Volume:43 ,  Issue: 4 )

Date of Publication:

April 2007

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