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Nonlinear eddy current effects in ferromagnetic materials in the presence of DC magnetic fields

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1 Author(s)
R. Rabinovici ; Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of Negev, Beer-Sheva, Israel

Eddy current effects in nonlinear ferromagnetic materials in the presence of a supplementary DC magnetic field are analyzed. The analysis is for a one-dimensional configuration, a semi-infinite plate magnetized homogeneously in a direction parallel to its surface. The nonlinear magnetization characteristic of the ferromagnetic plate material is assumed to be of a step-function form. Solutions of the electric field intensity on the plate surface, the penetration depth of eddy currents in the plate, the eddy current losses, and surface impedance in the presence of a DC magnetic field are obtained. A connection is found between the values obtained in simultaneous DC and AC magnetization conditions and the values obtained in the case of only AC magnetic field excitation.

Published in:

IEEE Transactions on Magnetics  (Volume:27 ,  Issue: 4 )