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FEM analysis of eddy current losses in nonlinear laminated iron cores

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3 Author(s)
Preis, K. ; Inst. for Fundamentals & Theor. in Electr. Eng., Graz Univ. of Technol., Austria ; Biro, O. ; Ticar, I.

A finite element method is presented to compute three-dimensional eddy current distributions in nonlinear laminated iron cores. In a first step, the core is assumed to have an anisotropic conductivity of zero value in the direction perpendicular to the laminations. In a second step, the eddy currents within the sheets are computed by solving the nonlinear field problem individually in each layer. The boundary conditions for these essentially two-dimensional analyses are taken from the three dimensional field distribution determined in the first step. Numerical examples prove the validity of the method.

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Magnetics, IEEE Transactions on  (Volume:41 ,  Issue: 5 )