Numerical solution of eddy current problems in ferromagnetic bodies travelling in a transverse magnetic field

Abstract

SUMMARYEddy currents are investigated in a ferromagnetic bar travelling in a transverse magnetic ÿeld. Such an open boundary ÿeld problem is analysed by a hybrid approach based on Galerkin ÿnite element formulation coupled with a separation of variables. A steady state is considered, introducing time-periodic boundary conditions. The resultant system of non-linear equations is solved by an iterative procedure based on Brouwer's ÿxed-point theorem. Numerical results are presented for a bar of circular crosssection made of cast steel or cast iron. Selected examples of the ÿeld distribution and characteristics of eddy-current power losses are enclosed in graphic form.

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