Y. Kamiya et T. Onuki, EDDY-CURRENT ANALYSIS BY THE FINITE-ELEMENT METHOD USING DOUBLE NODESTECHNIQUE, IEEE transactions on magnetics, 32(3), 1996, pp. 741-744
There are several difficulties in calculating eddy currents in plates
with thin slits by the finite element method (FEM). Under the influenc
e of flat finite elements at slits, the accuracy of analysis decreases
and the computation time increases. In this paper, using the A - phi
method, we propose a novel technique, which overcomes those defects. T
he feature of the method is to adopt double nodes for the electric sca
lar potential phi at slits, but not to the magnetic vector potential A
. Adopting this technique, slits are equivalent to current barriers th
at have infinitesimal width. Some numerical results, which show the va
lidity of the proposed method, are also presented.