MESSINE, a parametric three-dimensional eddy current model

A parametric three-dimensional eddy current model is proposed. It first dis cretizes the eddy current distribution into current loops. A parametric des cription of the shape of these loops is given according to the observations made with a finite-element code. The inductances and the resistances of th e current loops are then calculated. By considering the system constituted of the coil and the current loops as a "multitransformer," their current in tensity is determined. The impedance change can then be deduced. The model is validated in the case of an axisymmetric configuration. The proposed mod el is applied to a three-dimensional configuration. Comparisons with experi mental results are sufficiently conclusive to validate the model approach.