MESSINE, a Parametric Three-Dimensional Eddy Current Model

A parametric three-dimensional eddy current model is proposed. It first discretizes the eddy current distribution into current loops. A parametric description of the shape of these loops is given according to the observations made with a finite-element code. The inductances and the resistances of the current loops are then calculated. By considering the system constituted of the coil and the current loops as a ``multitransformer,'' their current intensity is determined. The impedance change can then be deduced. The model is validated in the case of an axisymmetric configuration. The proposed model is applied to a three-dimensional configuration. Comparisons with experimental results are sufficiently conclusive to validate the model approach.