QUASI-ANALYTICAL MODEL FOR EDDY CURRENTS AND FORCES ANALYSIS IN AXISYMMETRICAL GEOMETRIES WITH MOVING CONDUCTORS

In this paper a quasi-analytical model for the analysis of eddy curren ts distributions and forces in axisymmetric systems with conductors in motion is presented. The model is based on the analytical solution of the vector potential formulation of the Maxwell Equations for a sinus oidal steady state regime relating to an axially infinite geometry wit h conductors moving at a constant velocity. When the conductors move a t a constant velocity, the model allows the analysis of axially infini te geometries for every kind of excitation waveforms. Finite axial geo metries are considered, for iron free systems, superimposing two solut ions relating to axially Infinite geometries. The model can be used fo r the analysis of different devices, and a particularly useful applica tion for the analysis of the transient induced voltage in a Non Destru ctive Testing system is shown.