Eddy current distribution for a rectangular coil arranged parallel to a moving conductor slab

The behaviour of an eddy current strongly depends on factors such as coil shape, excitation frequency, conductor speed and conductor properties. To analyse the inverse problem (i.e. processing eddy-current-testing data), it is particularly important to quantitatively evaluate the eddy current. In this study, the authors derive an analytical solution for the eddy current distribution for a rectangular coil arranged parallel to a conducting slab. In addition, the authors present the eddy current distribution for various excitation frequencies and conductor speeds.