Numerical Analysis of Electromagnetic and Temperature Fields in Induction Heated Ferromagnetic Slabs

Induction heating is widely used for quick heating of conductive materials. Because temperature distribution of the heated body is governed by the eddy current distribution, it is very important to analyse the relation between the two distributions. For heating of ferromagnetic billets, depending on the dimension of the workpiece, typical field strengths H can range from 50 to 200 kA/m and typical supply frequency f can range from 50 to 3000 Hz. At the resulting deep levels of saturation the waveforms for flux density and especially current density become highly distorted.