Parametric Analysis of Transient Temperature Distributions in Thin Moving Sheets Warmed by Transverse Flux Induction Heating Devices

A parametric analysis of a transverse flux induction heating (TFIH) device has been carried out to evaluate the influence of the magnetic core geometry on eddy-currents and temperature distributions within non-ferromagnetic moving metal strips. The solution of the three-dimensional (3D) time-varying problem is formulated by an integral approach which reduces the non-linear electromagnetic and thermal coupled problem to the analysis of two equivalent electrical networks. Alternating the solution of the electromagnetic and thermal equilibrium equations, associated to the equivalent electrical networks, the non-linear coupled problem is solved iteratively, in order to account for the temperature dependence of all physical parameters. Numerical results show that small geometrical modifications of the magnetic core configuration alter significantly the output transversal profile of the sheet temperature