Some numerical calculations of eddy current heating (with using induction plate) were carried out for different layered materials. The 3D finite element method (FEM) was used. The calculations were made with using the eddy current module of a Maxwell/ANSYS software. In order to accelerate the calculations, some simplified numerical models, including symmetries, were tested and compared with a more complex FEM model. Thanks to some symmetries of the analyzed object, it was possible to decrease the calculation time significantly (more than 10 times). With using the simplified model, it was possible to improve the discretization mesh, which decreased the calculation error. Three different materials were analyzed: stainless steel, copper+stainless steel and aluminium+stainless steel. For all materials the eddy current losses, eddy current and magnetic flux density distribution were determined.
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