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MA: Fachverband Magnetismus
MA 57: Posters Magnetism II
MA 57.47: Poster
Donnerstag, 19. März 2020, 15:00–18:00, P3
Model Based Characterization of Conductive Magnetic Bulk Materials for High Frequency Applications — •Lennart Schwan1,2, Andreas Hütten2, and Sonja Schöning1 — 1Bielefeld Institute for Applied Materials Research (BIfAM), Bielefeld University of Applied Sciences, Department of Engineering Sciences and Mathematics, Interaktion 1, 33619 Bielefeld — 2Thin Films & Physics of Nanostructures, Bielefeld University, Department of Physics, Universitätsstrasse 25, 33615 Bielefeld, Germany
FEM simulations are a powerful tool for the optimization of industrial high frequency applications such as induction hobs. These simulations require reliable material parameters. Magnetic bulk materials for industrial electrical applications are usually characterized with the help of ring samples, which act as magnetic core. Two coils are wound around the core to generate the magnetic field and measure the induced voltage to calculate the magnetic flux density. With increasing frequency and depending on conductivity and relative permeability the skin effect influences the measurement and makes it difficult to determine parameters characterizing the entire material. The skin effect prevents the magnetic field from completely penetrating the sample, which is normally not considered by conventional analytic approaches simply assuming a homogeneous magnetization of the magnetic core. Here, we propose an alternative model approach based on an analytical solution of Maxwell Equations representing a simplified description of the magnetic core including the skin effect in order to extract useful material parameter as input for FEM simulations.