FEM-Supported and Non-Destructive Magnetic Characterization Method for Non-Laminated Steel

Abstract:
For magnetic characterization where the influence of eddy current effects cannot be prevented by given measurement conditions, like insufficient lamination, other approaches are needed to eliminate their impact. This paper presents a Finite Element Method (FEM)-based method for B-H curve determination for non-laminated steel where non-significant eddy current effects influence the results. In addition to the conventional hysteresis measurement, the sample is simulated in FEM to generate a compensation for achieving the most accurate characterization. An example material characterization is performed and its result is used to simulate the magnetic force on a test device. These simulation results were then compared with measurements for verification. As these experimental verification demonstrates, simulations with compensated material characteristic achieve a more accurate result than uncompensated. The method is not limited to a specific sample shape and can therefore be used for different materials, core shapes and applications.