Abstract
This paper proposes a model for the computation of iron losses in steel laminations accounting simultaneously for magnetic hysteresis and eddy currents. The proposed model is well suited for finite element implementation and relies on a consistent thermodynamic background. The focus of this paper is particularly set on a systematic and accurate identification of material parameters from standard dc measurements (Epstein frame, single-sheet tester). Once identified, those material parameters can be used to obtain quantitative predictions of iron losses at higher frequencies and in the presence of higher harmonics. The model and the identification process are validated against measurements for a M235-35 A electrical steel over a wide range of field intensity and frequencies.
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