Modelling of complex permeability in cores

In the numerical field analysis a problem that still remains is the development of magnetic parameter models that accurately represents the effect of magnetic anisotropy under complex magnetic conditions. Two modified approaches have been used for the calculation of complex permeability in oriented FeSi lamination. In the first approach pure relaxation processes have been accepted in model approximation and the hysteresis effects have been taken into account separately neglecting the relaxation. In the second approach, besides separated pure irreversible processes also mixed processes, i.e. relaxation and hysteresis mutually influenced are considered. In weak alternating field these irreversible processes have been represented by Rayleigh loop