An improved model for flux reversal in Ni-Fe cores

The purpose of this work is to develop a quantitative model for the mechanism of flux reversal in nickel-iron (Ni-Fe) cores. The model allows the prediction of the instantaneous values of magnetic flux during reversal as a function of the applied magnetic-field intensity. Emphasis is placed upon the applicability of the results to practical engineering problems as well as the adherence of the model to the physical description of the process. This paper deals primarily with flux changes in grain-oriented 50% Ni-Fe tape-wound cores; however, the general approach is equally applicable to other alloys and types of core construction.