INTRODUCTION OF A DYNAMICAL MODEL OF MATE RIAL IN THE MAGNETIC-FIELD DIFFUSION EQUATION

The knowledge of the dynamical behavior of magnetic materials is of fi rst importance in the iron losses prediction. For the simple shaped Ep stein frame, the field diffusion equation resolution in the lamination s cross section, limited to eddy currents, leads to inaccurate results . This paper presents a simple method to take into account dynamical d istributed phenomena in the field diffusion equation. The study will b e limited to dynamical first magnetization excitations.