MODELS OF THE MAGNETIC-BEHAVIOR OF GO AND NO (3.2 WT-PERCENT SI) AND RAPIDLY QUENCHED (6.5 WT-PERCENT SI) IRON SILICON ALLOYS

The magnetic behaviours of grain-oriented, non-oriented and rapidly quenched iron-silicon alloys are modeled according two analytical models. The first one (Wong's model) describes the variations of the induction B as a fraction of (H +/- H(c)). The second (Gonda's model) defines the B behaviour as an exponential function of (H +/- H(c)). The fit characterized by the difference between experimental and analytical hysteresis loops, has been investigated as a function of maximum induction and frequency. According to the material grade, the domain validity of each model is defined.