Magnetic losses under two-dimensional flux loci in Fe-Si laminations

Abstract Magnetic energy losses have been measured in non-oriented Fe–Si laminations under alternating, elliptical, and circular polarization as a function of frequency (2 Hz ⩽ f ⩽ 200  Hz) and peak magnetization (0.2 T ⩽ J p ⩽ 1.7 T). The results have been analyzed for each J p value applying the concept of loss separation and investigating the evolution of each loss component with the shape of flux loci. It is found that such an evolution is to a good approximation frequency-independent and it is a function of J p and the ellipticity parameter only. This brings about substantial simplification in the phenomenological approach to the energy loss prediction under 2D magnetization process.