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

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 ⩽Jp⩽ 1.7 T). The results have been analyzed for each Jp 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 Jp and the ellipticity parameter only. This brings about substantial simplification in the phenomenological approach to the energy loss prediction under 2D magnetization process.