LAUSR

Recently, and during the measurements of core losses in electrical steel laminations, it has been observed that as the excitation frequency of the rotating field increases the measured hysteresis B-H loop rotates around the origin, thus, a lower frequency loop seems to slide out of the higher frequency loop. This phenomenon complicates the frequency-dependent modeling of hysteresis under rotating fields and causes inaccurate prediction of core losses when conventional hysteresis models are used. In this study, a frequency-dependent Prandtl–Ishlinskii (FDPI) hysteresis model is proposed to characterize the hysteresis loops under rotating magnetic fields at different frequencies. The proposed FDPI model shows a decent level of accuracy in the prediction task of hysteresis loops at different frequencies.