A New Hysteresis Loss Estimation in the Induction Motor Core Considering Rotating Magnetic Fields

A rotating machine such as inductor motor has highly distorted elliptical magnetic flux densities in its stator core. The iron loss estimation taking into account the rotating magnetic field is significant not only for the design but also for the performance analysis of electrical machines. A rotational hysteresis loss formula is also proposed to improve the computation accuracy especially when the magnetic flux density is high or the axis ration of a rotational magnetic flux density is big. For an induction motor core model, iron losses are experimentally measured on the top sheet of the core by using a self-developed B-H vector sensor. The proposed iron loss model is validated through comparisons of the calculated iron losses with experimentally measured ones.