The Modified Jiles–Atherton Model for the Accurate Prediction of Iron Losses

Abstract

The Jiles-Atherton (JA) model explains hysteresis phenomenon in a ferromagnetic material through domain wall transitions with five material constants called the JA parameters. These parameters describe the magnetic characteristics of a ferromagnetic material and are identified from the measured saturated B-H loop. However, the JA parameters cannot predict the inner loops accurately and this presents a serious problem for the JA model to be used in finite element based computer-aided design simulations. In this paper, we have proposed a new approach which assumes one of the JA parameters to be a function of magnetic field intensity H, or magnetic flux density B, and requires knowledge of the inner loops. The improvement in the accuracy of the modified JA model has been demonstrated by comparing its predictions with measurements and one of the already published works.