An Improved Centered Cycle Method for Identifying the Preisach Distribution Function

This paper proposes an improved centered cycle method for identifying the Preisach distribution function based on the non-uniform discretization. The principle and the limits of the centered cycle method are first introduced. Then, the non-uniform discretization method is proposed based on the curvature of the anhysteretic magnetization curve. The numbers of loops for identifying the distribution function are decided by the proportion of the integral of curvature. The method to determine the cell values of the non-uniformly discrete Preisach triangle is also introduced. The proposed method is validated by the laboratory test of a toroidal sample. The results show the higher precision of the proposed method for predicting the hysteresis loop than the centered cycle method by the same number of loops used for identifying.