Convergence Stabilization of E&S Vector Hysteresis Model Incorporated With Finite Element Analysis of Electrical Machines

This paper presents a convergence stabilization method of E&S vector hysteresis model when it is combined with nonlinear finite element analysis (FEA). In order to ensure the stable convergence, an additional nonlinear iterative procedure with a relaxation method is incorporated with the conventional nonlinear FEA, and adaptive determination of relaxation factor during the nonlinear iteration is suggested. The effectiveness of the suggested method is verified through a comparison of the numerical results from the suggested and conventional methods.