Title :
Transient magnetic field calculations in hysteretic media with FI/sup 2/TD formulations
Author :
Yuan, Jing ; Clemens, Markus ; Weiland, Thomas
Author_Institution :
Dept. Electr. Eng. & Inf. Technol., Technische Univ. Darmstadt, Germany
Abstract :
The paper presents a computational approach for transient magneto-quasistatic field simulation including hysteretic ferromagnetic materials. The procedure is based on the finite integration implicit time domain formulation (FFTD) combining the inverse Preisach model with the successive approximation (SA) technique. Due to the hysteretic material behavior the definition of the permeability for the hysteretic ferromagnetic materials is modified for the SA technique. In order to improve convergence, a dynamic relaxation process is included. A combination of parabolic interpolation and golden section step based on Brent´s method is selected for determining the relaxation factor which minimizes the norm of the nonlinear system functional at each nonlinear iteration. This approach is compared to the M(H) iterative procedure, i.e., a polarization method that uses the Preisach model. The results of this comparison for a 3D test problem are presented and discussed.
Keywords :
ferromagnetic materials; finite element analysis; magnetic fields; magnetic hysteresis; time-domain analysis; transient analysis; Brent method; dynamic relaxation process; finite integration implicit time domain formulation; hysteretic ferromagnetic materials; hysteretic media; inverse Preisach model; nonlinear iteration; nonlinear system; parabolic interpolation; polarization method; successive approximation technique; transient magnetic field calculations; transient magneto-quasistatic field simulation; Computational modeling; Convergence; Interpolation; Inverse problems; Magnetic domains; Magnetic fields; Magnetic hysteresis; Magnetic materials; Nonlinear dynamical systems; Permeability;
Conference_Titel :
Electrical Machines and Systems, 2003. ICEMS 2003. Sixth International Conference on
Conference_Location :
Beijing, China
Print_ISBN :
7-5062-6210-X