عنوان مقاله [English]
Most electromagnetic systems work under variable magnetic fields. Fast variation of a magnetic field may cause eddy current and
excess loss in ferromagnetic materials. This paper presents a simple and practical technique in field analysis of electromagnetic systems having dynamic effects (eddy current and excess loss effects). Based on existing formulations for eddy current and
excess loss, an equivalent expression for field intensity has been introduced. A new technique has been presented, in order
to include this expression in the finite element code. A typical system has been modeled by this code. Effects of relaxation and time step were examined on the stability and the convergence rate of the process. The validity of the proposed model has been
checked by comparing its results with experimental measurements.