Electromagnetic field diffusion in axisymmetric hysteretic cores

Summary form only given. The analysis of electromagnetic field diffusion is essential in different engineering applications, such as the design of electrical machines and actuators, induction heating, etc. This problem is often made complex by the hysteretic behaviour of the ferromagnetic materials, by eddy currents arising in the core and by the interaction with the supply circuit. This paper presents a 2D Finite Element model for the computation of the transient evolution of electromagnetic quantifies in a ferromagnetic core involving hysteresis. This approach can handle axisymmetric structures, where the presence of eddy currents, flowing along circular paths, significantly influences the diffusion of magnetic field. The model also includes the interaction with the supply circuits (voltage driven problems).