3-D Generic Magnetic Equivalent Circuit Taking into Account Skin Effect: Magnetic Field and Eddy-Current Losses

In this paper, a three-dimensional (3-D) generic magnetic equivalent circuit (MEC) in Cartesian coordinates considering the skin effect is developed. This model has been applied to a U-cored static electromagnetic device. The main objective is to compute the magnetic field behaviour in massive conductive parts (viz. aluminium) and to predict the impact of the eddy-current magnetic fields in the neighbouring nonconductive parts. The classical magnetomotive force (MMF) distribution has been modified by integrating the MMF produced by the eddy currents that occur in massive conductive regions. The eddy-current MMF was introduced by formula which derived from magnetodynamic Maxwell’s equations. Both experimental tests and three-dimensional (3-D) finite-element analysis (FEA) have been used to prove the validity of the proposed approach.