Computing Eddy Currents in Permanent Magnet Synchronous Machines by a 3D Finite Element Model without Motion

摘要

In this paper, a new method is presented for simulating three-dimensional eddy currents in the permanent magnets of a synchronous machine with surface mounted magnets. The method uses the T,Φ-Φ formulation with a position and time dependent boundary condition on the stator surface. The tangential component of the magnetic field intensity there is determined by magneto-static simulations. The method is justified by comparing the boundary values obtained by two-dimensional analyses with and without eddy currents.