2D NONLINEAR FINITE-ELEMENT MODELING OF ELECTROMAGNETIC RETARDERS USING TIME-STEPPING ALGORITHMS, AND THE PETROV-GALERKIN METHOD WITH HOMOGENIZATION TECHNIQUES

This paper describes a method for finite element modelling of transien t 2D eddy currents in the nonlinear moving conductor of an electromagn etic retarder, The magnetic vector potential A formulation is used, wi th a general single-step time-marching algorithm, and the fixed and mo ving coordinate systems are compared, A homogenization technique, insp ired by the lamination modelling, is used to make the geometry of a mo ving region invariant direct method to compute the steady state eddy c urrents in the whole rotor. Results are compared to measurements.