Model Order Reduction of an axial magnetic bearing

We introduce a model order reduction (MOR) method applied to the simulation of an axial active magnetic bearing (AMB) which is based on Finite Element discretisation of non-linear magneto-dynamic Maxwell’s equations coupled with circuit equations and a moving part (rotor that can only move in one axis). In order to speed up the computation time, we studied a MOR based on the Proper Orthogonal Decomposition (POD) to reduce the order of the problem coupled with the Discrete Empirical Interpolation Method (DEIM) to deal with the nonlinearity. We introduce a way to consider the rotor’s displacement, which do not require remeshing, and is compatible with such a method. The technique is evaluated on a 2D axisymetrical axial magnetic bearing model. This technique allows a speed up about a minimun of 2 times faster than the full size model.