Affiliations: [a] Institute of Electrical Machines, RWTH Aachen University, Aachen, Germany | [b] Department of Industrial Engineering, University of Padova, Padova, Veneto, Italy
Correspondence:
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Corresponding author: G. Bavendiek, Institute of Electrical Machines, RWTH Aachen University, Aachen, Germany. E-mail: Gregor.Bavendiek@iem.rwth-aachen.de.
Abstract: Permanent magnets need to be magnetized with a high magnetic field for retaining their maximum polarization. If the magnetizing field is not sufficiently high, the permanent magnet will not reach its maximum energy product. Additionally, the magnet easily suffers demagnetization because the remanence and coercive field will drop in highly non-linear characteristic. This paper presents an approach which models the local magnetization of permanent magnets during and after impulse magnetization. Common hysteresis models are not capable of modelling the impact of virgin magnetization on demagnetization behavior of permanent magnets. Therefore, measurements suit as interpolation basis for the finite element method.
