Modeling Demagnetization Effects in Permanent Magnet Synchronous Machines

Abstract-This paper presents a permanent magnet model which takes temperature dependencies and demagnetization effects into account. The proposed model is integrated into a magnetic fundamental wave machine model using the model- ing language Modelica. For different rotor types permanent magnet models are developed. The simulation results of the Modelica are compared with measurement results. Addition- ally, the fundamental wave model is compared to a finite element analysis in order to assess the applicability of the proposed model. Index Terms-Permanent magnet synchronous machine, demagnetization, temperature dependent, fundamental wave model, Modelica