Analytical Calculation of Rotor Magnet Eddy-Current Losses for High Speed IPMSM

Adel Bettayeb (1) , Xavier Jannot (1) , Jean-Claude Vannier (1)

1 E3S - Supélec Sciences des Systèmes

For high-speed machines applications, eddy-current losses in the interior permanent magnet of synchronous machine (IPMSM) form a portion of the total losses which can be significant. Indeed, the magnets are exposed to the harmonic fields which rotate with respect to the rotor. The induced losses in the magnets provoke temperature arising that must be limited to avoid the risk of demagnetization. The study carries out a prediction of eddy current losses in PM where the skin effect is considered. A complete analytical model is presented and compared to 3D Finite Element (FE) harmonic computations. The results given by the proposed model are in agreement with the FEA results for local electromagnetic quantities and loss calculations. This approach can be useful for losses estimation in magnets when designing machines by analytical method.

Keywords: permanent magnet motor; magnet loss; modeling; high speed

Domains: Electric power

Adel Bettayeb, Xavier Jannot, Jean-Claude Vannier. Analytical Calculation of Rotor Magnet Eddy-Current Losses for High Speed IPMSM. ICEM 2010 – XIX International Conference on Electrical Machines, Sep 2010, Rome, Italy. pp.CD-Rom Proceedings. ⟨hal-00520389⟩