Investigation on the thermal behavior of the dual-rotor Permanent Magnet Induction Machine

The present paper proposes an investigation of the thermal phenomena caused by Joule losses and iron losses in a novel electric machine, the dual-rotor Permanent Magnet Induction Machine (PMIM). Empirical dimensionless formulations for the computation of convection heat transfer coefficients in each region of the machine are employed together with 3D FEM computation to predict temperature distribution. The analysis of the thermal behavior is equally as important as its electromagnetic design because improper heat transfer design of electrical machines can lead to material damage. The presence of the permanent magnets makes this study essential as it is required to verify that the temperature of demagnetization is not reached.