FEM Modeling of Surface Losses in Accordance with Their Nature

The paper presents a new method to estimate the surface losses caused by the non-sinusoidal spatial distribution of the magnetic field, moving over the surface of laminated rotor cores. The rotating magnetic field present in the air gap of ac electrical machines causes additional losses, which are very important during motor design, in particular for high-speed applications. A simplified - but still consistent in its nature finite element method model has been developed to simulate the mechanism of the surface loss generation. The obtained results are critically discussed and compared with those reported in other research works.

Automated summary

The paper presents a new method to estimate surface losses caused by non-sinusoidal spatial distribution of the magnetic field on laminated rotor cores. The rotating magnetic field in the air gap of AC electrical machines causes additional losses, especially in high-speed applications. A simplified finite element method model was developed to simulate the mechanism of surface loss generation, with results critically discussed and compared with other research works.