Analysis of Load Loss Characteristics of FeCo Alloy High Speed Permanent Magnet Motor

In order to study the change law of loss and efficiency of high-speed permanent magnet motor (HSPMM) under load after using FeCo_B800 alloy material instead of silicon steel sheet DW310_35 material to make iron core, two FeCo_B800 stator materials with the same structure and size parameters were developed. HSPMM and HSPMM of silicon steel DW310_35 stator material. The loss and efficiency characteristics of the two motors under the same operating conditions were tested by the experimental method, and the losses of the two motors at different load rates were compared and analyzed by means of the finite element method. The research results show that at light load, the FeCo_B800 motor stator core loss is lower than the DW310_35 silicon steel sheet motor, and the efficiency advantage is very obvious; however, with the increase of the load rate, the FeCo_B800 motor stator core is seriously saturated, resulting in the distortion of the winding magnetomotive force waveform. The loss caused by the harmonics of the winding magnetomotive force is higher than that of the DW310_35 silicon steel sheet motor, and the efficiency advantage of the FeCo-B800 motor gradually decreases with the increase of the load rate.