Influence factor analysis of disc-type AC permanent magnet synchronous motor temperature rise

First of all, according to electromagnetic parameters and thermal physical parameters of 510 kW disk-type motor, the 3D liquid-solid coupling model is built in this paper. The temperature distribution of motor heating parts is analyzed under the rating condition, and then the temperature rise test of prototype is performed. For the case that the temperature of motor is relatively high, affecting factors of temperature rise test are studied from the perspective of temperature reduction actively and passively. On the respect of temperature reduction actively, a 3D axial flux PMSM model is put forward. Changing trends of iron core loss is analyzed under the no-load and load conditions, which using different brands of silicon steel sheet based on the theoretical model of iron core loss and electromagnetic simulation model. On the respect of temperature reduction passively, the influence factors on the highest temperature of stator and rotor are analyzed, which include inlet velocity, end capmaterial, and different load based on the 3D liquid-solid coupling model. Finally, the convective heat transfer coefficient and pressure loss between inlet and outlet are studied, which change with different water channel type and inlet velocity. Through above analysis of influential factor on temperature rise, the theoretical foundation is laid for improving the thermal management of disk-type motor.