【摘要】 高速永磁屏蔽电机体积小、转速高、功率密度大，在高性能领域的应用愈加广泛。针对高功率密度高速永磁屏蔽电机介质摩擦损耗问题，基于流体力学理论，采用有限体积法，以一台40 000 r/min、35 kW的高速永磁屏蔽电机为例，对其进行摩擦损耗的分析与计算，分别研究了转子转速、转子表面粗糙度和入口介质流速对摩擦损耗的影响。分析结果表明，转速对摩擦损耗的影响呈指数关系，表面粗糙度会增加转子表面摩擦系数从而加大损耗，介质入口流速的提升会导致转子表面流态更加复杂，进一步影响摩擦损耗的变化。更多还原

【Abstract】 High-speed permanent magnet shielded motors are characterized by their small size, high speed and high power density, making them increasingly popular in high-performance domain. To address the issue of medium friction loss in high-power density high-speed permanent magnet shielded motors, a fluid dynamics-based approach was adopted. Used the finite volume method, a 40 000 r/min, 35 kW high-speed permanent magnet shielded motor was analyzed for friction loss. The study investigated the effects of rotor speed, rotor surface roughness, and the inlet medium velocity on friction loss. The results showed that the rotor speed had an exponential relationship with friction loss, surface roughness increased the rotor surface friction coefficient, thereby amplified the loss, and an increase in the inlet medium velocity leaded to a more complex flow state on the rotor surface, further influenced the variation in friction loss.更多还原