中文摘要：

为了研究中小型高速永磁电机内部流体场与温度场分布规律,以一台15k W,30000r/min内置式高速永磁电机为例,基于计算流体力学和传热学理论建立了三维流体场与温度场的物理模型,应用有限体积法对流体场与温度场进行耦合计算,得到了电机内空气的流动特性与各部件的温度分布规律。针对高速电机运行时转子表面空气摩擦损耗大的问题,基于所建立的3D流体场模型,分析了转子转速、转子表面粗糙度对空气摩擦损耗的影响。研究结果表明,高速永磁电机端腔空气的流动性差,加之空气摩擦损耗的影响,导致转子温升较高,且转子转速、转子表面粗糙度对空气摩擦损耗有着重要影响。

英文摘要：

In order to study the distribution of fluid field and temperature field for the middle and small high speed permanent magnet motor（ HSPMM）,the physical model of fluid field and temperature field were established by taking a 15 k W,30000 r / min interior HSPMM as an example on the basis of computational fluid dynamics（ CFD） and heat transfer theory. The fluid field and temperature field were calculated using finite volume method,and the temperature distribution of each part and air flow characteristics in the motor were obtained. At the same time,according to the problem of high air friction loss caused by high speed rotation,the influence of rotor speed,surface roughness of rotor on air friction loss were analyzed based on the established 3D fluid field. The results show that the fluid flow characteristics of end region in HSPMM are poor and temperature of rotor is high,at the same time,rotor speed and surface roughness of rotor have an important influence on air friction loss.