航空主发电机定子三维温度场的有限元分析

航空发电机的体积小,电磁负荷高,发热问题更显重要。温度场计算是研究发电机发热的主要手段。以B747发电机为研究对象,介绍了主发电机的发热热源、不同部件的导热系数和各散热面的散热系数,建立了航空主发电机定子三维温度场计算的数学模型,利用ANSYS有限元软件对温度场进行求解,得到定子温度场分布,找出电机最高发热部位,并分析了电机的相关因素变化对电机温度场分布的影响,得出了一些有益的结论,并用实例验证了结论的正确性。

Analysis of 3D Temperature Field of Aviation Main Generator Stator by Finite Element Method

The aviation generator is small in bulk and high in electromagnetic load,so the heating problem is especially serious.The calculation of the temperature field of generator is the main means analyzing the heat of generator.The paper take B747 AC generator as researched object,the source of heat,the thermal conductivity of generator components and the thermal coefficient of surface heat having introduced,the mathematical model of 3D temperature field of aviation main generator stator is derived.With the ANSYS software the temperature field is calculated,the distribution of temperature field is got and the hottest position of the generator is indicated.Then,some factors which influence the distribution of the temperature of stator are analyzed,and get some helpful conclusion.The accuracy of the conclusion is verified through an example.