永磁同步牵引电机温度场研究

发布时间：2018-04-05 08:23

本文选题：永磁牵引电机　切入点：温度场　出处：《哈尔滨理工大学》2015年硕士论文

【摘要】：随着高速铁路的迅速发展及高性能永磁材料的出现，永磁牵引电机在轨道交通领域中的研究与应用日益广泛。永磁牵引电机拥有高效率、高功率因数、体积小、噪声低等传统异步牵引电机所无法比拟的优点，使得其在机车牵引中的应用具有很好的发展前景。然而由于永磁牵引电机的体积小、功率密度高，电机的安装空间又有限，如果电机内的热量不能及时散出，永磁牵引电机将会有失磁的风险。因此，对永磁同步牵引电机的温度场分布进行深入的研究显得尤为重要。本文以一台600kW永磁同步牵引电机为例，基于流体力学和传热学理论，并结合电机实际通风结构，建立了流体场和温度场耦合求解模型，，采用有限体积法对电机的流体、温度耦合场进行了仿真计算，得到了电机内部的温升分布，对电机定子铁心、定子绕组、转子铁心及永磁体的温升分布规律进行了全面深入的分析，确定了电机内的最高温升位置，并将温升计算结果与实测值进行了比较，验证了计算结果的准确性。在此基础上，对影响电机温升分布的敏感性因素进行了分析，为永磁牵引电机的设计提供理论参考。为了进一步降低电机的温升，文中还对永磁牵引电机的通风散热结构进行了优化设计，将不同方案下电机的流体场和温度场进行了仿真计算，并将在不同方案下得到的计算结果进行了对比分析，以寻求最优通风散热设计方案。
[Abstract]:With the rapid development of high speed railway and the appearance of high performance permanent magnet materials, the research and application of permanent magnet traction motor in the field of rail transit is becoming more and more extensive.Permanent magnet traction motor has many advantages, such as high efficiency, high power factor, small volume, low noise and so on.However, due to the small size, high power density and limited installation space of the permanent magnet traction motor, if the heat in the motor can not be dissipated in time, the permanent magnet traction motor will lose its magnetic field.Therefore, it is very important to study the temperature field distribution of permanent magnet synchronous traction motor (PMSM).Taking a 600kW permanent magnet synchronous traction motor as an example, based on the theory of fluid mechanics and heat transfer, and combining with the actual ventilation structure of the motor, a coupled solution model of fluid field and temperature field is established. The finite volume method is used to solve the fluid of the motor.The temperature coupling field is simulated and the temperature rise distribution inside the motor is obtained. The temperature rise distribution of the stator core, stator winding, rotor core and permanent magnet is analyzed thoroughly and deeply.The maximum temperature rise position in the motor is determined, and the accuracy of the calculated results is verified by comparing the calculated results with the measured values.On this basis, the sensitivity factors affecting the temperature rise distribution of the motor are analyzed, which provides a theoretical reference for the design of the permanent magnet traction motor.In order to further reduce the temperature rise of the motor, the ventilation and heat dissipation structure of the permanent magnet traction motor is optimized, and the fluid and temperature fields of the motor under different schemes are simulated and calculated.The results obtained under different schemes are compared and analyzed in order to find the optimal design scheme of ventilation and heat dissipation.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM922.71

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