轴向磁通永磁电机混合冷却结构设计与分析

Hybrid Cooling Structure Design and Analysis of Axial Flux Permanent Magnet Motor

针对轴向磁通永磁电机损耗大和散热困难的问题,提出了风冷结构和混合冷却结构,其中混合冷却结构由端盖风冷结构和定子水冷结构组成。建立了电机的三维模型,采用流固耦合法对电机进行仿真分析,通过对比两种冷却结构的冷却效果,选择了混合冷却结构作为电机的冷却系统。通过仿真分析了流速对电机温升的影响,并根据仿真结果确定了混合冷却结构最佳的入口风速以及水速,证明了混合冷却结构的有效性,为轴向磁通永磁电机的冷却系统设计提供了一定的参考。

In order to solve the problems of large loss and difficult heat dissipation of axial flux permanent magnet motor,air-cooled structure and hybrid cooling structure were proposed.The hybrid cooling structure consisted of end-cap air-cooled structure and stator water-cooled structure.The three-dimensional model of the motor was established,and the fluid-solid coupling method was used to simulate the motor.By comparing the cooling effect of two kinds of cooling structures,the hybrid cooling structure was selected as the cooling system of the motor.The effect of flow velocity on the temperature rise of the motor was analyzed by simulation,and the optimal inlet wind speed and water velocity of the hybrid cooling structure were determined according to the simulation results,which proved the effectiveness of the hybrid cooling structure,and provided a certain reference for the cooling system design of the axial flux permanent magnet motor.