不同磁极拓扑结构的轴向磁通永磁同步电机传热的研究  

Heat transfer of axial flux permanent magnet motor with different magnetic pole topologies

作　　者：曹君慈[1] 周柏宇 李栋[1] 贾博 李伟力[1] CAO Jun-ci;ZHOU Bo-yu;LI Dong;JIA Bo;LI Wei-li(School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《电机与控制学报》2022年第5期26-36,共11页Electric Machines and Control

基　　金：国家重点研发计划项目(2019YFB1312200);中央高校研究基金(2019JBM060)。

摘　　要：针对轴向磁通永磁电机转子散热困难,使得永磁体容易温度过高的问题,研究考虑实际变频器供电,永磁体分段后的电密和涡流损耗。永磁体的分段方式分别为径向等长度、径向等体积和周向等体积分段。结合降低涡流损耗的效果和经济性综合分析,优选出永磁体最优的分段数。在优选分段数的基础上,考虑了永磁体之间粘接胶的影响,研究三种分段方式对电机温度场的影响,并与永磁体未分段的电机温度进行对比。最后制作了样机,进行效率和温升实验,验证了仿真计算的准确性。研究永磁体的分段,为进一步提高轴向磁通永磁电机的效率和功率密度,对电机设计初期选用更高的热负荷提供了参考依据。As to the heat dissipation difficulty of the rotor of axial flux permanent magnet(AFPM)motor,which makes the permanent magnets(PMs)easy to overheat,the electric density and eddy current loss of the segmented PMs considering the power supply of the actual frequency converter were studied.The segmenting modes of the PMs are radial equal length,radial equal volume and circumferential equal volume segment respectively.Combined with the effect of reducing eddy current loss and the comprehensive analysis of economy,the optimal number of segments of the PMs was optimized.On the basis of the optimal number of segments,considering the influence of adhesive between PMs,the influence of the three segmentation methods on the temperature field of AFPM motor was studied,and the temperature of AFPM motor was compared with that of the non-segmented PMs.Finally,a prototype was manufactured,and the efficiency and temperature rise experiments were carried out to verify accuracy of the simulation calculation.The study of the segment of PMs provides a reference for further improving the efficiency and power density of AFPM motor,and selecting higher heat density in motor design.

关 键 词：轴向磁通永磁电机 永磁体分段 涡流损耗 电机温升 温度场 

分 类 号：TM351[电气工程—电机]