新型强迫风冷散热结构在高功率密度外转子表贴式PMSM上应用分析  

Application Analysis of Novel Forced Air-Cooled in Outer Rotor Surface-mounted PMSM with High Power Density

作　　者：于占洋 胡旭阳 李岩[2] 井永腾[2] 王瑾[2] Yu Zhanyang;Hu Xuyang;Li Yan;Jing Yongteng;Wang Jin(School of Electrical Engineering Shenyang University of Technology,Shenyang 110870 China;National Engineering Research Center for REPM Electrical Machines,Shenyang University of Technology Shenyang 110870 China)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870 [2]国家稀土永磁电机工程技术研究中心(沈阳工业大学),沈阳110870

出　　处：《电工技术学报》2023年第24期6668-6678,共11页Transactions of China Electrotechnical Society

基　　金：辽宁省教育厅高等学校基本科研项目“基于热管技术的高功率密度PMSM温度场建模与传热特性研究”资助。

摘　　要：全电动飞机用高功率密度外转子永磁同步电机的损耗主要集中在定子铁心和绕组上,导致传统的强迫风冷方式难以将热量通过机壳、端盖传递到外界。为此,首先,该文提出一种基于热管技术的高性能冷却系统,此冷却系统充分利用热管高导热性能,将热管一端插入定子铁心轭部,另一端连接相应的冷却结构进行散热,并综合对比分析了三种不同散热器结构的散热能力。在此基础上,搭建实验测试平台,对所提出冷却系统的散热能力和平均散热系数进行实验测试。其次,为了提高电机的功率密度,采用单齿铁心绕线工艺,降低了绕组铜耗和质量,并对单齿绕线方式下直流铜耗进行解析建模。最后,设计、制作一台22极24槽全电的飞机用外转子表贴式永磁同步电机(SPMSM),测试样机在不同飞行工况下的温升分布情况,验证了所提出冷却系统的有效性。Implementing ten key areas of Made in China 2025 has provided a broad platform has been provided to develop all-electric aircraft(AEA).At present,some countries and research institutions have developed AEA.However,only a few successful AEAs are published at home and abroad,and studies about driving motors for AEA are rarely published.Therefore,the research on driving motors with high power density and torque density is important for developing AEA.For this topic,an outer rotor surface-mounted permanent magnet synchronous motor(SPMSM)for two-seat AEA is taken as the research object,and its loss distribution,cooling system design,and temperature rise characteristics are discussed.A driving motor for AEA requires high power density and high torque density,resulting in an extreme state of magnetic load and electrical load.Therefore,it is important to analyze the accurate calculation of loss and the technology of loss suppression.Firstly,to reduce core loss,B35A230 self-bonded silicon steel sheet is used as stator and rotor core,the magnetic property of B35A230 is tested by the method of Epstein frame and ring specimen,and the ratio-loss curves at different frequencies and different flux densities are measured.According to the experimental results of the ring specimen method,a loss model is adopted to improve accuracy.The processing factor is considered,and magnetization modes and harmonic magnetic field are alternated and rotated.Secondly,the influences of slot opening width and axial segment of PM on eddy current loss are analyzed to reduce loss.Finally,to shorten the length of the winding end and reduce copper loss and weight,the processing method of a single-tooth core is adopted to manufacture the prototype,and the analytical model of DC copper loss is built.The loss of outer rotor SPMSM for AEA with high power density is mainly distributed on stator core and winding coils.Thus,traditional forced air-cooled cannot effectively transfer heat to the outside world through the casing and end cover.Due to the limitatio

关 键 词：热管 高功率密度 强迫风冷 外转子表贴式永磁同步电机 

分 类 号：TM315[电气工程—电机]