双层复合护套高速永磁电机转子涡流损耗解析模型  

Analytical Modeling for Rotor Eddy Current Loss of High-Speed Surface-Mounted Permanent Magnet Motor with Double-Layer Compound Retaining Sleeve

作　　者：佟文明[1] 田野[1] 李晓健 贾建国[1] 李文东 Tong Wenming;Tian Ye;Li Xiaojian;Jia Jianguo;Li Wendong(National Engineering Research Center for Rare-Earth Permanent Magnet Motor Shenyang University of Technology Shenyang 110870,China;Shenyang Micro Control New Energy Technology Co.Ltd Shenyang 110178,China)

机构地区：[1]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 [2]沈阳微控新能源技术有限公司,沈阳110178

出　　处：《电工技术学报》2024年第14期4328-4340,共13页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(52222702);辽宁省“兴辽英才计划”(XLYC2007107);沈阳市创新人才工程(RC210067)资助项目。

摘　　要：在表贴式高速永磁电机中,双层复合护套可以有效抑制转子涡流损耗。目前,针对双层复合护套转子涡流损耗的研究主要采用有限元法,但该方法存在耗时、对薄护套网格剖分较困难等问题,因此该文基于精确子域法提出了一种考虑定子开槽、涡流反作用的双层复合护套高速永磁电机转子涡流损耗通用解析模型。该模型同时考虑了永磁磁场励磁和电枢磁场励磁,可以计算负载磁场作用下的双层复合护套转子涡流损耗。此外,该模型还可进一步拓展至多层复合护套转子涡流损耗计算。通过该解析模型研究了双层复合护套不同护套厚度配比、不同护套材料对转子涡流损耗的影响。最后,将解析计算结果与有限元及C型铁心实验结果进行对比,验证了该解析模型的有效性。High-speed permanent magnet motors(HSPMM)are widely used in high-speed machine tools,flywheel energy storage,and other fields due to their small size and high power density.For surface-mounted HSPMM,the rotor eddy current loss is large,and the heat dissipation conditions are poor,which may cause the rotor temperature to rise too high and increase the irreversible demagnetization risk of the permanent magnet.The double-layer composite retaining sleeve can effectively suppress the eddy current loss of the rotor,and the finite element method is mainly used to calculate its eddy current loss.This method needs a long calculation time.Therefore,based on the exact subdomain method,this paper proposes a general analytical model for rotor eddy current loss of double-layer composite retaining sleeve HSPMM considering stator slotting and eddy current reaction.Firstly,the whole field of the motor is divided into six sub-domains,such as permanent magnet,retaining sleeve,and air gap.The analytical model for rotor eddy current loss of HSPMM is established.Through the boundary conditions between each subdomain,the general expression of the magnetic field distribution in each subdomain is obtained.Then,the equations are solved by constructing the unknown coefficient equations,and the eddy current loss of each part of the rotor is calculated.Secondly,the air gap flux density and rotor eddy current loss of the selected prototype are calculated using finite element and analytical methods.The results show that the analytical method is almost consistent with the finite element method,and the double-layer composite retaining sleeve significantly suppresses the rotor eddy current loss of the surface-mounted HSPMM.The influence of different retaining sleeve thickness ratios and retaining sleeve materials on the eddy current loss is studied by the analytical model,and eddy current loss variations under different rotor structures are obtained.Finally,the C-type core experiment is established,and the calculation results of the eddy current

关 键 词：高速永磁电机 精确子域法 双层复合护套 涡流反作用 C型铁心实验 

分 类 号：TM351[电气工程—电机]