高速永磁电机转子过盈方式对转子应力的影响

doi:10.19595/j.cnki.1000-6753.tces.221036

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Abstract In the design of a high-speed permanent magnet machine, the calculation and verification of rotor stress are very important, especially the stress of a permanent magnet. The existing research mainly focuses on the influence of shrink-fitting magnitude on rotor stress, but ignores the influence of shrink-fitting modes. The shrink fitting between the sleeve and the permanent magnet greatly impacts the rotor stress. Limited by the electromagnetic power, the stress margin left to the permanent magnet or sleeve is limited to improve the material utilization. If the difference of rotor stress under various shrink fitting modes is not considered in the design, the safety of rotor strength will be greatly reduced when the operating point of the machine is near the limit value of the material stress, which may even lead to the failure of the design of high-speed permanent magnet machine. Therefore, the influence of shrink-fitting modes on the rotor stress of high-speed permanent magnet machines should be addressed, and more attention must be paid to it when calculating the rotor stress. This paper studies the influence of shrink-fitting modes on the rotor stress of a high-speed permanent magnet machine.
Firstly, the stress field mathematical model of the unified geometric model of each rotor part is established in two-dimensional polar coordinates. The radial and circumferential stresses of the shaft, permanent magnet, and sleeve can be solved under different boundary conditions. It can be concluded that the rotor stress is the sum of the rotational component and the surface pressure component. The tensile stress caused by rotation can be offset by the pressure from the sleeve, and the degree of offset is determined by the pressure applied by the sleeve. Therefore, to calculate the rotor stress accurately, it is necessary to accurately calculate the stress caused by rotation and obtain the pressure applied by the sleeve. It is easy to calculate the stress caused by rotation, while the stress offset by the sleeve pressure is more complicated due to the shrink fitting, so it is necessary to study the influence of shrink-fitting modes on rotor stress. Then, based on the stress field mathematical model, the analytical calculation method of rotor stress under different shrink-fitting modes is further obtained, and the influence of different shrink-fitting modes on rotor stress is analyzed. Finally, taking a high-speed permanent magnet machine with rated power of 50 kW and rated speed of 40 000 r/min as an example, the rotor stress under different shrink-fitting modes is calculated by the finite element method. When the magnitude of shrink fitting relative to the sleeve thickness cannot be ignored, different shrink-fitting modes will significantly affect the rotor stress, especially the core component permanent magnet. Therefore, it is necessary to select a better mode by comparing shrink-fitting modes to reduce rotor stress and improve the safety and reliability of the machine. This paper provides theoretical guidance for the design of shrink-fitting modes of high-speed permanent magnet machine rotors.

Key words： High speed permanent magnet machine stress shrink fitting mathematical model

Received: 06 June 2022

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TM351

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	Yang Jiangtao
	Wang Zhenyu
	Feng Yaojing
	Huang Shoudao

Cite this article:

Yang Jiangtao,Wang Zhenyu,Feng Yaojing等. Influence of Shrink Fitting Modes on Rotor Stress of High Speed Permanent Magnet Machine[J]. Transactions of China Electrotechnical Society, 2023, 38(16): 4263-4273.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.221036 OR https://dgjsxb.ces-transaction.com/EN/Y2023/V38/I16/4263

[1] 佟文明, 侯明君, 孙鲁, 等. 基于精确子域模型的带护套转子高速永磁电机转子涡流损耗解析方法[J]. 电工技术学报, 2022, 37(16): 4047-4059.
Tong Wenming, Hou Mingjun, Sun Lu, et al.Analytical method of rotor eddy current loss for high-speed surface-mounted permanent magnet motor with rotor retaining sleeve[J]. Transactions of China Electrotechnical Society, 2022, 37(16): 4047-4059.
[2] 王晓琳, 刘思豪, 顾聪. 基于自适应基准锁相环的高速永磁电机转子位置误差全补偿方法[J]. 电工技术学报, 2021, 36(20): 4308-4317.
Wang Xiaolin, Liu Sihao, Gu Cong.A rotor position error compensation algorithm for high-speed per- manent magnet motor based on phase-locked loop with adaptive reference[J]. Transactions of China Electrotechnical Society, 2021, 36(20): 4308-4317.
[3] 戴睿, 张岳, 王惠军, 等. 基于多物理场近似模型的高速永磁电机多目标优化设计[J]. 电工技术学报, 2022, 37(21): 5414-5423.
Dai Rui, Zhang Yue, Wang Huijun, et al.Multi- objective optimization design of high-speed per- manent magnet machine based on multi-physics approximate model[J]. Transactions of China Elec- trotechnical Society, 2022, 37(21): 5414-5423.
[4] 张丹, 姜建国. 高速磁悬浮永磁电机三电平无速度传感器控制[J]. 电工技术学报, 2022, 37(22): 5808-5816.
Zhang Dan, Jiang Jianguo.Three-level sensorless control of high speed maglev permanent magnet motor[J]. Transactions of China Electrotechnical Society, 2022, 37(22): 5808-5816.
[5] 程文杰, 耿海鹏, 冯圣, 等. 高速永磁同步电机转子强度分析[J]. 中国电机工程学报, 2012, 32(27): 36-41.
Cheng Wenjie, Geng Haipeng, Feng Sheng, et al.Rotor strength analysis of high-speed permanent magnet synchronous motors[J]. Proceedings of the CSEE, 2012, 32(27): 36-41.
[6] Yu Wenfei, Liu Kai, Hua Wei, et al.A new high- speed dual-stator flux switching permanent magnet machine with distributed winding[J]. IEEE Transa- ctions on Magnetics, 2022, 58(2): 1-6.
[7] Liu Lin, Guo Youguang, Lei Gang, et al.Iron loss calculation for high-speed permanent magnet machines considering rotating magnetic field and thermal effects[J]. IEEE Transactions on Applied Superconductivity, 2021, 31(8): 1-5.
[8] 赵士豪, 陈进华, 张驰, 等. 不均匀气隙表贴式永磁同步电机磁场解析计算[J]. 电工技术学报, 2022, 37(14): 3502-3513.
Zhao Shihao, Chen Jinhua, Zhang Chi, et al.Analytical calculation of magnetic field of permanent magnet synchronous motor with uneven air gap structure[J]. Transactions of China Electrotechnical Society, 2022, 37(14): 3502-3513.
[9] 董剑宁, 黄允凯, 金龙, 等. 高速永磁电机设计与分析技术综述[J]. 中国电机工程学报, 2014, 34(27): 4640-4653.
Dong Jianning, Huang Yunkai, Jin Long, et al.Review on high speed permanent magnet machines including design and analysis technologies[J]. Proceedings of the CSEE, 2014, 34(27): 4640-4653.
[10] 张凤阁, 杜光辉, 王天煜, 等. 高速永磁电机转子不同保护措施的强度分析[J]. 中国电机工程学报, 2013, 33(增刊1): 195-202.
Zhang Fengge, Du Guanghui, Wang Tianyu, et al.Rotor strength analysis of high-speed permanent magnet under different protection measures[J]. Proceedings of the CSEE, 2013, 33(S1): 195-202.
[11] 张凤阁, 杜光辉, 王天煜, 等. 高速电机发展与设计综述[J]. 电工技术学报, 2016, 31(7): 1-18.
Zhang Fengge, Du Guanghui, Wang Tianyu, et al.Review on development and design of high speed machines[J]. Transactions of China Electrotechnical Society, 2016, 31(7): 1-18.
[12] 张超, 朱建国, 韩雪岩. 高速表贴式永磁电机转子强度分析[J]. 中国电机工程学报, 2016, 36(17): 4719-4727.
Zhang Chao, Zhu Jianguo, Han Xueyan.Strength analysis of high-speed surface-mounted permanent magnet motor rotor[J]. Proceedings of the CSEE, 2016, 36(17): 4719-4727.
[13] Uzhegov N, Kurvinen E, Nerg J, et al.Multi- disciplinary design process of a 6-slot 2-pole high- speed permanent-magnet synchronous machine[J]. IEEE Transactions on Industrial Electronics, 2016, 63(2): 784-795.
[14] Zhang Fengge, Du Guanghui, Wang Tianyu, et al.Rotor retaining sleeve design for a 1.12-MW high-speed PM machine[J]. IEEE Transactions on Industry Applications, 2015, 51(5): 3675-3685.
[15] 王继强, 王凤翔, 鲍文博, 等. 高速永磁电机转子设计与强度分析[J]. 中国电机工程学报, 2005, 25(15): 140-145.
Wang Jiqiang, Wang Fengxiang, Bao Wenbo, et al.Rotor design and strength analysis of high speed permanent magnet machine[J]. Proceedings of the CSEE, 2005, 25(15): 140-145.
[16] Du Guanghui, Xu Wei, Zhu Jianguo, et al.Rotor stress analysis for high-speed permanent magnet machines considering assembly gap and temperature gradient[J]. IEEE Transactions on Energy Conversion, 2019, 34(4): 2276-2285.
[17] 沈建新, 秦雪飞, 尧磊, 等. 高速永磁电机转子强度分析与护套设计[J]. 中国电机工程学报, 2022, 42(6): 2334-2345, 26.
Shen Jianxin, Qin Xuefei, Yao Lei, et al.Strength analysis and sheath design of high-speed permanent magnet motor rotor[J]. Proceedings of the CSEE, 2022, 42(6): 2334-2345, 26.
[18] Shen Jianxin, Hao He, Jin Mengjia, et al.Reduction of rotor eddy current loss in high speed PM brushless machines by grooving retaining sleeve[J]. IEEE Transactions on Magnetics, 2013, 49(7): 3973-3976.
[19] Fang Haiyang, Li Dawei, Qu Ronghai, et al.Rotor design and eddy-current loss suppression for high- speed machines with a solid-PM rotor[J]. IEEE Transactions on Industry Applications, 2019, 55(1): 448-457.
[20] 王天煜, 温福强, 张凤阁, 等. 兆瓦级高速永磁电机转子多场耦合强度分析[J]. 电工技术学报, 2018, 33(19): 4508-4516.
Wang Tianyu, Wen Fuqiang, Zhang Fengge, et al.Analysis of multi-field coupling strength for MW high-speed permanent magnet machine[J]. Transa- ctions of China Electrotechnical Society, 2018, 33(19): 4508-4516.
[21] 刘威, 陈进华, 张驰, 等. 考虑轴间填充物的高速永磁电机转子强度分析[J]. 电工技术学报, 2018, 33(5): 1024-1031.
Liu Wei, Chen Jinhua, Zhang Chi, et al.Strength analysis of high speed permanent magnet machine rotor with inter-shaft filling[J]. Transactions of China Electrotechnical Society, 2018, 33(5): 1024-1031.
[22] 万援, 崔淑梅, 吴绍朋, 等. 扁平大功率高速永磁同步电机的护套设计及其强度优化[J]. 电工技术学报, 2018, 33(1): 55-63.
Wan Yuan, Cui Shumei, Wu Shaopeng, et al.Sheath design and strength optimization of flat high-power high-speed permanent magnet synchronous motor[J]. Transactions of China Electrotechnical Society, 2018, 33(1): 55-63.
[23] 钱伟长. 电机设计强度计算的理论基础[M]. 合肥: 安徽科学技术出版社, 1992.
[24] 吴家龙. 弹性力学[M]. 北京: 高等教育出版社, 2001.
[25] 陈亮亮. 磁悬浮高速飞轮储能系统永磁电机转子强度分析及转子振动控制[D]. 杭州: 浙江大学, 2019.
[26] Bernard L, Daniel L.Effect of stress on magnetic hysteresis losses in a switched reluctance motor: application to stator and rotor shrink fitting[J]. IEEE Transactions on Magnetics, 2015, 51(9): 1-13.