潜液式液化天然气泵用低温永磁同步电机研究现状综述  

Review on Cryogenic Permanent Magnet Synchronous Motor for Submersible Liquid Natural Gas Pump

作　　者：张书宽 王发琛 曲荣海[2] 朱景伟 刘光伟[3] Zhang Shukuan;Wang Fachen;Qu Ronghai;Zhu Jingwei;Liu Guangwei(College of Marine Electrical Engineering Dalian Maritime University,Dalian,116026,China;School of Electrical and Electronic Engineering Huazhong University of Science and Technology,Wuhan,430074 C,hina;Key Laboratory of Special Machine and High Voltage Apparatus Ministry of Education Shenyang University of Technology,Shenyang,110870,China)

机构地区：[1]大连海事大学船舶电气工程学院,大连116026 [2]华中科技大学电气与电子工程学院,武汉430074 [3]沈阳工业大学特种电机与高压电器教育部重点实验室,沈阳110870

出　　处：《电工技术学报》2024年第22期6998-7018,共21页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重点项目(52337001);面上项目(52377037);特种电机与高压电器教育部重点实验室(沈阳工业大学)开放课题(KFKT202209)资助。

摘　　要：低温永磁同步电机具有高效率、高功率密度和运行稳定的优点,正在逐步替代低温感应电机,成为液化天然气泵用低温电机未来的发展趋势,但仍有一些关键技术问题有待解决。该文首先详细阐述了低温环境下永磁同步电机关键材料的电磁特性和机械特性的变化规律,明确了不同材料的选取原则。在此基础上,重点总结了低温永磁同步电机的设计方法、拓扑结构、多物理场耦合分析及控制策略等关键技术。然后,介绍了现有低温电机的制造工艺与测试方法,指出当前低温电机测试所面临的挑战和不足。最后,探讨了低温永磁同步电机领域亟待解决的关键技术问题,并对低温永磁同步电机的研究方向和发展趋势进行了展望。A new global energy structure with oil,coal,natural gas,and new energy has developed.Natural gas is mainly stored and transported as liquefied natural gas(LNG).The submersible LNG pump plays an important role in the transportation and use of LNG,and the cryogenic permanent magnet synchronous motor(CPMSM)is the core driving equipment of the submersible LNG pump.This paper summarizes the key technical issues involved in CPMSM and provides a reference for future research and application.Firstly,the electromagnetic and physical characteristics of core materials,permanent magnet materials,insulation materials,and bearings used in CPMSM are reviewed in detail,clarifying the principles for selecting different materials.The stator and rotor cores can be made of oriented silicon steel sheets with high silicon content or amorphous alloy material to ensure the efficient and stable operation of CPMSM.The permanent magnet should use samarium cobalt permanent magnet material;multi-layer composite insulation material should be used for winding insulation;bearings can be low-temperature hybrid bearings,low-temperature all-ceramic bearings,and magnetic bearings.Secondly,according to the changes in the service characteristics of CPMSM materials in a cryogenic environment,the design methods of CPMSM based on multi-physics coupling analysis and analogy method are introduced.Compared to the conventional PMSM,the stator and rotor diameters of CPMSM can be reduced by 14.3%and 10.0%,respectively.In addition,from the perspective of reducing the losses of CPMSM and ensuring the structural strength of the motor,the stator and rotor topology structures of CPMSM are analyzed.Thirdly,the research on multi-physical field coupling analysis of CPMSM in recent years is summarized,focusing on the fluid-thermal field coupling analysis and stress distribution law of CPMSM under a cryogenic environment.Based on the characteristics of LNG flowing through CPMSM’s air gap,the effects of motor speed,LNG flow rate,and rotor surface roughness on rotor fr

关 键 词：低温永磁同步电机 低温材料特性 设计方法 控制策略 低温测试 

分 类 号：TM351[电气工程—电机]