磁悬浮永磁发电机用被动磁轴承磁力及刚度特性研究  

Research on Magnetic Force and Stiffness Characteristics of Passive Magnetic Bearings for Maglev Permanent Magnet Generators

作　　者：温海平 王磊 姚利辉 郑少杰 米振宝 WEN Haiping;WANG Lei;YAO Lihui;ZHENG Shaojie;MI Zhenbao(Dunshi Magnetic Energy Technology Co.,Ltd.,Shijiazhuang 050800,China;Hebei Provincial High-speed Flywheel Energy Storage and Energy-saving Technology Key Laboratory,Shijiazhuang 050800,China)

机构地区：[1]盾石磁能科技有限责任公司,石家庄050800 [2]河北省高速飞轮储能与节能技术重点实验室,石家庄050800

出　　处：《微特电机》2024年第9期12-16,22,共6页Small & Special Electrical Machines

基　　金：石家庄市科技计划项目(221240261A)。

摘　　要：磁悬浮高速永磁发电机是超低温余热发电装置的核心部件,其轴系结构及参数关乎发电机的性能。以被动永磁轴承为研究对象,简单介绍了余热发电机轴系和被动磁轴承的结构形式、被动磁轴承悬浮原理,建立了被动永磁轴承的磁力计算模型以及刚度计算模型,通过正交实验获取该被动磁轴承的全局最优设计参数,即全局最优的磁极径向厚度d为7.5 mm,磁极对节距λ为15 mm,间隙中心半径R为100 mm,轴向长度L为150 mm,径向间隙g为3 mm,径向刚度K为3000 N/mm。上述轴系结构及参数应用于某余热发电系统,实际运行结果表明,故障停机率降低了52.94%,转子额定工况下位移幅值减少0.09 mm,被动磁轴承温度降低了10℃。The maglev high-speed permanent magnet generator is the core component of the ultra-low temperature waste heat power generation device,and its bearing system structure and parameters are related to the generator's performance.Taking the passive permanent magnet bearing as the research object,the structural form of the bearing system and passive magnetic bearings of the waste heat generator and the suspension principle of the passive magnetic bearings were briefly introduced.A magnetic force calculation model and a stiffness calculation model of passive permanent magnet bearings were established.The global optimum design parameters of the passive magnetic bearing were obtained through orthogonal experiments,namely,the global optimum radial thickness d of the magnetic poles was 7.5 mm,the pitch of the magnetic poles was 15 mm,the center radius R of the gap was 100 mm,the axial length L was 150 mm,the radial gap g was 3 mm,the radial rigidity K was 3000 N/mm.The above bearing system structure and parameters are applied to a waste heat power generation system.The actual operation results showed that the fault shutdown rate was reduced by 52.94%,the displacement of rotor under rated operation was reduced by 0.09 mm,and the temperature of the passive magnetic bearing was reduced by 10℃.

关 键 词：磁悬浮永磁发电机 被动永磁轴承 磁力 优化设计 

分 类 号：TM355[电气工程—电机]