超导磁悬浮转子过载能力分析  

Analysis of overload capacity of a superconducting magnetic suspension rotor

作　　者：王浩[1,2,3] 王秋良 胡新宁[1,2,3] 崔春艳 苏华骏[1,2,3] 何忠名 Wang Hao;Wang Qiuliang;Hu Xinning;Cui Chunyan;Su Huajun;He Zhongming(Key Laboratory of Applied Superconductivity,Chinese Academy of Sciences,Beijing 100190,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院应用超导重点实验室,北京100190 [2]中国科学院电工研究所,北京100190 [3]中国科学院大学,北京100049

出　　处：《低温与超导》2018年第9期1-5,共5页Cryogenics and Superconductivity

基　　金：国家自然科学基金(41527802;51477166;51477167)资助

摘　　要：基于超导体迈斯纳效应的超导磁悬浮技术是一种无接触的支承方式。当超导转子旋转时,由于无摩擦阻力,转子可以达到很高的转速,这使得超导转子装置在角位移和角速度的测量领域有很大的应用潜力。当载体在加速或减速的过程中,固结于载体的超导转子就存在着过载的风险,因此有必要对其支承系统的过载能力进行分析。利用Ansoft软件对超导转子磁支承系统进行了建模,首先分析了转子悬浮于球腔中心位置时上、下支承电流的对应关系,接着分析了大、中、小三组支承电流下转子所能承受的最大过载加速度。结果表明,超导转子的支承系统类似一个"弹簧结构",对于中、小支承电流,电流值的大小对过载能力的影响较小,超导转子的过载能力主要由制造转子所用铌材料的临界磁场决定。Superconducting magnetic suspension is a non - contact bearing technology based on the Meissner effect of the superconductor. When the superconducting rotor rotates, due to frictionless resistance, the rotor can achieve a very high speed. This makes the superconducting rotor have a great potential in the field of angular displacement and angular velocity measurement. The superconducting rotor, which is fixed to the carrier, will be at risk of overload when the carrier is accelerating or decelerating. Therefore, it is necessary to analyze the overload capacity of the rotor. System modeling was carried out by ANSOFT. Relationship between the up and down bearing currents was analyzed when the rotor was suspended in the center of the rotor housing. Then, the maximum overload accelerations that the rotor can withstand with large, middle and small bearing currents were analyzed respectively. The results show that the supporting system of the rotor is similar to a ＂spring＂. Maximum overload capacity of the support system is little affected by the size of the support current, and it was mainly determined by the critical magnetic field of niobium used for manufacturing the rotor.

关 键 词：超导磁悬浮转子 过载加速度 临界磁场 

分 类 号：TM26[一般工业技术—材料科学与工程]