Lateral magnetic stiffness under different parameters in a high-temperature superconductor levitation system

作     者：Yong Yang Yun-Yi Wu 杨勇;吴云翼

作者机构：School of Mechano-Electronic EngineeringXidian UniversityXi'an 710071China China Three Gorges Science and Technology Research InstituteBeijing 100036China Physikalisches Institute BRWTH AachenAachen 52056Germany 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2021年第30卷第7期

页      面：515-525页

核心收录：

学科分类：080705[工学-制冷及低温工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(Grant No.11572232) 

主　　题：high-temperature superconductor magnetic levitation lateral stiffness lateral force 

摘      要：Magnetic stiffness determines the stability of a high-temperature superconductor(HTS)magnetic levitation *** quantitative properties of the physical and geometrical parameters that affect the stiffness of HTS levitation systems should be identified for improving the stiffness by some effective *** magnetic stiffness is directly related to the first-order derivative of the magnetic force with respect to the corresponding displacement,which indicates that the effects of the parameters on the stiffness should be different from the relationships between the forces and the same *** this paper,we study the influences of some physical and geometrical parameters,including the strength of the external magnetic field(B0)produced by a rectangular permanent magnet(PM),critical current density(Jc),the PM-to-HTS area ratio(α),and thickness ratio(β),on the lateral stiffness by using a numerical approach under zero-field cooling(ZFC)and field cooling(FC)*** the first and second passes of the PM,the lateral stiffness at most of lateral positions essentially increases with B0 increasing and decreases withβincreasing in ZFC and *** largest lateral stiffness at every lateral position is almost produced by the minimum value of Jc,which is obviously different from the lateral force–Jc ***α-dependent lateral stiffness changes with some parameters,which include the cooling conditions of the bulk HTS,lateral displacement,and movement history of the *** findings can provide some suggestions for improving the lateral stiffness of the HTS levitation system.