基于H-法高温超导轴承悬浮特性的数值仿真研究  

NUMERICAL SIMULATION OF LEVITATION CHARACTERISTICS OF HTS BEARING BASED ON H-METHOD

作　　者：余志强[1] 吴秋瑞[1] 王明明[1] 邸建红[1] 

机构地区：[1]石家庄铁道大学,河北石家庄050043

出　　处：《低温物理学报》2016年第2期156-160,共5页Low Temperature Physical Letters

基　　金：河北省教育厅项目(批准号:ZC2016023)资助的课题

摘　　要：当高温超导体处于超导态,永磁体的部分磁力线进入到超导体内,由于磁通钉扎的作用,永磁体无需控制而稳定悬浮,这种悬浮具有无源自稳定的优良特性,利用这种特性的高温超导轴承应运而生.本文通过数值仿真的方法研究高温超导轴承的悬浮特性,建立了基于H-法的有限元模型,采用幂指数函数表示超导体的E-J特性.通过实验数据与仿真数据的对比验证了模型的正确性,讨论了误差产生的原因.数值仿真形象地显示了超导定子在永磁转子轴向运动过程中的电磁行为.When the high-temperature superconductor obtains the superconducting state, part of the magnetic flux lines enter into the superconductor and the permanent magnet can be levitated stably without control due to flux pinning effect. This levitation characteristic is passive self-stability, so it attracts broad attention. With the advantage, high-temperature superconducting （HTS） bearings have been successfully produced and applied in industry. In this paper, the levitation characteristics of a HTS bearing are studied by use of numerical simulation. The finite-element model based on H-method is set up. The power law model （PLM） is used to indicate the E-J behavior of a superconductor. The calculation results are compared with the experiment results, and the causes of error are analyzed. The electromagnetic behaviors of the superconductor magnet stator （SMS） are showed with the axial movement of the permanent magnet rotor （PMR）.

关 键 词：无源自稳定 悬浮特性 高温超导轴承 H-法 

分 类 号：O511.3[一般工业技术—材料科学与工程]