Effective method to control the levitation force and levitation height in a superconducting maglev system  

作　　者：杨芃焘 杨万民 王妙 李佳伟 郭玉霞 

机构地区：[1]College of Physics and Information Technology, Shaanxi Normal University

出　　处：《Chinese Physics B》2015年第11期483-487,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51342001 and 50872079);the Key-grant Project of Chinese Ministry of Education(Grant No.311033);the Research Fund for the Doctoral Program of Higher Education of China(Grant No.20120202110003);the Innovation Team in Shaanxi Province,China(Grant No.2014KTC-18);the Fundamental Research Funds for the Central Universities,China(Grant Nos.GK201101001 and GK201305014);the Outstanding Doctoral Thesis Foundation Project of Shaanxi Normal University,China(Grant Nos.X2011YB08 and X2012YB05)

摘　　要：The influence of the width of the middle magnet in the permanent magnet guideways （PMGs） on the levitation force and the levitation height of single-domain yttrium barium copper oxide （YBCO） bulks has been investigated at 77 K under the zero field cooled （ZFC） state. It is found that the largest levitation force can be obtained in the system with the width of the middle magnet of the PMG equal to the size of the YBCO bulk when the gap between the YBCO bulk and PMG is small. Both larger levitation force and higher levitation height can be obtained in the system with the width of the middle magnet of the PMG larger than the size of the YBCO bulk. The stiffness of the levitation force between the PMG and the YBCO bulk is higher in the system with a smaller width of the middle magnet in the PMG. These results provide an effective way to control the levitation force and the levitation height for the superconducting maglev design and applications.The influence of the width of the middle magnet in the permanent magnet guideways （PMGs） on the levitation force and the levitation height of single-domain yttrium barium copper oxide （YBCO） bulks has been investigated at 77 K under the zero field cooled （ZFC） state. It is found that the largest levitation force can be obtained in the system with the width of the middle magnet of the PMG equal to the size of the YBCO bulk when the gap between the YBCO bulk and PMG is small. Both larger levitation force and higher levitation height can be obtained in the system with the width of the middle magnet of the PMG larger than the size of the YBCO bulk. The stiffness of the levitation force between the PMG and the YBCO bulk is higher in the system with a smaller width of the middle magnet in the PMG. These results provide an effective way to control the levitation force and the levitation height for the superconducting maglev design and applications.

关 键 词：permanent magnet guideway levitation force levitation height 

分 类 号：TM26[一般工业技术—材料科学与工程] TH133.3[电气工程—电工理论与新技术]