关键词: 单畴GdBCO超导体/
空心圆柱形永磁体/
磁悬浮力
English Abstract
Effect of inner diameter of hollow cylindrical permanent magnet on levitation force of single domain GdBCO bulk superconductor
Ma Jun1,Chen Zhang-Long1,
Xian Tao1,
Wei Xue-Gang1,
Yang Wan-Min2,
Chen Sen-Lin2,
Li Jia-Wei2
1.College of Physics and Electronic Information Engineering, Qinghai Normal University, Xining 810008, China;
2.College of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
Fund Project:Project supported the Natural Science Foundation of Qinghai Province, China (Grant No. 2016-ZJ-915), the National Natural Science Foundation of China (Grant Nos. 51167016, 51342001), 135 High-Level Personnel in Qinghai Province, and Central Colleges of Basic Scientific Research Funded Special Fund Operating Expenses, China (Grant No. GK201305014).Received Date:09 November 2017
Accepted Date:26 January 2018
Published Online:05 April 2018
Abstract:The influence of inner diameter of hollow cylindrical permanent magnet on the levitation force of single domain GdBCO bulk superconductor is investigated by measuring the levitation force between the hollow cylindrical permanent magnet and the single domain GdBCO bulk superconductor. The results show that the levitation force is closely related to the inner diameter of the hollow cylindrical permanent magnet when the inner diameter (d) increases from 0 mm to 26 mm (minimum measuring gap distance Z=2 mm), and all the superconducting magnetic levitation force curve shows magnetic hysteresis phenomenon. With the increase of the inner diameter of the hollow cylindrical permanent magnet, the levitation force at a minimum distance decreases gradually from 14.8 N at d=0 mm to -0.1 N at d=26 mm. The levitation force at the minimum gap distance is negative when d ≥ 20 mm. When 0 mm ≤ dd ≥ 5 mm. The larger magnetic field strength of the superconductor can be obtained, and the levitation force can be effectively improved by the scientific and reasonable designing of the permanent magnet structure. The results have certain guiding significance for designing and optimizing the magnetic suspension bearing system, ring track and superconductor.
Keywords: single domain GdBCO bulk/
hollow cylindrical permanent magnet/
levitation force
