Title :
Calculation of magnetic levitation/suspension force of single grained Y-Ba-Cu-O superconductors
Author :
Chen, In-Gann ; Hsu, Jen-Chou ; Wu, Maw-Kuen
Author_Institution :
Dept. of Mater. Sci. & Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
fDate :
3/1/2001 12:00:00 AM
Abstract :
Top-seeded single-grained YBCO samples capable of levitating or suspending over kilograms of weight have been measured. However, the detailed relationship of the levitation or suspension forces between permanent magnets and single grained superconductor samples have not been fully studied, which is required to design a large scale system. In this report, an empirical method was used to calculate the levitation/suspension force. First, the magnetic field of the permanent magnet and the superconductor was measured by a Hall probe, which was mounted on a x-y stage. The corresponding circulating current, which results in the measured magnetic field distribution, could therefore be calculated. The force between these two sets of current distributions at various distances was calculated and compared with measured levitation/suspension forces. A good degree of agreement between the measured and calculated suspension/levitation force was achieved by this empirical method
Keywords :
barium compounds; copper compounds; current distribution; high-temperature superconductors; magnetic fields; magnetic forces; magnetic levitation; permanent magnets; superconducting magnets; yttrium compounds; HTSC magnets; Hall probe; YBaCuO; circulating current; current distributions; empirical method; magnetic field; magnetic field distribution; magnetic levitation force calculation; magnetic suspension force calculation; permanent magnets; single grained YBaCuO superconductors; Current measurement; Force measurement; Hall effect devices; Large-scale systems; Magnetic field measurement; Magnetic levitation; Permanent magnets; Superconducting magnets; Weight measurement; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on