DocumentCode
1240036
Title
Effects of the field dependent Jc on the vertical levitation force between a superconductor and a magnet
Author
Li, Gang ; Qin, Meng Jun ; Liu, Hua Kun ; Dou, Shi Xue
Author_Institution
Dept. of Phys., Peking Univ., Beijing, China
Volume
13
Issue
2
fYear
2003
fDate
6/1/2003 12:00:00 AM
Firstpage
2142
Lastpage
2145
Abstract
The vertical levitation force between a superconductor disk (SC) and a permanent magnet disk (PM) has been calculated from first principles using different Jc(B) relationships of the magnetic field. Based upon the first principles, the current distribution inside the SC induced by the applied inhomogeneous magnetic field generated by the PM and the field profiles have been calculated with a power law E ∼ J relationship: E(J) = Ec(J/Jc(B))n. The levitation force is highly hysteretic for the approaching and the retreating branches. The saturated current value, magnetization, and levitation force are found to depend strongly on the Jc(B) relations. Features of the supercurrent distribution, the force loop, and the levitation force density are discussed.
Keywords
critical currents; current distribution; magnetic forces; magnetic levitation; magnetisation; modelling; permanent magnets; applied inhomogeneous magnetic field; current distribution; field dependent Jc; field profiles; field-dependent critical current; force loop; hysteretic levitation force; levitation force; levitation force density; magnetization; permanent magnet disk; saturated current value; superconductor disk; supercurrent distribution; vertical levitation force; Australia; Current distribution; Demagnetization; Magnetic fields; Magnetic levitation; Permanent magnets; Saturation magnetization; Superconducting magnetic energy storage; Superconducting magnets; Superconducting materials;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2003.813019
Filename
1212042
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