Hysteretic magnetic forces calculation for type-II superconductors

Author

Torng, Terry ; Chen, Quark ; Morton, Blaise ; Lenz, Jim

Author_Institution

Honeywell Syst. & Res. Center, Minneapolis, MN, USA

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2229

Lastpage

2231

Abstract

A complete hysteretic-force loop has been calculated for type-II superconductors. It is shown that, with a known applied field profile, the complete force loop can be calculated by use of C.P. Bean´s (1964) critical state model. A precise prediction of type-Il superconductor behavior in a magnetic field can be made. The sample size, induced critical current density, magnetic history, applied field strength, and gradient effects on levitation force are also considered. Inverse levitation was found to be a natural consequence of flux-trapping in the context of Bean´s model. The design rules for magnetic bearings are discussed

Keywords

critical current density (superconductivity); magnetic hysteresis; magnetic levitation; superconducting magnets; type II superconductors; Bean´s model; applied field profile; applied field strength; critical state model; flux-trapping; gradient effects; hysteretic-force loop; induced critical current density; inverse levitation; levitation force; magnetic bearings; type-II superconductors; Current distribution; Equations; Gravity; Lorentz covariance; Magnetic fields; Magnetic forces; Magnetic hysteresis; Magnetic levitation; Magnetization; Superconductivity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179452

Filename

179452