Modeling forces in high-temperature superconductors

Author

Turner, Larry R. ; Foster, Matthew W.

Author_Institution

Div. of Energy Technol., Argonne Nat. Lab., IL, USA

Volume

34

Issue

5

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

3024

Lastpage

3027

Abstract

We have developed a simple model that uses computed shielding currents to determine the forces acting on a high-temperature superconductor (HTS). The model has been applied to measurements of the force between HTS and permanent magnets (PM). Results show the expected hysteretic variation of force as the HTS moves first toward and then away from a permanent magnet, including the reversal of the sign of the force. Optimization of the shielding currents is carried out through a simulated annealing algorithm in a C++ program that repeatedly calls a commercial electromagnetic software code. Agreement with measured forces is encouraging

Keywords

finite element analysis; high-temperature superconductors; simulated annealing; C++ program; electromagnetic software code; finite element model; high temperature superconductor; hysteresis; magnetic force; optimization; permanent magnet; shielding current; simulated annealing algorithm; Conductors; Cost function; Critical current density; Engine cylinders; Flywheels; Force measurement; High temperature superconductors; Integral equations; Permanent magnets; Renewable energy resources;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.717707

Filename

717707