Control aspects of superconducting magnets for magnetic suspensions and bearings

Author

Goodall, R.M. ; MacLeod, C.J. ; El-Abbar, A.A. ; Campbell, A.M. ; Jones, H. ; Jenkins, R.G.

Author_Institution

Dept. of Electron. & Electr. Eng., Loughborough Univ. of Technol., UK

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

650

Lastpage

653

Abstract

The paper describes some theoretical and experimental considerations aimed at identifying the main characteristics of high Tc/sub /superconducting magnets for use in controlled applications such as magnetic suspensions and bearings. The theoretical model is formulated to represent the requirements necessary for such applications, and some experiments reinforce this by assessing the effects of periodic variations in both excitation and reluctance over a range of frequencies. In this way a clear understanding can be obtained of the factors which affect the losses in the superconductors, and also the drive voltage requirements are identified for different operating conditions.<>

Keywords

electric current control; electric impedance; high-temperature superconductors; losses; machine bearings; magnetic levitation; magnetic variables control; superconducting coils; superconducting device testing; superconducting magnets; control aspects; current control; drive voltage requirements; excitation; magnetic bearings; magnetic suspension; reluctance; superconducting coil impedance; superconducting magnets; superconductor losses; Control systems; Iron; Magnetic circuits; Magnetic levitation; Magnetic materials; Superconducting coils; Superconducting magnets; Suspensions; Temperature; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402632

Filename

402632