A permanent-magnet rotor for a high-temperature superconducting bearing

Author

Mulcahy, Thomas M. ; Hull, John R. ; Uherka, Kenneth L. ; Abboud, Robert G. ; Wise, James H. ; Carnegie, David W. ; Bakis, Charles E. ; Gabrys, Christopher W.

Author_Institution

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

Volume

32

Issue

4

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

2609

Lastpage

2612

Abstract

Design, fabrication, and performance of a 0.39-m diam., 6.8-kg flywheel rotor with only one bearing is discussed. To achieve low-loss energy storage, the rotor´s segmented-ring permanent magnet (PM) is optimized for levitation and circumferential homogeneity. A PM figure of merit is proposed that appears to correlate with loss data. Pre compression of the PM with fiber-composite banding is necessary for practical rotor speeds

Keywords

flywheels; high-temperature superconductors; machine bearings; magnetic levitation; permanent magnets; rotors; superconducting devices; 0.39 m; 6.8 kg; energy storage; fiber-composite banding; figure of merit; flywheel rotor; high-temperature superconducting bearing; homogeneity; levitation; precompression; segmented-ring permanent magnet; Assembly; Energy storage; Flywheels; High temperature superconductors; Magnetic flux; Magnetic levitation; Magnetic materials; Saturation magnetization; Stators; Superconducting magnetic energy storage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.511408

Filename

511408