Analysis and performance of an axial-gap superconductor motor

Author

Hawsey, R.A. ; Kahl, W.K. ; Schwenterly, S.W. ; Bailey, J.M. ; Sohns, C.W. ; Luton, J.N. ; McConnell, B.W. ; Campbell, V.W.

Author_Institution

Oak Ridge Nat. Lab., TN, USA

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

2252

Lastpage

2255

Abstract

The performance of a variable-speed, AC, superconducting motor has been evaluated. A novel axial-gap geometry was chosen for four-pole, 1800-r/min operation, using a superconducting stator and normal armature. The pool-boiling cryostat contains four solenoidal field windings of filamentary Nb-Ti conductor and has a maximum field of 7 T and an air-gap field of 2-3 T. The armature windings are formed from copper Litz wire and are arranged in 48 radial slots. The wires inside diameter and outside diameter are 17.18 and 69.24 cm, respectively. The armature is driven by three-phase power supplied via slip rings and an adjustable-speed drive. The maximum design power is 100 hp, which can be doubled by using two armatures. Motor-performance data as a function of speed and air-gap flux density are presented for initial low-power tests with a drive capable of delivering 60 A per phase to the armature

Keywords

AC motors; superconducting machines; variable speed drives; 100 hp; 2 to 7 T; 60 A; AC motor; adjustable-speed drive; air-gap flux density; axial-gap; filamentary Nb-Ti conductor; normal armature; pool-boiling cryostat; slip rings; solenoidal field windings; superconducting stator; superconductor motor; three-phase power; variable-speed; AC motors; Air gaps; Conductors; Copper; Geometry; Performance analysis; Power supplies; Stators; Superconducting filaments and wires; Variable speed drives;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133664

Filename

133664