Demonstration of two synchronous motors using high temperature superconducting field coils

Author

Joshi, C.H. ; Prum, C.B. ; Schiferl, R.F. ; Driscoll, D.I.

Author_Institution

American Supercond. Corp., Westborough, MA, USA

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

968

Lastpage

971

Abstract

The design, construction and testing of two synchronous motors, having output powers of 1.5 kW and 3.7 kW respectively, is described. Both motors have a salient pole field structure excited by high-temperature superconductor (HTS) coils. The first motor (1.5 kW) is a vertical axis, two-pole machine operating at 3600 rpm with a stationary field structure and a rotating armature whereas the second motor (3.7 kW) has a more conventional rotating field structure with four salient poles operating at 1800 rpm. The racetrack-shaped coils are made with flexible multifilamentary BSCCO conductor and operate at liquid nitrogen temperature and remained superconducting under all operating conditions. Each HTS coil contains approximately 170 m of conductor. The coils used in these motors have experienced over 40 thermal cycles with no degradation in performance. These demonstration motors represent a significant advancement in the application of HTS to electrical rotating machinery.<>

Keywords

design engineering; high-temperature superconductors; machine testing; machine windings; multifilamentary superconductors; superconducting coils; superconducting machines; superconducting magnets; synchronous motors; 1.5 kW; 170 m; 3.7 kW; BiSrCaCuO; construction; design; electrical rotating machinery; high temperature superconducting field coils; liquid nitrogen; multifilamentary BSCCO conductor; performance; racetrack-shaped coils; rotating armature; rotating field structure; salient pole field structure; salient poles; stationary field structure; synchronous motors; testing; thermal cycles; Bismuth compounds; Conductors; High temperature superconductors; Multifilamentary superconductors; Nitrogen; Power generation; Superconducting coils; Synchronous motors; Testing; Thermal degradation;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402711

Filename

402711