Development of conductors for superconducting generators

Author

Ogawa, T. ; Uyeda, K. ; Takahashi, K. ; Saito, T. ; Tanaka, Y. ; Nagata, M. ; Kono, O. ; Kamata, K. ; Taniguchi, H.

Author_Institution

Eng. Res. Assoc. for Sueprconductive Generation Equipment & Mater., Osaka, Japan

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

1783

Lastpage

1786

Abstract

Basic design studies are conducted for 7-MVA superconducting generators, and superconductors are developed. For generators, it is intended to develop a slow-response-excitation-type generator with emphasis placed on stability and higher current density, and a quick-response-excitation-type generator with reduction of AC loss for enhancing the excitation speed. Three kinds of NbTi field windings for these superconducting generators were designed and developed with targets set for the conductor size, critical current, AC loss, void fraction, etc. The development of a conductor processing technique, improvement of the heat treatment technique, and development of a composite stranded wire technique were pursued. For Nb₃Sn conductors, research was conducted to enhance the current density of strands and their workability by a bronze process and an in situ process

Keywords

AC generators; composite superconductors; critical currents; eddy current losses; heat treatment; magnetic leakage; superconducting machines; superconducting magnets; 70 MVA; A15 superconductor; Nb₃Sn conductors; NbTi field windings; bronze process; composite stranded wire technique; conductor processing technique; design studies; excitation speed; heat treatment technique; higher current density; in situ process; quick-response-excitation-type generator; reduction of AC loss; slow-response-excitation-type generator; stability; superconducting generators; void fraction; workability; AC generators; Conductors; Critical current; Current density; Heat treatment; Niobium compounds; Stability; Superconducting filaments and wires; Superconductivity; Titanium compounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133537

Filename

133537