Design considerations for force-balanced coil applied to SMES

Author

Nomura, Shinichi ; Ajiki, Dabide ; Suzuki, Chisato ; Watanabe, Naruaki ; Koizumi, Etsuko ; Tsutsui, Hiroaki ; Tsuji-Iio, Shunji ; Shimada, Ryuichi

Author_Institution

Res. Lab. for Nucl. Reactors, Tokyo Inst. of Technol., Japan

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

1920

Lastpage

1923

Abstract

Strong electromagnetic force caused by high magnetic field and large coil current is a serious problem in superconducting magnetic energy storage (SMES) systems. In facing this problem, we propose the concept of force-balanced coil (FBC) which is a helical-winding toroidal coil and can reduce the centering force of toroidal field coil (TFC). The helical-winding of the FBC is modulated in order to reduce the torsional force. This paper describes the cost-related parameters of the FBC in terms of the dimension of the coil, the ampere-meters of superconductors and the surface area of the coil compared with the TFC and the solenoid. Moreover, we discuss the structure requirements by the virial theorem and improve the concept of FBC in terms of the further optimization of SMES through the structural analysis

Keywords

electromagnetic forces; superconducting coils; superconducting magnet energy storage; SMES; electromagnetic force; force-balanced coil; helical-winding toroidal coil; high magnetic field; large coil current; solenoid; structural analysis; superconducting magnetic energy storage; toroidal field coil centering force; torsional force reduction; virial theorem; Conductors; Electromagnetic forces; Energy storage; Machine windings; Magnetic analysis; Samarium; Solenoids; Superconducting coils; Superconducting magnetic energy storage; Toroidal magnetic fields;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.920226

Filename

920226