Estimation of Current Decay Performance of HTS Electromagnet for Maglev

Author

Lee, Chang Young ; Jo, Jung Min ; Han, Young Jae ; Bae, Duck Kweon ; Yoon, Yong Soo ; Choi, Sukjin ; Park, Dong Keun ; Ko, Tae Kuk

Author_Institution

Korea Railroad Res. Inst., Uiwang, South Korea

Volume

20

Issue

3

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

907

Lastpage

910

Abstract

This paper deals with the estimation of current decay rates resulting persistent current mode (PCM) performance and its affect on design of high temperature superconducting (HTS) coil models used in an HTS electromagnet. The HTS coil models were designed to generate the required magneto motive force(MMF) on HTS electromagnets operating at various levitation gaps. We simulated the current decay rate with the self-inductance and joint resistance of the superconducting coil. The current decay rates of the models for the 10 mm levitation gap were in the range of 4.5% to 18%, whereas current decay rates of the models for the 25 mm levitation gap were in the range of 2.2% to 5.3%. It was found that the HTS electromagnet for large levitation gaps had more advantages than those for narrow air gaps in regards to designing an HTS coil with better PCM performance.

Keywords

high-temperature superconductors; magnetic levitation; superconducting coils; superconducting magnets; HTS electromagnet; Maglev; current decay performance; high temperature superconducting coils; levitation gaps; magnetomotive force; persistent current mode; Electromagnet; HTS; PCM; maglev;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2040951

Filename

5433264