Characteristic analysis of HTSC persistent current switch for Maglev application

Duck Kweon Bae, Yong Soo Yoon, Hungje Cho, Dong Sung Kim, Yong Cheul Oh, Min Cheol Ahn, Tae Kuk Ko

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


This paper deals with the preliminary study on the HTSC persistent current switch (PCS) for MAGLEV in Korea. The onboard HTSC levitation magnet system for high-speed maglev has advantage in power consumption because it can be operated In persistent current mode (PCM). The high speed superconducting maglev operated in PCM does not need the additional electrical energy to provide levitation force. To develop the PCS having good characteristics, it is important to develop a technology to minimize the joint resistance between two superconducting wires. The HTSC levitation magnet system consists of one HTSC magnet wound with Bi-2223 wire and a persistent current switch (PCS). The inductance of the magnet was 18.5 mH and total joint resistance of the magnet was 5.74×10-7 Ω. The PCS was experimented with respect to various ramping-up rates and magnitudes of charging current. The experimental results were compared with simulation results using finite different method. Based on these results, the current decay of 1 H class PCS using HTSC wire was calculated.

Original languageEnglish
Pages (from-to)2099-2102
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number2
Publication statusPublished - 2007 Jun

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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