Characteristics of persistent-current mode of HTS coil on superconducting electromagnet

C. Y. Lee, J. Kim, Y. J. Han, B. Kang, Y. D. Chung, Y. S. Yoon, S. Y. Chu, Y. J. Hwang, H. C. Jo, J. Y. Jang, T. K. Ko

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Abstract

This paper investigates the way in which the levitation gap of an electromagnetic suspension (EMS) system affects the current decay rate of superconducting electromagnet (SC-EM) operated in persistence-current mode (PCM). Using inductance analyzed from the magnetic circuit of an EMS model, the current decay rate caused by the variation in the levitation gap was simulated. In order to experimentally verify the simulation results, we fabricated a small-scale EMS model with SC coil operated in PCM and measured the current decay rates at different levitation gaps. The result showed that the presence of iron core provides a significant benefit in the PCM performance of SC coil, but the benefit decreased as the levitation gap increases. This study revealed that the increased levitation gap of the EMS model with the SC-EM could negatively affect the design of SC-EM operated in PCM.

Original languageEnglish
Pages (from-to)1424-1427
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume471
Issue number21-22
DOIs
Publication statusPublished - 2011 Nov 1

All Science Journal Classification (ASJC) codes

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

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    Lee, C. Y., Kim, J., Han, Y. J., Kang, B., Chung, Y. D., Yoon, Y. S., Chu, S. Y., Hwang, Y. J., Jo, H. C., Jang, J. Y., & Ko, T. K. (2011). Characteristics of persistent-current mode of HTS coil on superconducting electromagnet. Physica C: Superconductivity and its applications, 471(21-22), 1424-1427. https://doi.org/10.1016/j.physc.2011.05.208