Experimental Study on Current Decay Characteristics of Persistent Current HTS Magnet by Alternating Magnetic Field

Young Gun Park, Chang Young Lee, Young Jin Hwang, Woo Seung Lee, Jiho Lee, Hyun Chul Jo, Yoon Do Chung, Tae Kuk Ko

Research output: Contribution to journalConference article

2 Citations (Scopus)


This paper deals with a current decay characteristics of a high temperature superconducting (HTS) magnet operated in persistent current mode (PCM). In superconducting synchronous machine applications such as linear synchronous motor (LSM), the superconducting coil is designed to operate in the PCM to obtain steady magnetic field with DC transport current. This superconducting magnet operates on a direct current, but it can be exposed to alternating magnetic field due to the armature winding. When the magnet is subjected to an external time-varying magnetic field, it is possible to result in a decay of the current in PCM system due to AC loss. In this research, a PCM system with armature coil which generates time-varying magnetic field was fabricated to verify current decay characteristics by external alternating magnetic field. The current decay rate was measured by using a hall sensor as functions of amplitude and frequency of armature coil.

Original languageEnglish
Pages (from-to)268-271
Number of pages4
JournalPhysics Procedia
Publication statusPublished - 2014 Jan 1
Event26th International Symposium on Superconductivity, ISS 2013 - Tokyo, Japan
Duration: 2013 Nov 182013 Nov 20


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this