Dynamic response of no-insulation and partial-insulation coils for HTS wind power generator

Jung Bin Song, Seungyong Hahn, Youngjae Kim, Daisuke Miyagi, John Voccio, Juan Bascuñán, Haigun Lee, Yukikazu Iwasa

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


In this paper, we present results, experimental and numerical, of the electromagnetic interaction forces between pairs of racetrack coils under time-varying conditions. Three turn-to-turn insulation designs were applied to wind three racetrack coils with GdBCO coated conductor: 1) no insulation (NI); 2) partial insulation (PI) of a polyimide layer every eight turns; and 3) insulation (INS) of a polyimide layer between each, i.e., NI, PI, and INS racetracks. Two racetrack pairs, namely, NI-INS and PI-INS, were tested for their interaction forces, measured with load cell under current-ramping conditions in a bath of liquid nitrogen at 77 K. Good experimental and simulation results validate our equivalent circuit model to compute interaction forces of PI-INS racetrack pair. Overcurrent test of NI and PI coils, where each racetrack coil was charged above critical current (Ic), was also performed to compare coil stability. This result implies that, although the PI winding technique improves the dynamic response, stability will be somewhat compromised.

Original languageEnglish
Article number6994258
JournalIEEE Transactions on Applied Superconductivity
Issue number3
Publication statusPublished - 2015 Jun 1

Bibliographical note

Publisher Copyright:
© 2002-2011 IEEE.


  • Electromagnetic force
  • equivalent circuit model
  • no-insulation
  • partial-insulation
  • wind power generator

ASJC Scopus subject areas

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


Dive into the research topics of 'Dynamic response of no-insulation and partial-insulation coils for HTS wind power generator'. Together they form a unique fingerprint.

Cite this