Design of Indirect Closed-Cycle Cooling Scheme Coupled with a Cryocooler for a 3-MW-Class Higherature Superconducting Synchronous Motor

Thanh Dung Le, Ji Hyung Kim, Do Jin Kim, Chang Jin Boo, Young Sik Jo, Yong Soo Yoon, Kyung Yong Yoon, Yoon Hyuck Choi, Haigun Lee, Ho Min Kim

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3 Citations (Scopus)


The increase in the heat generated from higherature superconducting (HTS) rotating components limits the applicability of a cooling method. Hence, a liquid cooling and convection cooling scheme for high-heat-flux applications has gained interest. An indirect closed-cycle cooling scheme coupled with a cryocooler is an alternative cooling technique, in which the heat of vaporization is transferred from an evaporator to a condenser with a relatively small temperature difference. The cooling system of a demonstrative 3-MW-class HTS motor is presented in this paper. A cryogen was used to maintain uniform temperature of the field coil; the maximum temperature of the HTS coils was approximately 30 K during normal operation. The operation process of the cooling system is illustrated, and the main circulation parameters, namely, cryogen flow rate and the heat flux of cooling system, are investigated.

Original languageEnglish
Article number7438765
JournalIEEE Transactions on Applied Superconductivity
Issue number4
Publication statusPublished - 2016 Jun 1



  • Close-cycle cooling concept
  • cryogenics cooling system
  • higherature superconducting (HTS) motor
  • thermal characteristics

ASJC Scopus subject areas

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

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