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A Study on the Quench Initiation and Propagation Characteristics in GdBCO Racetrack Pancake Coil for Large-Scale Rotating Machines

대형회전기기응용을 위한 GdBCO 레이스트랙형 팬케이크 코일의 ��치 발생과 전파특성에 관한 연구

  • 양동규 (고려대학교 신소재공학과) ;
  • 송정빈 (고려대학교 신소재공학과) ;
  • 김광록 (고려대학교 신소재공학과) ;
  • 권오준 (고려대학교 신소재공학과) ;
  • 이우승 (연세대학교 전기전자공학과) ;
  • 고태국 (연세대학교 전기전자공학과) ;
  • 이해근 (고려대학교 신소재공학과)
  • Received : 2011.09.02
  • Accepted : 2011.09.23
  • Published : 2011.09.30

Abstract

The stability issue of high temperature superconducting (HTS) racetrack coils is one of the most important factors for the development of large-scale rotating machines, such as ship propulsion motors and power generators. However, The stability and normal zone propagation characteristics of HTS racetrack pancake (RP) coils are not sufficient yet. In this study, quench tests for a GdBCO racetrack pancake coil were carried out under the condition of $LN_2$ at 77 K. Minimum quench energy and two-dimensional normal zone propagation velocities of the coil are also discussed. Normal zone propagation velocity in the coil's curved section is faster than in its straight section due to stress effects. The test results show that the protection of the straight section is of greater importance than that of the curved section when GdBCO racetrack pancake coils are applied to large-scale rotating machines.

Keywords

References

  1. T Nakamura, "Progress of HTS rotating machine development in Japan", Superconductivity and Cryogenics, vol. 13, 1-4, 2011.
  2. H M Kim, Y K Kwon, J D Lee, J B Song, H G Lee, "Quench and recovery characteristics of a racetrack double pancake coil wound with YBCO-coated conductor", Supercond. Sci. Technol., vol. 22, 025014, 2009. https://doi.org/10.1088/0953-2048/22/2/025014
  3. T Okazaki, H Sugimoto, T Takeda, "Liquid Nitrogen Cooled HTS Motor for Ship Propulsion", IEEE Power Eng. Soc. General Mtg., 1-6, 2006
  4. M Iwakuma, Y Hase, T Satou, A Tomioka, M Konno, Y Iijima, T Saitoh, Y Yamada, T Izumi, Y Shiohara, "Production and test of a ReBCO superconducting synchronous motor", IEEE Trans. Appl. Supercond., vol. 19, no.3, 1648-1651, 2009. https://doi.org/10.1109/TASC.2009.2017831
  5. J W Lue, L Dresner, S W Schwenterly, D Aized, J M Campbell, R E Schwall, "Stability measurements on a 1-T High temperature superconducting magnet", IEEE Trans. Appl. Supercond., vol.. 5, no. 2, 230-233, 1995. https://doi.org/10.1109/77.402531
  6. W S Kim, F Trillaud, M C Ahn, Y Iwasa, X Peng, M Tomsic, "Normal Zone Propagation in 2-Dimensional YECO Winding Pack Models", IEEE Trans. Appl. Supercond., vol. 18, no. 2, 1249-1252, 2008. https://doi.org/10.1109/TASC.2008.922344
  7. W S Kim, F Trillaud, I C Ang, S Y Hahn, Y Iwasa, "Normal zone propagation in YECO winding pack models", IEEE Trans. Appl. Supercond., vol. 17, no. 2, 2478-2481, 2007. https://doi.org/10.1109/TASC.2007.898159
  8. Y Iwasa, "Stability and Protection of Superconducting Magnets-A Discussion", IEEE Trans. Appl. Supercond., vol. 15, no. 2, 1615-1620, 2005. https://doi.org/10.1109/TASC.2005.849207
  9. J D Lee, Y K Kwon, S K Baik, E Y Lee, Y C Kim, T S Moon, H J Park, W S Kwon, J P Hong, M W Park, I K Yu, Y S Jo, "Thermal quench in HTS double pancake race track coil", IEEE Trans. Appl. Supercond., vol. 17, no. 2, 1603-1606, 2007. https://doi.org/10.1109/TASC.2007.898184
  10. H Song, K Gagnon, J Schwartz, "Quench behavior of conduction-cooled $YBa_2Cu_3O_{7-{\delta}}$ coated conductor pancake coils stabilized with brass or copper", Supercond. Sci. Technol., vol. 23, 065021, 2010. https://doi.org/10.1088/0953-2048/23/6/065021
  11. K L Kim, J B Song J H Choi, S H Kim, D Y Koh, K C Seong, H M Chang, H G Lee, "The design and testing of a cooling system using mixed solid cryogen for a portable superconducting magnetic energy storage system", Supercond. Sci. Technol., vol. 23, 125006, 2010. https://doi.org/10.1088/0953-2048/23/12/125006
  12. D G Yang, J B Song, Y H Choi, M C Ahn, J B Na, T K Ko, H G Lee, "Quench and recovery characteristics of the Zr-doped (Gd, Y) BCO coated conductor pancake coils insulated with copper and kapton tapes", IEEE Trans. Appl. Supercond., vol. 21, no. 3, 2415-2419, 2011. https://doi.org/10.1109/TASC.2010.2090323
  13. S K Baik, M H Sohn, R K Ko, Y K Kwcn, K S Ryu, Y S Jo, "Quench current improvement through shape modification of racetrack coil", Cryogenics, vol. 42, 1-7, 2002. https://doi.org/10.1016/S0011-2275(01)00151-5
  14. P W Bridgman, "The effect of pressure on the thermal conductivity of metals", Proceedings of the American Academy of Arts and Sciences, vol. 57, 77-127, 1921.
  15. C Starr, "The Pressure Coefficient of Thermal Conductivity of Metals", Physical Review, vol. 54, 210-216, 1938. https://doi.org/10.1103/PhysRev.54.210