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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.13 No.3
- 발행연도
- 2018.5
- 수록면
- 1,166 - 1,172 (7page)
이용수
초록· 키워드
오류제보하기
Degradation due to delamination occurs frequently in the high temperature superconductors (HTS) coil of rotating machines made with 2nd generation (2G) HTS wire, and the authors have observed other similar cases. Since an HTS field coil for a rotating machine is required to have stable current control and maintain a steady state, co-winding techniques for insulation material and epoxy resin for shape retention and heat transfer improvement are applied during coil fabrication. However, the most important limiting factor of this technique is delamination, which is known to be caused by the difference in thermal expansion between the epoxy resin and 2G HTS wire. Therefore, in this study, the experimental results of mixing the ratio of epoxy resin and alumina (Al2O3) filler were applied to the fabrication of small and large test coils to solve the problem of degradation. For the verification of this scheme, eight prototypes of single pancake coils with different shapes were fabricated. They showed good results. The energization and operation maintenance tests of the stacked coils were carried out under liquid neon conditions similar to the operation temperature of an MWclass rotating machine. In conclusion, it was confirmed that the alumina powder mixed with epoxy resin in an appropriate ratio is an effective solution of de-lamination problem of 2G HTS coil.
목차
Abstract
1. Introduction
2. Design of an HTS Prototype Field Coil
3. Experimental Setup and Test Results
4. Conclusions and Discussions
References
참고문헌 (15)
참고문헌 신청
J. Lloberas, A. Sumper, M. Sanmarti, X. Granados, “A review of high temperature superconductors for offshore wind power synchronous generators,” Renewable and Sustainable Energy Reviews, vol. 38, pp. 404-414, 2014.
C. Barth, N. Bagrets, K-P. Weiss, C. M. Bayer and T. Bast, “Degradation free epoxy impregnation of REBCO coils and cables,” Superconductor Science and Technology, vol. 26, no. 5, 2013.
M. Oomen, W. Herkert, D. Bayer, P. Kummeth, T. Arndt, “Manufacturing and test of 2G-HTS coils for rotating machines: Challenges, conductor requirements, realization,” Physica C: Superconductivity and Its Applications, vol. 482, pp.111-118, 2012.
Y. Zhang, D.W. Hazelton, A.R. Knoll, J.M. Duval, P. Brownsey, S. Repnoy, S. Soloveichik, A. Sundaram, R.B. McClure, G. Majkic, V. Selvamanickam, “Adhesion strength study of IBAD-MOCVD-based 2G HTS wire using a peel test,” Physica C, vol. 473, pp. 41-47, 2012.
T. Takematsu, R. Hu, T. Takao, Y. Yanagisawa, H. Nakagome, D. Uglietti, T. Kiyoshi, M. Takahashi, H. Maeda, “Degradation of the performance of a YBCO-coated conductor double pancake coil due to epoxy impregnation,” Physica C, vol. 470, pp. 674-677, 2010.
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