Earticle

초록

영어

The through-thickness breakdown of a single 12.5 μm-thick Kapton film and the pressure-dependent turn-to-turn alternating-current (AC) breakdown of Kapton-wrapped conductors were investigated for superconducting-coil insulation. A 20 mm-film stainless-steel dummy conductor was tested from 800 to 1×10−5 Torr; commercial rare-earth barium copper oxide (REBCO) conductors from SST (Shanghai Superconductor Technology Co., Ltd.) and 7 mm-film dummy conductors were compared at 800, 1×10−1, and 1×10−5 Torr; and 7 and 30 mm films from the same manufacturer and cutting process were compared at 1×10−1 Torr. All values are two-parameter Weibull characteristic voltages; the single film gave 1.84 kV at 800 Torr. The 20 mm dummy conductor showed a nonmonotonic pressure dependence: 7.01, 0.48, and 5.48 kV at 800, 1×10−1, and 1×10−5 Torr. The SST conductor showed 4.61, 0.47, and 5.07 kV, and the 7 mm dummy conductor 6.29, 0.56, and 5.09 kV. The 30 mm film yielded 0.89 kV, 55.6% higher than the 7 mm film (0.57 kV). The pressure dependence and absence of distinct puncture marks suggest gas-assisted surface or interfacial discharge paths. The dummy conductor reproduced the SST conductor's pressure dependence, and film width showed potential as a structural insulation-design variable. These room-temperature results are comparative data, not cryogenic design limits.

목차

Abstract
1. 서론
2. 샘플제작 및 시험 방법
2.1. 캡톤 필름 관통절연파괴전압 시험
2.2. 압력 취약구간 탐색 시험
2.3. SST 상용선재 및 7 mm 모의선재 비교 실험
2.4. 7 mm, 30 mm 모의선재 비교 실험
2.5. 압력 제어 및 파괴판정
2.6. 데이터 처리
3. 실험 결과
3.1. 캡톤 필름의 관통절연파괴
3.2. 20 mm 모의선재의 압력 취약 구간
3.3. SST 선재와 7 mm 모의선재의 비교
3.4. 절연파괴 흔적과 추정 파괴경로
3.5. 캡톤 필름 너비에 따른 턴간 절연파괴 특성
4. 고찰
4.1. 관통절연파괴와 압력 의존적 턴간 절연파괴
4.2. SST 상용선재와 7 mm 모의선재의 비교
4.3. 캡톤 필름 너비의 영향과 설계적 의미
4.4. 적용 범위와 한계
5. 결론
ACKNOWLEDGMENT
REFERENCES

키워드

저자

• Inhoo Ban [ Korea National University of Transportation, Chungju, Korea ]
• Bonhyuk Ku [ Korea National University of Transportation, Chungju, Korea ]
• Yechan Kim [ Korea National University of Transportation, Chungju, Korea ]
• Giwon Go [ Korea National University of Transportation, Chungju, Korea ]
• Jehui Lee [ Korea National University of Transportation, Chungju, Korea ]
• Chanhyeok Jang [ Korea National University of Transportation, Chungju, Korea ]
• Hyoungku Kang [ Korea National University of Transportation, Chungju, Korea ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537