Earticle

초록

영어

The low normal zone propagation velocity (NZPV) of high-temperature superconducting (HTS) tape leads to a quench protection problem in HTS magnet applications. To overcome this limitation, various studies were conducted on HTS coils without turn-toturn insulation (NI coils) that can achieve self-protection. On the other hand, NI coils have some disadvantages such as slow charging and discharging time. Previously, the HTS coils with turn-to-turn insulation (INS coils) were operated in power supply (PS) driven mode, which requires physical contact with the external PS at room-temperature, not in persistent current mode. When a quench occurs in INS coils, the low NZPV delays quench detection and protection, thereby damaging the coils. However, the rotary HTS flux pump supplies the DC voltage to the superconducting circuit with INS coils in a non-contact manner, which causes the INS coils to operate in a persistent current mode, while enabling quench protection. In this paper, a new protection characteristic of HTS coils is investigated with INS coils charging through the rotary HTS flux pump. To experimentally verify the quench protection characteristic of the INS coil, we investigated the current magnitude of the superconducting circuit through a quench, which was intentionally generated by thermal disturbances in the INS coil under charging or steady state. Our results confirmed the protection characteristic of INS coils using a rotary HTS flux pump.

목차

Abstract
1. INTRODUCTION
2. EXPERIMENTAL SETUP
2.1. Rotary HTS flux pump
2.2. Structure of HTS coil
2.3. Superconducting Equivalent Circuit
3. RESULT AND DISCUSSION
4. CONCLUSION
ACKNOWLEDGMENT
REFERENCES

키워드

저자

• Seunghak Han [ Department of Electrical and Electronic Engineering, Yonsei University, Seoul, South Korea ]
• Ji Hyung Kim [ Department of Electrical Engineering, Jeju National University, Jeju, South Korea ]
• Yoon Seok Chae [ Department of Electrical Engineering, Jeju National University, Jeju, South Korea ]
• Huu Luong Quach [ Department of Electrical Engineering, Jeju National University, Jeju, South Korea ]
• Yong Soo Yoon [ Department of Electrical Engineering, Shin Ansan University, Ansan, South Korea ]
• Ho Min Kim [ Department of Electrical Engineering, Jeju National University, Jeju, South 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