Earticle

초록

영어

We analyzed the temperature dependency of the AC losses in high temperature superconducting (HTS) coils. In the case of a short sample of an HTS tape, the magnetization loss at 4.2 K could be higher than the one at 77 K for a same transport current. It happens when the perpendicular magnetic field is above a certain magnitude. The AC loss characteristics of solenoidal coils have been analyzed at the temperatures of 65 K and 77 K. They were categorized by the aspect ratios. The operating current of a solenoid was normally set about 70 % of the critical current. An HTS solenoid with the same operating current of 77 K causes larger AC losses at 65 K in the most cases of the HTS solenoids. We also analyzed the AC loss characteristics due to the temperature variations for three types of superconducting magnetic energy storages. Two of them were solenoidal types and the other was toroidal type. The results showed the tendency for the coils to have higher AC losses at lower temperature with the same operating currents and scenarios.

목차

Abstract
1. INTRODUCTION
2. ANALYSIS OF AC LOSSES IN HTS SOLENOIDS
2.1. Magnetization Loss with Critical State Model
2.2. Losses of HTS Solenoids
3. CASE STUDIES OF SMES
4. CONCLUSION
ACKNOWLEDGMENT
REFERENCES

키워드

저자

• Yungil Kim [ SuNAM Co. Ltd., Anseong, Korea ]
• Ji-Kwang Lee [ Woosuk University, Wanju-Gun, Korea ]
• Seyeon Lee [ Korea Polytechnic University, Siheung, Korea ]
• Woo-Seok Kim [ Korea Polytechnic University, Siheung, Korea ]
• Siyoung Lee [ Korea Polytechnic University, Siheung, Korea ]
• Kyeongdal Choi [ Korea Polytechnic University, Siheung, 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