http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Analysis of AC losses in HTS coils by temperature variations
Kim, Yungil,Lee, Ji-Kwang,Lee, Seyeon,Kim, Woo-Seok,Lee, Siyoung,Choi, Kyeongdal The Korean Society of Superconductivity and Cryoge 2018 한국초전도저온공학회논문지 Vol.20 No.4
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.
REBCO CC 병렬도체의 자화손실 측정값으로부터 추정한 임계전류밀도
김영일(Yungil Kim),이세연(Seyeon Lee),박상호,이지광(Ji-Kwang Lee),최경달(Kyeongdal Choi) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.4
비접촉 방식으로 측정이 가능한 자화손실을 측정하고, 측정된 자화손실 겨로가 값으로부터 임계전류밀도를 추정하는 방법을 제안하였다. 일반적인 형태의 단일 선재를 이용한 임계전류 측정과 추정방법의 비교를 통해 임계전류 추정방법의 타당성을 검증하였고, 이러한 추정방법을 이용하여 적층 및 분할 선재의 추정된 임계전류 밀도 결과를 나타내었다.