Miyeon Yoon, Geonjun Lee, Byeong-Joo Kim, Sang Ho Park, Ji-Kwang Lee, Kyeongdal Choi, Woo-Seok Kim
언어
한국어(KOR)
URL
https://www.earticle.net/Article/A494004
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4,000원
원문정보
초록
영어
AC loss is a critical issue in high-temperature superconducting (HTS) coils because it directly increases the cryogenic load of superconducting power devices. In this study, magnetization losses of HTS coils wound with conventional CORC and Straight-CORC hybrid conductors were analyzed using measured conductor magnetization loss data and finite element magnetic field calculations. The Straight-CORC hybrid conductor consists of a four-layer CORC cable with 24 REBCO tapes and a straight stack of 20 tapes positioned inside the round former. Magnetization loss per unit length measured under an external AC magnetic field was represented by piecewise interpolation functions and the magnetic flux density calculated at the center of each cable turn was mapped to the corresponding magnetization loss function. Solenoidal and pancake coils were compared at a peak operating current of 200 A and an inductance of 0.05 H. Compared with the CORC coils, the Straight-CORC coils showed approximately 13~36% lower estimated total magnetization loss for solenoidal geometries and 11~16% lower estimated total magnetization loss for pancake geometries. The estimated magnetization loss normalized by the number of HTS tapes was reduced by approximately 50~64%. These results indicate that the Straight-CORC hybrid conductor is a promising option for reducing magnetization loss in high-current HTS coil application.
목차
Abstract 1. 서론 2. Straight-CORC 하이브리드 도체 3. 코일의 자화손실 추정 방법 3.1. 도체 샘플 및 자화손실 데이터 3.2. 코일의 자기장 해석 기반 자화손실 산정 방법 4. 코일의 자화손실 산정 결과 및 분석 4.1. 코일의 모델링 및 비교조건 4.2. 코일의 추정된 총 자화손실 비교 4.3. 선재 수로 정규화한 추정된 자화손실 비교 5. 결론 ACKNOWLEDGMENT REFERENCES