TY - JOUR
T1 - Experimental test and analysis of AC losses in multifilamentary MgB2 wire
AU - Xi, Jiawen
AU - Pei, Xiaoze
AU - Sheng, Jie
AU - Tanaka, Hideki
AU - Ichiki, Yota
AU - Zhang, Min
AU - Yuan, Weijia
N1 - © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
PY - 2019/8/31
Y1 - 2019/8/31
N2 - AC losses in superconductors are essential for the design of cooling system for large scale power applications. Magnesium diboride (MgB2 ) superconducting wires have been investigated and manufactured over the last decade due to cheap raw materials and flexibility for coil design. In addition, multifilamentary MgB2 wires have been manufactured to reduce ac losses. In this paper, self-field ac losses of multifilamentary MgB2 wires with magnetic barrier are investigated using both experimental and numerical methods. A short straight wire sample and a coil sample are tested under various temperatures and frequencies between 16-and 128-Hz. The test results show that the transportation loss is independent of the operating temperature. On basis of both theoretical and numerical study, it is found that hysteresis loss in superconductor accounts only for a small fraction of the transportation losses, ferromagnetic hysteresis loss in the magnetic barrier dominates when the transport current is low, whereas eddy current loss dominates when the transport current is close to the critical current.
AB - AC losses in superconductors are essential for the design of cooling system for large scale power applications. Magnesium diboride (MgB2 ) superconducting wires have been investigated and manufactured over the last decade due to cheap raw materials and flexibility for coil design. In addition, multifilamentary MgB2 wires have been manufactured to reduce ac losses. In this paper, self-field ac losses of multifilamentary MgB2 wires with magnetic barrier are investigated using both experimental and numerical methods. A short straight wire sample and a coil sample are tested under various temperatures and frequencies between 16-and 128-Hz. The test results show that the transportation loss is independent of the operating temperature. On basis of both theoretical and numerical study, it is found that hysteresis loss in superconductor accounts only for a small fraction of the transportation losses, ferromagnetic hysteresis loss in the magnetic barrier dominates when the transport current is low, whereas eddy current loss dominates when the transport current is close to the critical current.
KW - AC losses
KW - eddy current loss
KW - ferromagnetic loss
KW - hysteresis loss
KW - magnesium diboride (MgB2)
KW - multifilamentary superconductor
UR - http://www.scopus.com/inward/record.url?scp=85064073469&partnerID=8YFLogxK
UR - https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=77
UR - https://researchportal.bath.ac.uk/en/publications/experimental-test-and-analysis-of-ac-losses-in-multifilamentary-m
U2 - 10.1109/TASC.2019.2903924
DO - 10.1109/TASC.2019.2903924
M3 - Article
AN - SCOPUS:85064073469
VL - 29
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 5
M1 - 8201205
ER -