Experimental test and analysis of AC losses in multifilamentary MgB2 wire

Jiawen Xi; Xiaoze Pei; Jie Sheng; Hideki Tanaka; Yota Ichiki; Min Zhang; Weijia Yuan

doi:10.1109/TASC.2019.2903924

Experimental test and analysis of AC losses in multifilamentary MgB₂ wire

Jiawen Xi, Xiaoze Pei^*, Jie Sheng, Hideki Tanaka, Yota Ichiki, Min Zhang, Weijia Yuan

^*Corresponding author for this work

Electronic And Electrical Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

30 Downloads (Pure)

Abstract

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.

Original language	English
Article number	8201205
Number of pages	5
Journal	IEEE Transactions on Applied Superconductivity
Volume	29
Issue number	5
Early online date	8 Mar 2019
DOIs	https://doi.org/10.1109/TASC.2019.2903924
Publication status	Published - 31 Aug 2019

Funding

Manuscript received October 25, 2018; accepted February 27, 2019. Date of publication March 8, 2019; date of current version April 1, 2019. This work was funded as part of the UK EPSRC, Developing Superconducting Fault Current Limiters (SFCLs) for Distributed Electric Propulsion Aircraft: EP/S000720/1. (Corresponding author: Xiaoze Pei.) J. Xi and X. Pei are with the Department of Electronic and Electrical Engineering, University of Bath, Bath, BA2 7AY, U.K. (e-mail:,[email protected]; [email protected]).

Keywords

AC losses
eddy current loss
ferromagnetic loss
hysteresis loss
magnesium diboride (MgB2)
multifilamentary superconductor

Access to Document

10.1109/TASC.2019.2903924

Xi-etal-IEEE-TAS-2019-Experimental-test-and-analysis-of-AC-losses-in-multifilamentary-MgB2-wireAccepted author manuscript, 567 KB

Cite this

@article{d6df1c96166a4ca08e14b181ac2db224,

title = "Experimental test and analysis of AC losses in multifilamentary MgB2 wire",

abstract = " 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. ",

keywords = "AC losses, eddy current loss, ferromagnetic loss, hysteresis loss, magnesium diboride (MgB2), multifilamentary superconductor",

author = "Jiawen Xi and Xiaoze Pei and Jie Sheng and Hideki Tanaka and Yota Ichiki and Min Zhang and Weijia Yuan",

note = "{\textcopyright} 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.",

year = "2019",

month = aug,

day = "31",

doi = "10.1109/TASC.2019.2903924",

language = "English",

volume = "29",

journal = "IEEE Transactions on Applied Superconductivity",

issn = "1051-8223",

number = "5",

}

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

SN - 1051-8223

VL - 29

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 5

M1 - 8201205

ER -