Yagai Tsuyoshi

(谷貝剛)

Profile Information

Affiliation: Professor, Faculty of Science and Technology, Department of Engineering and Applied Sciences, Sophia University

Degree: 学士(東北大学)
修士(東北大学)
博士（工学）(東北大学)

Researcher number: 60361127
J-GLOBAL ID: 201301010164130335
researchmap Member ID: 7000004361

(Subject of research)
Investigation on superconducting magnetic energy storage device made of MgB2 cooled by Liquid hydrogen for stabilizing power generation produced by renewable energy sources

Research Interests

Research Areas

Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electrical power engineering /

Awards

2025

令和６年度核融合炉工学共同研究優秀賞, 電磁応力下における多重撚り導体の機械的・電磁的現象把握と線材高強度化設計指針の構築, 量子科学研究開発機構

伴野信哉, 谷貝剛, 宇藤裕康
2022

令和４年度学術論文賞, 大型磁石応用への大電流容量MgB2導体開発, 低温工学・超電導学会

谷貝剛, 高橋雅史, 高尾智明, 新冨孝和, 槙田康博, 駒込敏弘, 平野直樹, 濱島高太郎, 菊池章弘, 西島元, 松本明善

Major Papers

124

Developing a New DC-to-DC Converter for Ultra-Fast Charges of Electric Vehicles Using Superconducting Inductors Cooled With Liquid Hydrogen

T. Yagai, Y. Makida, T. Shintomi, N. Hirano, T. Hamajima

IEEE Transactions on Applied Superconductivity, 35(5) 1-5, Aug, 2025 Peer-reviewedLead author
Demonstration of kA-Class Rutherford Cables Using MgB₂Wires for an Energy Storage Device Suitable for a Liquid Hydrogen Indirect Cooling

Yagai, T., Takahashi, M., Inomata, R., Takao, T., Onji, T., Komagome, T., Makida, Y., Shintomi, T., Hirano, N., Hamajima, T., Kikuchi, A., Nishijima, G., Matsumoto, A.

IEEE Transactions on Applied Superconductivity, 32(6) 1-5, Sep, 2022 Peer-reviewed

Misc.

Influence of Load Weight Distribution on Horizontal Vibration Characteristic in Magnetic Levitation Type Superconducting Seismic Isolation Device

TAMASHIRO Keisuke, KAWASAKI Takeshi, YAGAI Tsuyoshi, TSUDA Osamu, HAMAJIMA Takataro, YAMADA Takayuki, YASUI Kenji

78 129-129, May 26, 2008
Performance of a long HTS Tri-Axial transmission line

HU Nannan, SOEDA Seiji, SHIMOYAMA Kazuki, OZCIVAN Nuri, YAGAI Tsuyoshi, TSUDA Makoto, HAMAJIMA Takataro

78 203-203, May 26, 2008
Investigation of the effective cross sections of the coupling current loops in different shape CIC conductors

YAGAI Tsuyoshi, SHIBATA Yasuyuki, OMURA Jun, TSUDA Makoto, HAMAJIMA Takataro, NUNOYA Yoshihiko, OKUNO Kiyoshi, TAKAHATA Kazuya

78 195-195, May 26, 2008
Coupling Loss Depending on Shapes of Cable-in-Conduit Conductor

大村惇, 柴田健志, 奈良雄樹, 谷貝剛, 津田理, 濱島高太郎, 布谷嘉彦, 奥野清, 高畑一也

電気学会超電導応用電力機器研究会資料, ASC-08(19-26.28-31), 2008
大型CIC導体内に発生する結合損失の形状特性に関する考察

柴田健志, 大村惇, 奈良雄樹, 谷貝剛, 津田理, 濱島高太郎, 布谷嘉彦, 奥野清, 高畑一也

電気学会電力・エネルギー部門大会論文集(CD-ROM), 2008, 2008
AC Losses of a Tri-axial Superconducting Cable with Balanced Three-phase Current Distributions

T. Hamajima, M. Tsuda, T. Yagai, A. Nuri Ozcivan, K. Shimoyama, K. Aoyagi, S. Soeda

Journal of Physics: Conference Series, 97(012253), 2008
Design of power control system using SMES and SVC for fusion power plant

K. Niiyama, T Yagai, M. Tsuda, T. Hamajima

Journal of Physics: Conference Series, 97(012271) 1-6, 2008
Improvement of Levitation Force Characteristics in Magnetic Levitation Type Seismic Isolation Device Composed of HTS Bulk and Permanent Magnet

M. Tsuda, T. Kawasaki, T. Yagai, T. Hamajima

Journal of Physics:Conference Series, 97(012104) 1-6, 2008
Investigation of strand locations after compressed in CIC Conductor

NARA Yuki, OMURA Zyun, YAGAI Tsuyoshi, TUDA Makoto, HAMAJIMA Takataro, NUNOYA Yoshihiko, OKUNO Kiyoshi, TAKAHATA Kazuya

2007(45) 7-11, Jun 1, 2007
Construction of 3D measurement system of strand traces in a large CIC conductor

YAGAI Tsuyoshi, OMURA Jun, NARA Yuuki, TSUDA Makoto, HAMAJIMA Takataro, NUNOYA Yoshihiko, OKUNO Kiyoshi, TAKAHATA Kazuya

Abstracts of CSJ Conference, 2007, 76 208, May 16, 2007
大型CIC導体に電磁力模擬圧縮力を印加したときの素線配置変位の検討

谷貝剛, 大村惇, 奈良雄樹, 津田理, 濱島高太郎, 布谷嘉彦, 奥野清, 高畑一也

電気学会電力・エネルギー部門大会論文集(CD-ROM), 2007, 2007
素線数の異なる大型超電導CIC型導体の素線軌跡の比較研究

奈良雄樹, 大村惇, 谷貝剛, 津田理, 濱島高太郎, 布谷嘉彦, 奥野清, 高畑一也

低温工学・超電導学会講演概要集, 77th, 2007
Invesitigation of the formation of irregular loops in the large CIC conductor

YAGAI Tsuyoshi, NARA Yuki, SATO Hidenori, TSUDA Makoto, HAMAJIMA Takataro, NUNOYA Yoshihiko, OKUNO Kiyoshi, TAKAHATA Kazuya

75 250, Nov 15, 2006
圧縮力印加時のCIC導体の素線間接触抵抗変化

谷貝剛, 奈良雄樹, 佐藤秀成, 津田理, 浜島高太郎, 高畑一也

電気学会全国大会講演論文集, 2006(5), 2006
Study on loops with long time constants formed by strands in CIC using three-dimensional measurement

佐藤秀成, 奈良雄樹, 谷貝剛, 津田理, 濱島高太郎, 布谷嘉彦, 奥野清, 高畑一也

電気学会超電導応用電力機器研究会資料, ASC-06(16-35.37-38), 2006
CIC導体に圧縮力が印加されたときの素線間接触状況変化

谷貝剛, 奈良雄樹, 佐藤秀成, 津田理, 濱島高太郎, 高畑一也

低温工学・超電導学会講演概要集, 74th, 2006
大型CIC導体内の不規則な素線軌跡の解析

谷貝剛, 奈良雄樹, 佐藤秀成, 津田理, 濱島高太郎, 布谷嘉彦, 奥野清, 高畑一也

核融合エネルギー連合講演会予稿集, 6th, 2006
Analysis of Balanced Three-phase Currents in a Tri-axial HTS Cable

T. Hamajima, M. Tsuda, T. Yagai

J. Cryo.Soc.Jpn, 40(10) 425-432, 2005
Feasibility Study on Superconducting Applications of MgB_2

HAMAJIMA T., YAGAI T.

71 36, Nov 1, 2004

Presentations

High-speed numerical calculation of current distribution in a large CIC conductor by newly developed Revised Sparse-Tableau method

May 28, 2025

Attachment
EVの急速充電用超電導DCDCコンバータの高昇圧比・大電流化

谷貝剛, 槙田康博, 新冨孝和, 平野直樹, 濱島高太郎

2025年度春季低温工学・超電導学会, May 28, 2025

Attachment
液体水素冷熱の有効利用と EVの急速充電を実現する超電導DCDCコンバータの開発

谷貝剛, 槙田康博, 新冨孝和, 平野直樹, 濱島高太郎

2024年度春季低温工学・超電導学会, May 25, 2024
高粒子透過性検出器を実現する薄肉ソレノイドコイル用アルミ安定化MgB2導体開発

谷貝剛, 猪俣涼, 吉田輝弥, 槙田康博, 新冨孝和, 平野直樹, 濱島高太郎

2024年度秋季低温工学・超電導学会, Dec 4, 2023
大型SMES磁石応用への大電流容量MgB2導体開発

谷貝剛, 高橋雅史, 高尾智明, 新冨孝和, 槙田康博, 駒込敏弘, 平野直樹, 濱島高太郎, 菊池章弘, 西島元, 松本明善

2024年度春季低温工学・超電導学会, Jun 1, 2023 Invited

Professional Memberships

Research Projects

Ultra fine A15 superconducting wire for high-field accelerator magnets

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2021 - Mar, 2024
Quench protection of MgB2 thin superconducting solenoid for particle detector

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2021 - Mar, 2024

MAKIDA Yasuhiro
Development of large-capacity SMES realizing a highly stabilized power conditioning system with low-carbon emission by utilizing liquid hydrogen providing network.

Apr, 2021 - Mar, 2022

T. Yagai
Basic research on evaluation method of mechanical strain effect and coiling technology of high-temperature superconducting wires

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2016 - Mar, 2020

Nomura Shinichi
Investigation of twist-pitch dependence on AC losses in CIC conductor based on strand location measurement

Apr, 2015 - Mar, 2018

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