2002 Fiscal Year Annual Research Report

バルク超伝導体の特性評価と応用のための基礎的研究

Research Project

Project/Area Number	13450116
Research Institution	Waseda University
Principal Investigator	石山敦士早稲田大学, 理工学部, 教授 (00130865)
Co-Investigator(Kenkyū-buntansha)	津田理山口大学, 工学部, 助手 (10267411) 若尾真治早稲田大学, 理工学部, 助教授 (70257210)
Keywords	バルク超伝導体 / 着磁特性 / 磁化特性 / 磁気浮上特性 / 磁気搬送装置 / リニアアクチュエータ / 低温真空断熱容器 / 有限要素法解析
Research Abstract	1.バルク超伝導体の基礎特性実験と評価:バルク超伝導体応用には、交流磁界印加時のバルク体内の電磁的な振舞を明らかにすることが必要不可欠である。そこで、交流磁界印加試験を行い着磁磁界の減衰を観測するとともに、超伝導体の電流-電圧特性を考慮した有限要素法に基づく数値解析を行った。本年度は新たにバルク体の不可逆温度を考慮した電流-電圧特性を解析条件に加えた。これらの結果、バルク超伝導体の表面付近では外部交流磁界の影響を受けるため臨界電流密度より高い遮へい電流が流れ、これが熱(交流損失)の発生、温度の上昇、着磁磁界の減衰を引き起こすことが明らかとなった。 2.浮上搬送装置の基礎特性評価:本年度は、浮上・案内特性の向上を図るため、2つのバルク超伝導体を対向させたシステムについて、実験と数値シミュレーションに基づく評価を行った。その結果、永久磁石と超伝導バルク体を対向させた場合に比べ、大幅な特性向上が見込まれることがわかった。 3.リニアアクチュエータの試作・特性評価:バルク超伝導体を用いたリニア・アクチュエータの特性を明らかにすることを目的とし、両側式の短二次リニア・アクチュエータを試作した。本年度は特に着磁したバルク超伝導体をリニア・アクチュエータの二次側走行子に適用し、その両側を銅板で挟んだ構造にすることで誘導始動型のリニア同期アクチュエータとし、その特性を実験的に検証した。 4.真空断熱容器の開発:バルク超伝導応用のための真空断熱装置の開発を目指し、MSIクライオスタットの試作・特性評価を行った。同時に数値シミュレーションコードを開発し、その妥当性を検証した上で、これを用いて浮上搬送装置用クライオスタットの設計を試み、良好な結果を得た。

Research Products
(16 results)

All Other

All Publications (16 results)

[Publications] H.Ueda, H.Hayashi, A.Ishiyama, M.Tsuda: "Characteristics of active-maglev system using YBCO bulk and multiple electromagnets"Physica C. 372. 1466-1469 (2002)
[Publications] H.Shimizu, H.Ueda, M.Tsuda, A.Ishiyama: "Trapped field characteristics of Y-Ba-Cu-O bulk in time-varying external magnetic field"IEEE Transactions on Applied Superconductivity. 12. 820-823 (2002)
[Publications] S.Sadakata, H.Ueda, M.Tsuda, A.Ishiyama: "Trial production and experiment of linear actuator with double-sided primary and HTS bulk secondary"IEEE Transactions on Applied Superconductivity. 12. 824-827 (2002)
[Publications] H.Hayashi, H.Ueda, M.Tsuda, A.Ishiyama: "A new type of active-maglev system using YBCO bulk and multiple electromagnets"IEEE Transactions on Applied Superconductivity. 12. 824-827 (2002)
[Publications] Y.Teranisi, H.Ueda, M.Tsuda, A.Ishiyama: "Static and dynamic characteristics in levitating X-Y transporter using HTS bulks"IEEE Transactions on Applied Superconductivity. 12. 911-914 (2002)
[Publications] T.Akamatsu, A.Ishiyama, M.Takahashi, T.Kuriyama: "Characteristics of a cryostat using multi-shell insulation"Proc.of 19th International Cryogenic Engineering Conference (ICEC19). (to be published). (2003)
[Publications] R.Kamoshida, H.Ueda, A.Ishiyama: "A New Type of Active-Maglev System using YBCO Bulk and Multiple Electromagnets"IEEE Transactions on Applied Superconductivity. (to be published). (2003)
[Publications] T.Akamatsu, H.Ueda, A.Ishiyama: "Characteristics of Levitating X-Y Transporter using HTS Bulks"IEEE Transactions on Applied Superconductivity. (to be published). (2003)
[Publications] A.Takahashi, H.Ueda, A.Ishiyama: "Trial Production and Experiment of Linear Synchronous Actuator with Field-cooled HTS Bulk Secondary"IEEE Transactions on Applied Superconductivity. (to be published). (2003)
[Publications] H.Ueda, M.Itoh, A.Ishiyama: "Trapped Field Characteristic of HTS Bulk in AC External Magnetic Field"IEEE Transactions on Applied Superconductivity. (to be published). (2003)
[Publications] S.Wakao, A.Yamashita, Y.Fujishima, T.Yamamura: "Design optimization of electric machines based on the estimation of permeability distribution"Journal of Applied Physics. 91-10. 8302-8304 (2002)
[Publications] Y.Fujishima, S.Wakao, M.Kondo, et al.: "Design optimization of a permanent magnet synchronous motor by the response surface methodology"Journal of Applied Physics. 91-10. 8305-8307 (2002)
[Publications] Y.Fujishia, S.Wakao: "Surface Charge Analysis in Eddy Current Problems"IEEE Transactions on Magnetics. 39-3(to be published). (2003)
[Publications] Yon-Do Chun, S.Wakao, Ju Lee: "Magnetic force characteristics according to the variation of asymmetric overhang ratio in brushless direct current motor"Journal of Applied Physics. 93-10(to be published). (2003)
[Publications] 津田理, 土谷浩平, 原田直幸, 浜島高太郎: "アクティブ磁気浮上システムにおける複数のバルク超電導体配置と浮上特性"低温工学. 37-11. 681-688 (2002)
[Publications] M.Tsuda, T.Hamajima, et al.: "Lift-to-weight Ratio Dependence of Lift and Stability in Active-maglev system"IEEE Transactions on Applied superconductivity. (to be published). (2003)

2002 Fiscal Year Annual Research Report

バルク超伝導体の特性評価と応用のための基礎的研究

Principal Investigator

石山 敦士 早稲田大学, 理工学部, 教授 (00130865)

Research Products

[Publications] H.Ueda, H.Hayashi, A.Ishiyama, M.Tsuda: "Characteristics of active-maglev system using YBCO bulk and multiple electromagnets"Physica C. 372. 1466-1469 (2002)

[Publications] H.Shimizu, H.Ueda, M.Tsuda, A.Ishiyama: "Trapped field characteristics of Y-Ba-Cu-O bulk in time-varying external magnetic field"IEEE Transactions on Applied Superconductivity. 12. 820-823 (2002)

[Publications] S.Sadakata, H.Ueda, M.Tsuda, A.Ishiyama: "Trial production and experiment of linear actuator with double-sided primary and HTS bulk secondary"IEEE Transactions on Applied Superconductivity. 12. 824-827 (2002)

[Publications] H.Hayashi, H.Ueda, M.Tsuda, A.Ishiyama: "A new type of active-maglev system using YBCO bulk and multiple electromagnets"IEEE Transactions on Applied Superconductivity. 12. 824-827 (2002)

[Publications] Y.Teranisi, H.Ueda, M.Tsuda, A.Ishiyama: "Static and dynamic characteristics in levitating X-Y transporter using HTS bulks"IEEE Transactions on Applied Superconductivity. 12. 911-914 (2002)

[Publications] T.Akamatsu, A.Ishiyama, M.Takahashi, T.Kuriyama: "Characteristics of a cryostat using multi-shell insulation"Proc.of 19th International Cryogenic Engineering Conference (ICEC19). (to be published). (2003)

[Publications] R.Kamoshida, H.Ueda, A.Ishiyama: "A New Type of Active-Maglev System using YBCO Bulk and Multiple Electromagnets"IEEE Transactions on Applied Superconductivity. (to be published). (2003)

[Publications] T.Akamatsu, H.Ueda, A.Ishiyama: "Characteristics of Levitating X-Y Transporter using HTS Bulks"IEEE Transactions on Applied Superconductivity. (to be published). (2003)

[Publications] A.Takahashi, H.Ueda, A.Ishiyama: "Trial Production and Experiment of Linear Synchronous Actuator with Field-cooled HTS Bulk Secondary"IEEE Transactions on Applied Superconductivity. (to be published). (2003)

[Publications] H.Ueda, M.Itoh, A.Ishiyama: "Trapped Field Characteristic of HTS Bulk in AC External Magnetic Field"IEEE Transactions on Applied Superconductivity. (to be published). (2003)

[Publications] S.Wakao, A.Yamashita, Y.Fujishima, T.Yamamura: "Design optimization of electric machines based on the estimation of permeability distribution"Journal of Applied Physics. 91-10. 8302-8304 (2002)

[Publications] Y.Fujishima, S.Wakao, M.Kondo, et al.: "Design optimization of a permanent magnet synchronous motor by the response surface methodology"Journal of Applied Physics. 91-10. 8305-8307 (2002)

[Publications] Y.Fujishia, S.Wakao: "Surface Charge Analysis in Eddy Current Problems"IEEE Transactions on Magnetics. 39-3(to be published). (2003)

[Publications] Yon-Do Chun, S.Wakao, Ju Lee: "Magnetic force characteristics according to the variation of asymmetric overhang ratio in brushless direct current motor"Journal of Applied Physics. 93-10(to be published). (2003)

[Publications] 津田 理, 土谷浩平, 原田直幸, 浜島高太郎: "アクティブ磁気浮上システムにおける複数のバルク超電導体配置と浮上特性"低温工学. 37-11. 681-688 (2002)

[Publications] M.Tsuda, T.Hamajima, et al.: "Lift-to-weight Ratio Dependence of Lift and Stability in Active-maglev system"IEEE Transactions on Applied superconductivity. (to be published). (2003)

石山敦士早稲田大学, 理工学部, 教授 (00130865)

[Publications] 津田理, 土谷浩平, 原田直幸, 浜島高太郎: "アクティブ磁気浮上システムにおける複数のバルク超電導体配置と浮上特性"低温工学. 37-11. 681-688 (2002)