1998 Fiscal Year Final Research Report Summary

Studies on high Tc superconductors for power transmission line

Research Project

Project/Area Number	08044136
Research Category	Grant-in-Aid for international Scientific Research
Allocation Type	Single-year Grants
Section	Joint Research
Research Field	Electronic materials/Electric materials
Research Institution	Yokohama National University
Principal Investigator	SUGAHARA M. Yokohama National Uniuersity, Faculty of Eng., Professor, 工学部, 教授 (40017900)
Co-Investigator(Kenkyū-buntansha)	AMEMIYA N. Yokohama National University, Faculty of Eng., Asociate Professor, 工学部, 助教授 (10222697) CAMPBELL Archie IRC in Superconductivity, Univ. of Cambridge, Leader, Director of IRC., 超伝導学際研究センタ, 副所長 CARDWELL David IRC in Superconductivity, Univ. of Cambridge, Assistant Director of Research, 超伝導学際研究センタ, 副研究部長 GLOWACKI Bartek IRC in Superconductivity, Univ. of Cambridge, Assistant Director of Research, 超伝導学際研究センタ, 副研究部長 TSUKAMOTO O. Yokohama National University, Faculty of Eng., Professor, 工学部, 教授 (30017975)
Project Period (FY)	1996 – 1998
Keywords	High temperature superconductor / AC loss / Multifilament wire / AC transport current loss / Assembled conductor / Bi silver sheathed tape / Tape conductor
Research Abstract	High efficiency and I or compact power transmission lines can be realized by the application of high Tc superconductors. The reduction of their AC losses is a key issue for the application of high Tc superconductors to power transmission lines. In this work, AC losses of HTS tapes and assembled conductors were measured and their electromagnetic phenomena were studied to reduce their AC losses. The transport loss measurement of HTS tape revealed the influence of n-value and critical current density profile in the wire cross section on the transport loss. The transport loss decreases with increasing n-value and increasing critical current density in the peripheral region of the tape. The measured magnetization losses agree well with the numerical results. The total AC loss of HTS tapes carrying AC transport current in the AC external magnetic field was calculated by the finite element method. The total AC loss of twisted multifilamentary tapes can be minimized by the optimization of their twist pitch. The optimum twist pitch is around 10 mm. The AC loss of a conductor assembled with eight HTS tapes was measured. The influence of the adjacent tapes on the AC loss was studied. The AC loss in a tape in assembled conductor is smaller than the AC loss in a single tape.

Research Products
(38 results)

All Other

All Publications (38 results)

[Publications] M.Sugahara: "Anomalous Hysteretic Dielectric Polarization in C-Axis-Oriented La2-xSrxCuO4 Film" Advances in Superconductivity. 1. 115-118 (1998)
- Description
  「研究成果報告書概要(和文)」より
[Publications] M.Sugahara: "Theory and Experimental Evidence for Pair FQHE State Caused by Zero-Point Harmonic Oscillation in Block-Layer Potential" Symmetry and Pairing in Superconductors. 395-403 (1998)
- Description
  「研究成果報告書概要(和文)」より
[Publications] M.Sugahara: "Experimental Evidence of Pairing FQHE State in HTS Caused by//c Zero-Point Oscillation in CuO2 Layer" to be published in Physica. (1999)
- Description
  「研究成果報告書概要(和文)」より
[Publications] M.Sugahara: "Anomalous Quantum Resonance Found in Field-Effect Device Induced by Laser Irradiation" to be published in the Proceedings of World Ceramic Congress and Forum on New Materials. (1999)
- Description
  「研究成果報告書概要(和文)」より
[Publications] M.Sugahara: "Anomalous Fractional x Dependence of Dielectric Property of c-axis Oriented Film" to be published in the Proceedings of World Ceramic Congress and Forum on New Materials. (1999)
- Description
  「研究成果報告書概要(和文)」より
[Publications] M.Sugahara: "Film Thickness Dependence of Anomalous Dielectric Property Found in C-Axis Oriented La2-xSrxCuO4 Film with Localization" to be published in Proceedings of 11th Internationl Symposium on Superconductivity. (1999)
- Description
  「研究成果報告書概要(和文)」より
[Publications] O.Tsukamoto: "Dependence of AC transport Current Losses of HTS wires on Their Structures and Synthesizing Processes" To be published in IEEE Trans.on ASC. (1999)
- Description
  「研究成果報告書概要(和文)」より
[Publications] D.Miyagi: "Influence of DC external magnetic field on AC transport current loss of HTS tape" Physica C : Superconductivity. 310. 90-94 (1999)
- Description
  「研究成果報告書概要(和文)」より
[Publications] O.Tsukamoto: "AC transport current loss of assembled conductor of HTS tapes" Physica C : Superconductivity. 310. 197-201 (1999)
- Description
  「研究成果報告書概要(和文)」より
[Publications] Y.Kito: "AC Transport Current Loss of High Temperature Superconducting Tapes in Single Layer Arrangements" Proceeding of MT-15. 1214-1217 (1998)
- Description
  「研究成果報告書概要(和文)」より
[Publications] A.M Campbell: "Ac losses in high temperature superconducting tapes" IRC Research Review. 160-167 (1998)
- Description
  「研究成果報告書概要(和文)」より
[Publications] E.C.L.Chesneau: "Comparison of magnetic field profiles of Ag/BSCCO-2223 tapes carrying ac and dc currents" To be published in IEEE Trans.Appled Super.9. (1999)
- Description
  「研究成果報告書概要(和文)」より
[Publications] M.Majoros: "Ac losses in BiPbSrCaCuO-2223/Ag multifilamentary tapes in conditions similar to those in superconducting transmission lines" Physica C : Superconductivity. 310. 95-100 (1998)
- Description
  「研究成果報告書概要(和文)」より
[Publications] M.Majoros: "Temperature dependence of transport multifilamentary ac losses in tapes Bi-2223/Ag" Physica C : Superconductivity. 310. 6-11 (1998)
- Description
  「研究成果報告書概要(和文)」より
[Publications] M.Ciszek: "Angular dependence of ac transport in multifilamentary Bi-2223/Ag tape in external dc magnetic field" paper presented at 1998 Applied Superconductivity Conference. 13-18 (1998)
- Description
  「研究成果報告書概要(和文)」より
[Publications] M.Ciszek: "Angular dependence of ac self-field energy losses in multifilamentary Ag/Bi-2223 tape in external DC magnetic field" Proceedings of 59th Meeting on Cryogenics and Superconductivity. E2-9. 170 (1998)
- Description
  「研究成果報告書概要(和文)」より
[Publications] M.Ciszek: "Energy dissipation in multifilamentary Ag/BSCCO-2223 tape cased by ac external magnetic field and transport current" Proceedings of ISS'98. (1998)
- Description
  「研究成果報告書概要(和文)」より
[Publications] N.Amemiya: "Numerical modelings of superconducting wires for AC loss calculations" Physica C : Superconductivity. 310. 16-29 (1998)
- Description
  「研究成果報告書概要(和文)」より
[Publications] N.Amemiya: "Finite element analysis of AC loss in non-twisted Bi-2223 tape carrying AC transport current and/or exposed to DC or AC external magnetic field" Physica C : Superconductivity. 310. 30-35 (1998)
- Description
  「研究成果報告書概要(和文)」より
[Publications] M.Sugahara: "Anomalous Hysteretic Dielectric Polarization in C-Axis-Oriented La2-xSrxCuO4 Film" Advances in Superconductivity. Vol.1. 115-118 (1998)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] M.Sugahara: "Theory and Experimental Evidence for Pair FQHE State Caused by Zero-Point Harmonic Oscillation in Block-Layer Potential" Symmetry and Pairing in Superconductors. 395-403 (1999)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] M.Sugahara: "Experimental Evidence of Pairing FQHE State in HTS Caused by //c Zero-Point Oscillation in CuO2 Layer" to be published in Physica (special issue of Conference on Anomalous Complex Superconductors, 1998, Crete, Greece).
- Description
  「研究成果報告書概要(欧文)」より
[Publications] M.Sugahara: "Anomalous Quantum Resonance Found in Field-Effect Device Induced by Laser Irradiation" to be published in the Proceedings of World Ceramic Congress and Forum on New Materials (CIMTEC'98) , Firenze, 1998.
- Description
  「研究成果報告書概要(欧文)」より
[Publications] M.Sugahara: "Anomalous Fractional x Dependence of Dielectric Property of c-axis Oriented Film" to be published in the Proceedings of World Ceramic Congress and Forum on New Materials (CIMTEC'98), Firenze, 1998.
- Description
  「研究成果報告書概要(欧文)」より
[Publications] M.Sugahara: "Film Thickness Dependence of Anomalous Dielectric Property Found in C-Axis Oriented La2-xSrxCuO4 Film with Localization" to be published in Proceedings of 11th Internationl Symposium on Superconductivity (ISS'98) , Fukuoka, 1998.
- Description
  「研究成果報告書概要(欧文)」より
[Publications] O.Tsukamoto, S.Ishii, Y.Kito, S.Fukui, H.Mukai, J.Fujikami, K.Sato: ""AC transport current loss of assembled conductor of HTS tapes"" Physica C. 310. 197-201 (1998)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] O.Tsukamoto, D.Miyagi, S.Ishii, N.Amemiya, O.Kasuu, H.Ii, K.Takeda, M.Shibuya: ""Dependence of AC transport Current Losses of HTS wires on Their Structures and Synthesizing Processes"" Presented at ASC. (1998)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] D.Miyagi, O.Tsukamoto, N.Amemiya, H.Mukai, J.Fujikami, K.Hayashi and K.Sato: ""Influence of DC external magnetic field on AC transport current loss of HTS tape"" Physica C. 310. 90-94 (1998)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] Y.Kito, O.Tsukamoto, S.Fukui: ""AC Transport Current Loss of High Temperature Superconducting Tapes in Single Layer Arrangements"" MT-15 Proceeding. 1214-1217 (1998)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] N.Amemiya: "Numerical modelings of superconducting wires for AC loss calculations" Physica C : Superconductivity (Elsevier Science). Vol.310, No.1-4. 16-29 (1998)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] N.Amemiya: "Finite element analysis of AC loss in non-twisted Bi-2223 tape carrying AC transport current and/or exposed to DC or AC external magnetic field" Physica C : Superconductivity (Elsevier Science). Vol.310, No.1-4. 30-35 (1998)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] M.Majoros: "Temperature dependence of transport multifilamentary ac losses in tapes Bi-2223/Ag" Physica C. 310. 6-11 (1998)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] M.Majoros: "Ac losses in BiPbSrCaCuO-2223/Ag multifilamentary tapes in conditions similar to those in superconducting transmission lines" Physica C. 310. 95-100 (1998)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] A.M Campbell: "Ac losses in high temperature superconducting tapes" IRC Research Review. 160-167 (1998)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] E.C.L.Chesneau: "Comparison of magnetic field profiles of Ag/BSCCO-2223 tapes carrying ac and dc currents" to be published on IEEE Trans.Appled Superconductivity 9,1999.
- Description
  「研究成果報告書概要(欧文)」より
[Publications] M.Ciszek: "Angular dependence of ac transport losses in multifilamentary Bi-2223/Ag tape in external dc magnetic field" paper presented at 1998 Applied Superconductivity Conference, Spring Palm Desert, USA,13-18 September, 1998.
- Description
  「研究成果報告書概要(欧文)」より
[Publications] M.Ciszek: "Angular dependence of ac self-field energy losses in multifilamentary Ag/Bi-2223 tape in external DC magnetic field" Proceedings of 59th Meeting on Cryogenics and Superconductivity. E2-9. 170 (1998)
- Description
  「研究成果報告書概要(欧文)」より
[Publications] M.Ciszek: "Energy dissipation in multifilamentary Ag/BSCCO-2223 tape cased by ac external magnetic field and transport current" to be published on Adv.in Superconductivity, 1999.
- Description
  「研究成果報告書概要(欧文)」より

1998 Fiscal Year Final Research Report Summary

Studies on high Tc superconductors for power transmission line

Principal Investigator

SUGAHARA M. Yokohama National Uniuersity, Faculty of Eng., Professor, 工学部, 教授 (40017900)

Research Products

[Publications] M.Sugahara: "Anomalous Hysteretic Dielectric Polarization in C-Axis-Oriented La2-xSrxCuO4 Film" Advances in Superconductivity. 1. 115-118 (1998)

Description

[Publications] M.Sugahara: "Theory and Experimental Evidence for Pair FQHE State Caused by Zero-Point Harmonic Oscillation in Block-Layer Potential" Symmetry and Pairing in Superconductors. 395-403 (1998)

Description

[Publications] M.Sugahara: "Experimental Evidence of Pairing FQHE State in HTS Caused by//c Zero-Point Oscillation in CuO2 Layer" to be published in Physica. (1999)

Description

[Publications] M.Sugahara: "Anomalous Quantum Resonance Found in Field-Effect Device Induced by Laser Irradiation" to be published in the Proceedings of World Ceramic Congress and Forum on New Materials. (1999)

Description

[Publications] M.Sugahara: "Anomalous Fractional x Dependence of Dielectric Property of c-axis Oriented Film" to be published in the Proceedings of World Ceramic Congress and Forum on New Materials. (1999)

Description

[Publications] M.Sugahara: "Film Thickness Dependence of Anomalous Dielectric Property Found in C-Axis Oriented La2-xSrxCuO4 Film with Localization" to be published in Proceedings of 11th Internationl Symposium on Superconductivity. (1999)

Description

[Publications] O.Tsukamoto: "Dependence of AC transport Current Losses of HTS wires on Their Structures and Synthesizing Processes" To be published in IEEE Trans.on ASC. (1999)

Description

[Publications] D.Miyagi: "Influence of DC external magnetic field on AC transport current loss of HTS tape" Physica C : Superconductivity. 310. 90-94 (1999)

Description

[Publications] O.Tsukamoto: "AC transport current loss of assembled conductor of HTS tapes" Physica C : Superconductivity. 310. 197-201 (1999)

Description

[Publications] Y.Kito: "AC Transport Current Loss of High Temperature Superconducting Tapes in Single Layer Arrangements" Proceeding of MT-15. 1214-1217 (1998)

Description

[Publications] A.M Campbell: "Ac losses in high temperature superconducting tapes" IRC Research Review. 160-167 (1998)

Description

[Publications] E.C.L.Chesneau: "Comparison of magnetic field profiles of Ag/BSCCO-2223 tapes carrying ac and dc currents" To be published in IEEE Trans.Appled Super.9. (1999)

Description

[Publications] M.Majoros: "Ac losses in BiPbSrCaCuO-2223/Ag multifilamentary tapes in conditions similar to those in superconducting transmission lines" Physica C : Superconductivity. 310. 95-100 (1998)

Description

[Publications] M.Majoros: "Temperature dependence of transport multifilamentary ac losses in tapes Bi-2223/Ag" Physica C : Superconductivity. 310. 6-11 (1998)

Description

[Publications] M.Ciszek: "Angular dependence of ac transport in multifilamentary Bi-2223/Ag tape in external dc magnetic field" paper presented at 1998 Applied Superconductivity Conference. 13-18 (1998)

Description

[Publications] M.Ciszek: "Angular dependence of ac self-field energy losses in multifilamentary Ag/Bi-2223 tape in external DC magnetic field" Proceedings of 59th Meeting on Cryogenics and Superconductivity. E2-9. 170 (1998)

Description

[Publications] M.Ciszek: "Energy dissipation in multifilamentary Ag/BSCCO-2223 tape cased by ac external magnetic field and transport current" Proceedings of ISS'98. (1998)

Description

[Publications] N.Amemiya: "Numerical modelings of superconducting wires for AC loss calculations" Physica C : Superconductivity. 310. 16-29 (1998)

Description

[Publications] N.Amemiya: "Finite element analysis of AC loss in non-twisted Bi-2223 tape carrying AC transport current and/or exposed to DC or AC external magnetic field" Physica C : Superconductivity. 310. 30-35 (1998)

Description

[Publications] M.Sugahara: "Anomalous Hysteretic Dielectric Polarization in C-Axis-Oriented La2-xSrxCuO4 Film" Advances in Superconductivity. Vol.1. 115-118 (1998)

Description

[Publications] M.Sugahara: "Theory and Experimental Evidence for Pair FQHE State Caused by Zero-Point Harmonic Oscillation in Block-Layer Potential" Symmetry and Pairing in Superconductors. 395-403 (1999)

Description

[Publications] M.Sugahara: "Experimental Evidence of Pairing FQHE State in HTS Caused by //c Zero-Point Oscillation in CuO2 Layer" to be published in Physica (special issue of Conference on Anomalous Complex Superconductors, 1998, Crete, Greece).

Description

[Publications] M.Sugahara: "Anomalous Quantum Resonance Found in Field-Effect Device Induced by Laser Irradiation" to be published in the Proceedings of World Ceramic Congress and Forum on New Materials (CIMTEC'98) , Firenze, 1998.

Description

[Publications] M.Sugahara: "Anomalous Fractional x Dependence of Dielectric Property of c-axis Oriented Film" to be published in the Proceedings of World Ceramic Congress and Forum on New Materials (CIMTEC'98), Firenze, 1998.

Description

[Publications] M.Sugahara: "Film Thickness Dependence of Anomalous Dielectric Property Found in C-Axis Oriented La2-xSrxCuO4 Film with Localization" to be published in Proceedings of 11th Internationl Symposium on Superconductivity (ISS'98) , Fukuoka, 1998.

Description

[Publications] O.Tsukamoto, S.Ishii, Y.Kito, S.Fukui, H.Mukai, J.Fujikami, K.Sato: ""AC transport current loss of assembled conductor of HTS tapes"" Physica C. 310. 197-201 (1998)

Description

[Publications] O.Tsukamoto, D.Miyagi, S.Ishii, N.Amemiya, O.Kasuu, H.Ii, K.Takeda, M.Shibuya: ""Dependence of AC transport Current Losses of HTS wires on Their Structures and Synthesizing Processes"" Presented at ASC. (1998)

Description

[Publications] D.Miyagi, O.Tsukamoto, N.Amemiya, H.Mukai, J.Fujikami, K.Hayashi and K.Sato: ""Influence of DC external magnetic field on AC transport current loss of HTS tape"" Physica C. 310. 90-94 (1998)

Description

[Publications] Y.Kito, O.Tsukamoto, S.Fukui: ""AC Transport Current Loss of High Temperature Superconducting Tapes in Single Layer Arrangements"" MT-15 Proceeding. 1214-1217 (1998)

Description

[Publications] N.Amemiya: "Numerical modelings of superconducting wires for AC loss calculations" Physica C : Superconductivity (Elsevier Science). Vol.310, No.1-4. 16-29 (1998)

Description

[Publications] N.Amemiya: "Finite element analysis of AC loss in non-twisted Bi-2223 tape carrying AC transport current and/or exposed to DC or AC external magnetic field" Physica C : Superconductivity (Elsevier Science). Vol.310, No.1-4. 30-35 (1998)

Description

[Publications] M.Majoros: "Temperature dependence of transport multifilamentary ac losses in tapes Bi-2223/Ag" Physica C. 310. 6-11 (1998)

Description

[Publications] M.Majoros: "Ac losses in BiPbSrCaCuO-2223/Ag multifilamentary tapes in conditions similar to those in superconducting transmission lines" Physica C. 310. 95-100 (1998)

Description

[Publications] A.M Campbell: "Ac losses in high temperature superconducting tapes" IRC Research Review. 160-167 (1998)

Description

[Publications] E.C.L.Chesneau: "Comparison of magnetic field profiles of Ag/BSCCO-2223 tapes carrying ac and dc currents" to be published on IEEE Trans.Appled Superconductivity 9,1999.

Description

[Publications] M.Ciszek: "Angular dependence of ac transport losses in multifilamentary Bi-2223/Ag tape in external dc magnetic field" paper presented at 1998 Applied Superconductivity Conference, Spring Palm Desert, USA,13-18 September, 1998.

Description

[Publications] M.Ciszek: "Angular dependence of ac self-field energy losses in multifilamentary Ag/Bi-2223 tape in external DC magnetic field" Proceedings of 59th Meeting on Cryogenics and Superconductivity. E2-9. 170 (1998)

Description

[Publications] M.Ciszek: "Energy dissipation in multifilamentary Ag/BSCCO-2223 tape cased by ac external magnetic field and transport current" to be published on Adv.in Superconductivity, 1999.