高温超電導フライホイールの回転損失に関する基礎的研究

• 上坂 充

  東京大学工学部附属原子力工学研究施設

• 竹下 明

  東京大学工学部附属原子力工学研究施設

• 吉田 義勝

  東京大学工学部附属原子力工学研究施設

• 宮 健三

  東京大学工学部附属原子力工学研究施設

書誌事項

タイトル別名

• Fundamental Study on Rotational Loss in High Tc Superconducting Flywheel.

抄録

High T_c melt-processed YBaCuO bulk superconductors have been utilized for the development of high T_c superconducting magnetic flywheel and bearing. In such systems, the superconductors suffer an A.C. magnetic field with frequencies of from tens Hz through several kHz during the rotation of a rotor where permanent magnet rings are installed. The A.C. magnetic field is caused by the inhomogeneity of the magnetic field generated by the magnet in the azimuthal direction. Here, the decay of a rotational speed induced by the A.C. magnetic field, termed rotational loss, becomes one of the most serious technical problems. We analyzed the A.C. magnetic properties of high T_c superconductors in the above frequency range using a fundamental experiment and numerical simulation based on the flux flow·creep model and the vortex-liquid model. Finally, we elucidate that the motion of the fluxoids and the resultant energy dissipation is dominant in the rotational loss.

収録刊行物

• 低温工学

  低温工学 30 (11), 502-509, 1995

  公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)

キーワード

• high <i>T</i>_c superconducting flywheel
• A.C. magnetic property
• flux flow·creep model
• vortex-liquid model

詳細情報

• CRID: 1390001204612707584
• NII論文ID: 10001625747
• NII書誌ID: AN00333419
• DOI: 10.2221/jcsj.30.502
• ISSN: 18800408
• ISSN: 03892441
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可