High temperature superconducting quasi-permanent magnets and their application to superconducting motor

Tetsuo Oka, Yoshitaka Itoh, Yousuke Yanagi, Masaaki Yoshikawa, Tsutomu Sakakibara, Shintaro Harada, Yuh Yamada, Uichiro Mizutani

研究成果: Article

3 引用 (Scopus)

抜粋

We succeeded in obtaining Y-Ba-Cu-O superconducting bulk magnets (abbreviated as Supermagnets) which can trap the magnetic fields exceeding those of ordinary permanent magnets. The flux motion during the pulsed field magnetization (PFM) was evaluated at 77 K. The flux penetration into the sample is sluggish when the field is low, but it suddenly penetrates when the external field exceeds 1.5 T. The PFM technique was applied at temperatures below 77 K to magnetize Supermagnets. The highest flux density of 2.1 T was achieved at the surface of the sample when magnetized by PFM at 30 K by using a cryocooler. A superconducting motor was constructed for the first time in the world by using Supermagnets as field magnets. The motor performances at 77 K and 65 K reached the values of 2 kW and 3.5 kW, respectively. We have technically established that Supermagnets can be used in various practical applications.

元の言語English
ページ(範囲)931-936
ページ数6
ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
61
発行部数9
DOI
出版物ステータスPublished - 1997

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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