Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 931-936 |
| Number of pages | 6 |
| Journal | Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals |
| Volume | 61 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1997 Jan 1 |
| Externally published | Yes |
Fingerprint
Keywords
- Melt-textured growth processing
- Pulsed field magnetization
- Quasi-permanent magnet
- Superconducting motor
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry
Cite this
High temperature superconducting quasi-permanent magnets and their application to superconducting motor. / Oka, Tetsuo; Itoh, Yoshitaka; Yanagi, Yousuke; Yoshikawa, Masaaki; Sakakibara, Tsutomu; Harada, Shintaro; Yamada, Yuh; Mizutani, Uichiro.
In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 61, No. 9, 01.01.1997, p. 931-936.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - High temperature superconducting quasi-permanent magnets and their application to superconducting motor
AU - Oka, Tetsuo
AU - Itoh, Yoshitaka
AU - Yanagi, Yousuke
AU - Yoshikawa, Masaaki
AU - Sakakibara, Tsutomu
AU - Harada, Shintaro
AU - Yamada, Yuh
AU - Mizutani, Uichiro
PY - 1997/1/1
Y1 - 1997/1/1
N2 - 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.
AB - 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.
KW - Melt-textured growth processing
KW - Pulsed field magnetization
KW - Quasi-permanent magnet
KW - Superconducting motor
UR - http://www.scopus.com/inward/record.url?scp=0031224181&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031224181&partnerID=8YFLogxK
U2 - 10.2320/jinstmet1952.61.9_931
DO - 10.2320/jinstmet1952.61.9_931
M3 - Article
VL - 61
SP - 931
EP - 936
JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
SN - 0021-4876
IS - 9
ER -