DocumentCode :
837452
Title :
Cryo-permanent magnets-geometry, magnetization and cost issues
Author :
Sander, Michael
Volume :
15
Issue :
2
fYear :
2005
fDate :
6/1/2005 12:00:00 AM
Firstpage :
1431
Lastpage :
1434
Abstract :
High trapped peak magnetic fields obtained for melt-textured 123-high-temperature superconductor (HTS) bulk cylinders, make these materials highly attractive for cryo-permanent magnets (CPMs). However, to transfer the proven performances of HTS materials into practical magnetic devices with magnetizations of ≤5 T over ≥10 cm size, issues related to geometry, magnetization and cost have to be addressed. HTS ring structures appear to be more adequate than just cylindrical bulk parts but the demands for growing, shaping and assembling the HTS materials increase. A novel process is introduced to in-situ magnetize the HTS ring using pulsed copper coils. It involves the injection of an extra current which is induced by the magnetizing pulse field. This allows flux penetration into otherwise strongly shielded rings, and thus reduces the required peak magnetic field. Concepts for "medium-size" assembled structures and results of model calculations for corresponding magnetization processes are presented. Preliminary cost comparisons with winding-based solutions are given as well.
Keywords :
high-temperature superconductors; magnetisation; permanent magnets; superconducting magnets; HTS ring; cost issues; cryo-permanent magnets; flux penetration; high trapped peak magnetic fields; high-temperature superconductor; in-situ magnetization; magnetization processes; magnetizing pulse field; pulsed copper coils; strongly shielded rings; superconducting magnets; Assembly; Costs; High temperature superconductors; Magnetic fields; Magnetic flux; Magnetic materials; Magnetic shielding; Magnetization; Superconducting magnets; Superconducting materials; High-temperature superconductors; magnetization processes; magnets; superconducting magnets;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2005.849115
Filename :
1439912
Link To Document :
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