Pulsed Field Magnetization Properties of Bulk RE-Ba-Cu-O as Pole-Field Magnets for HTS Rotating Machines

Aiming at exploiting the high trapped field ability of bulk high-temperature RE-Ba-Cu-O (RE: rare-earth elements) superconductors, a brushless axial-gap type superconducting synchronous motor has been successfully developed as a technology demonstrator using eight melt-textured GdBa 2 Cu 3 O y (Gd-1...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2011-06, Vol.21 (3), p.1180-1184
Main Authors: Zigang Deng, Miki, M, Tsuzuki, K, Felder, B, Taguchi, R, Shinohara, N, Izumi, M
Format: Article
Language:English
Subjects:
Applied sciences
Coils
Electrical engineering. Electrical power engineering
Electrical machines
Electromagnets
Exact sciences and technology
High temperature superconductors
Magnetic levitation
Miscellaneous
pole-field magnets
pulsed field magnetization
rotating machines
Shape
Special rotating machines
Superconducting magnets
Synchronous motors
Temperature measurement
trapped field
Various equipment and components
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Aiming at exploiting the high trapped field ability of bulk high-temperature RE-Ba-Cu-O (RE: rare-earth elements) superconductors, a brushless axial-gap type superconducting synchronous motor has been successfully developed as a technology demonstrator using eight melt-textured GdBa 2 Cu 3 O y (Gd-123) bulks as pole-field magnets. An output power of 10 kW at 720 rpm was realized by an average trapped field peak of 0.56 T reaching the armature coils, under a pulsed field excitation at the liquid nitrogen temperature. For such motors, to improve the trapped flux of bulks is a direct way to enhance the motor performance. In order to obtain a high trapped flux density with a regular shape for a high performance motor utilization, the pulsed field magnetization (PFM) properties of two kinds of bulk superconductors have been investigated. By a reasonable multi-PFM process with a pair of vortex-type pulsed coils, it was found that the multi-seed Y-Ba-Cu-O bulk can bring a high average trapped field, while the single-grain Gd-Ba-Cu-O bulk under a size-adjustable pulsed coil can obtain a very regular trapped field distribution. These results will be useful to the following optimization of the rotating machine system.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2010.2085071