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Superconducting magnetic bearing for a flywheel energy storage system using superconducting coils and bulk superconductors
- Source :
- Physica C: Superconductivity. 469:1244-1249
- Publication Year :
- 2009
- Publisher :
- Elsevier BV, 2009.
-
Abstract
- Stable levitation or suspension of a heavy object in mid-air can be realized using a combination of a permanent magnet and a bulk superconductor with high critical current density, in that the force density has reached 100 kN/m 2 . The superconducting flywheel system for energy storage is attractive due to a great reduction in the rotational loss of the bearings. So long as a permanent magnet is used as a magnetic source, however, the electromagnetic force (EMF) is essentially limited by its field strength. In order to overcome such a limitation, we employed a superconducting coil/magnet as a magnetic source and studied the EMF characteristics of bulk superconductors in high-magnetic fields. We also measured the EMF between a bulk superconductor and a specially designed superconducting coil having a high field gradient, and confirmed that the EMF reached 9450 N (force density: 2507 kN/m 2 ).
- Subjects :
- Physics
Force density
Condensed matter physics
Energy Engineering and Power Technology
Magnetic bearing
Superconducting magnet
Superconducting magnetic energy storage
Condensed Matter Physics
Flywheel
Electronic, Optical and Magnetic Materials
Electromagnetic coil
Condensed Matter::Superconductivity
Magnet
Levitation
Electrical and Electronic Engineering
Subjects
Details
- ISSN :
- 09214534
- Volume :
- 469
- Database :
- OpenAIRE
- Journal :
- Physica C: Superconductivity
- Accession number :
- edsair.doi...........4f2ade878ddc77480d8a9c406a48b2a5