300 Wh class superconductor flywheel energy storage system with a horizontal axle

Tae-Hyun Sung, J. S. Lee, Y. H. Han, S. C. Han, S. K. Choi, S. J. Kim

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

A 300 Wh class flywheel energy storage system using high Tc superconductor bearings (HTC SFES) has been under development. The HTC SFES running in a vacuum chamber mainly consists of a composite flywheel rotor, superconductor bearings, a motor/generator and its controller. The present HTC SFES was designed to have maximum operating speed of 33,000 rpm, which is way above two rigid body mode critical speeds of 638 and 1311 rpm. It has been experimentally verified that the system can run smoothly up to 20,000 rpm. The coreless Halbach magnet array motor & generator has also been proven to be effective on transferring electrical energy to the rotating composite flywheel in kinetic form. Rotor-dynamic analyses were performed and compared with experimental results of HTC SFES with a horizontal axle.

Original languageEnglish
Pages (from-to)1451-1456
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume372-376
Issue numberPART 3
DOIs
StatePublished - 2002 Aug 1

Keywords

  • Flywheel energy storage system
  • Magnetic levitation
  • Rotor-dynamic analysis
  • Superconductor bearing

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