Progress of superconducting bearing technologies for flywheel energy storage systems

N. Koshizuka, F. Ishikawa, H. Nasu, Masato Murakami, K. Matsunaga, S. Saito, O. Saito, Y. Nakamura, H. Yamamoto, R. Takahata, Y. Itoh, H. Ikezawa, M. Tomita

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

We report present status of NEDO project on "Superconducting bearing technologies for flywheel energy storage systems". We fabricated a superconducting magnetic bearing module consisting of a stator of resin impregnated YBaCuO bulks and a rotor of NdFeB permanent magnet circuits. We obtained levitation force density of 8 N/cm2 at 81 K and rotation loss per levitation force of 3 mW/N at 77 K. We confirmed that both pre-loading and excess cooling methods are effective for suppressing gradual fall of rotor due to flux creep. We designed a 10 kWh class flywheel energy storage test system and investigated feasibility of active magnetic bearings for controlling rotation axis vibration under high speed rotation of the flywheel.

Original languageEnglish
Pages (from-to)444-450
Number of pages7
JournalPhysica C: Superconductivity and its Applications
Volume386
DOIs
Publication statusPublished - 2003 Apr 15
Externally publishedYes

Fingerprint

Bearings (structural)
flywheels
Flywheels
energy storage
Energy storage
magnetic bearings
Magnetic bearings
levitation
rotors
Rotors
stators
permanent magnets
resins
Stators
Permanent magnets
Creep
Resins
modules
high speed
Fluxes

Keywords

  • Active magnetic bearing
  • Flywheel energy storage system
  • Levitation force
  • Rotation loss
  • Superconducting magnetic bearing

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Progress of superconducting bearing technologies for flywheel energy storage systems. / Koshizuka, N.; Ishikawa, F.; Nasu, H.; Murakami, Masato; Matsunaga, K.; Saito, S.; Saito, O.; Nakamura, Y.; Yamamoto, H.; Takahata, R.; Itoh, Y.; Ikezawa, H.; Tomita, M.

In: Physica C: Superconductivity and its Applications, Vol. 386, 15.04.2003, p. 444-450.

Research output: Contribution to journalArticle

Koshizuka, N, Ishikawa, F, Nasu, H, Murakami, M, Matsunaga, K, Saito, S, Saito, O, Nakamura, Y, Yamamoto, H, Takahata, R, Itoh, Y, Ikezawa, H & Tomita, M 2003, 'Progress of superconducting bearing technologies for flywheel energy storage systems', Physica C: Superconductivity and its Applications, vol. 386, pp. 444-450. https://doi.org/10.1016/S0921-4534(02)02206-2
Koshizuka, N. ; Ishikawa, F. ; Nasu, H. ; Murakami, Masato ; Matsunaga, K. ; Saito, S. ; Saito, O. ; Nakamura, Y. ; Yamamoto, H. ; Takahata, R. ; Itoh, Y. ; Ikezawa, H. ; Tomita, M. / Progress of superconducting bearing technologies for flywheel energy storage systems. In: Physica C: Superconductivity and its Applications. 2003 ; Vol. 386. pp. 444-450.
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AU - Saito, O.

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