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

研究成果: Article

43 引用 (Scopus)

抄録

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.

元の言語English
ページ(範囲)444-450
ページ数7
ジャーナルPhysica C: Superconductivity and its Applications
386
DOI
出版物ステータスPublished - 2003 4 15
外部発表Yes

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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

ASJC Scopus subject areas

  • Condensed Matter Physics

これを引用

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.

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

研究成果: Article

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, 巻. 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. :: Physica C: Superconductivity and its Applications. 2003 ; 巻 386. pp. 444-450.
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AU - Koshizuka, N.

AU - Ishikawa, F.

AU - Nasu, H.

AU - Murakami, Masato

AU - Matsunaga, K.

AU - Saito, S.

AU - Saito, O.

AU - Nakamura, Y.

AU - Yamamoto, H.

AU - Takahata, R.

AU - Itoh, Y.

AU - Ikezawa, H.

AU - Tomita, M.

PY - 2003/4/15

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N2 - 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.

AB - 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.

KW - Active magnetic bearing

KW - Flywheel energy storage system

KW - Levitation force

KW - Rotation loss

KW - Superconducting magnetic bearing

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