Progress of superconducting bearing technologies for flywheel energy storage systems

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

doi:10.1016/S0921-4534(02)02206-2

Progress of superconducting bearing technologies for flywheel energy storage systems

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

Research output: Contribution to journal › Conference article › peer-review

48 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 language	English
Pages (from-to)	444-450
Number of pages	7
Journal	Physica C: Superconductivity and its applications
Volume	386
DOIs	https://doi.org/10.1016/S0921-4534(02)02206-2
Publication status	Published - 2003 Apr 15
Externally published	Yes
Event	ICMC 2002 - Xi an, China Duration: 2002 Jun 16 → 2002 Jun 20

Keywords

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

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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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, 386, 444-450. https://doi.org/10.1016/S0921-4534(02)02206-2

Progress of superconducting bearing technologies for flywheel energy storage systems. / 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.

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

Research output: Contribution to journal › Conference article › peer-review

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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.",

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

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AU - Koshizuka, N.

AU - Ishikawa, F.

AU - Nasu, H.

AU - Murakami, M.

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.

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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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SP - 444

EP - 450

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

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