Present status of R & D on superconducting magnetic bearing technologies for flywheel energy storage system

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

doi:10.1016/S0921-4534(02)01374-6

Present status of R & D on superconducting magnetic bearing technologies for flywheel energy storage system

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

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

We report on the NEDO project of superconducting magnetic bearing (SMB) technologies for flywheel energy storage system. We fabricated SMB modules which consist of a stator of roof-tile shape YBaCuO bulks and a NdFeB permanent magnet circuit. The levitation force density of the bearings was 9 N/cm². It was confirmed that pre-loading and excess cooling methods are both effective for suppressing the gradual fall of rotor due to flux creep. We designed a basic concept of 10 kWh class flywheel energy storage system and investigated the feasibility of active magnetic bearings for the 10 kWh system. We also examined the fabrication condition of CFRP flywheels for the system.

Original language	English
Pages (from-to)	11-17
Number of pages	7
Journal	Physica C: Superconductivity and its applications
Volume	378-381
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(02)01374-6
Publication status	Published - 2002 Oct 1
Externally published	Yes

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., Oka, T., Ikezawa, H., & Tomita, M. (2002). Present status of R & D on superconducting magnetic bearing technologies for flywheel energy storage system. Physica C: Superconductivity and its applications, 378-381(PART 1), 11-17. https://doi.org/10.1016/S0921-4534(02)01374-6

Present status of R & D on superconducting magnetic bearing technologies for flywheel energy storage system. / Koshizuka, N.; Ishikawa, F.; Nasu, H.; Murakami, M.; Matsunaga, K.; Saito, S.; Saito, O.; Nakamura, Y.; Yamamoto, H.; Takahata, R.; Oka, T.; Ikezawa, H.; Tomita, M.

In: Physica C: Superconductivity and its applications, Vol. 378-381, No. PART 1, 01.10.2002, p. 11-17.

Research output: Contribution to journal › Article › peer-review

Koshizuka, N, Ishikawa, F, Nasu, H, Murakami, M, Matsunaga, K, Saito, S, Saito, O, Nakamura, Y, Yamamoto, H, Takahata, R, Oka, T, Ikezawa, H & Tomita, M 2002, 'Present status of R & D on superconducting magnetic bearing technologies for flywheel energy storage system', Physica C: Superconductivity and its applications, vol. 378-381, no. PART 1, pp. 11-17. https://doi.org/10.1016/S0921-4534(02)01374-6

Koshizuka, N. ; Ishikawa, F. ; Nasu, H. ; Murakami, M. ; Matsunaga, K. ; Saito, S. ; Saito, O. ; Nakamura, Y. ; Yamamoto, H. ; Takahata, R. ; Oka, T. ; Ikezawa, H. ; Tomita, M. / Present status of R & D on superconducting magnetic bearing technologies for flywheel energy storage system. In: Physica C: Superconductivity and its applications. 2002 ; Vol. 378-381, No. PART 1. pp. 11-17.

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abstract = "We report on the NEDO project of superconducting magnetic bearing (SMB) technologies for flywheel energy storage system. We fabricated SMB modules which consist of a stator of roof-tile shape YBaCuO bulks and a NdFeB permanent magnet circuit. The levitation force density of the bearings was 9 N/cm2. It was confirmed that pre-loading and excess cooling methods are both effective for suppressing the gradual fall of rotor due to flux creep. We designed a basic concept of 10 kWh class flywheel energy storage system and investigated the feasibility of active magnetic bearings for the 10 kWh system. We also examined the fabrication condition of CFRP flywheels for the system.",

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