Application of superconducting magnetic bearings to a 10 kWh-class flywheel energy storage system

Takumi Ichihara; Koji Matsunaga; Makoto Kita; Izumi Hirabayashi; Masayuki Isono; Makoto Hirose; Keiji Yoshii; Kazuaki Kurihara; Osamu Saito; Shinobu Saito; Masato Murakami; Hirohumi Takabayashi; Mitsutoshi Natsumeda; Naoki Koshizuka

doi:10.1109/TASC.2005.849622

Application of superconducting magnetic bearings to a 10 kWh-class flywheel energy storage system

Takumi Ichihara, Koji Matsunaga, Makoto Kita, Izumi Hirabayashi, Masayuki Isono, Makoto Hirose, Keiji Yoshii, Kazuaki Kurihara, Osamu Saito, Shinobu Saito, Masato Murakami, Hirohumi Takabayashi, Mitsutoshi Natsumeda, Naoki Koshizuka

Research output: Contribution to journal › Article

58 Citations (Scopus)

Abstract

Radial type superconducting magnetic bearings have been developed for a 10 kWh-class flywheel energy storage system. The bearings consist of an inner-cylindrical stator of YBCO bulk superconductors and an outer-rotor of permanent magnets. The rotor is suspended without contact via the pinning forces of the bulk superconductors that are arranged such that the c-axis of each superconductor is aligned parallel to the radial direction of the cylinder. In this paper, we describe the implementation of the stator part and report the SMB test results, namely that the rotor was successfully rotated at up to 7,500 rpm. Thus we succeeded in energy storage of 2.24 kWh.

Original language	English
Pages (from-to)	2245-2248
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	15
Issue number	2 PART II
DOIs	https://doi.org/10.1109/TASC.2005.849622
Publication status	Published - 2005 Jun 1

Keywords

Flywheel energy storage system
Pinning force
Radial type superconducting magnetic bearings
YBCO bulk superconductors

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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Ichihara, T., Matsunaga, K., Kita, M., Hirabayashi, I., Isono, M., Hirose, M., Yoshii, K., Kurihara, K., Saito, O., Saito, S., Murakami, M., Takabayashi, H., Natsumeda, M., & Koshizuka, N. (2005). Application of superconducting magnetic bearings to a 10 kWh-class flywheel energy storage system. IEEE Transactions on Applied Superconductivity, 15(2 PART II), 2245-2248. https://doi.org/10.1109/TASC.2005.849622

Application of superconducting magnetic bearings to a 10 kWh-class flywheel energy storage system. / Ichihara, Takumi; Matsunaga, Koji; Kita, Makoto; Hirabayashi, Izumi; Isono, Masayuki; Hirose, Makoto; Yoshii, Keiji; Kurihara, Kazuaki; Saito, Osamu; Saito, Shinobu; Murakami, Masato; Takabayashi, Hirohumi; Natsumeda, Mitsutoshi; Koshizuka, Naoki.

In: IEEE Transactions on Applied Superconductivity, Vol. 15, No. 2 PART II, 01.06.2005, p. 2245-2248.

Research output: Contribution to journal › Article

Ichihara, T, Matsunaga, K, Kita, M, Hirabayashi, I, Isono, M, Hirose, M, Yoshii, K, Kurihara, K, Saito, O, Saito, S, Murakami, M, Takabayashi, H, Natsumeda, M & Koshizuka, N 2005, 'Application of superconducting magnetic bearings to a 10 kWh-class flywheel energy storage system', IEEE Transactions on Applied Superconductivity, vol. 15, no. 2 PART II, pp. 2245-2248. https://doi.org/10.1109/TASC.2005.849622

Ichihara, Takumi ; Matsunaga, Koji ; Kita, Makoto ; Hirabayashi, Izumi ; Isono, Masayuki ; Hirose, Makoto ; Yoshii, Keiji ; Kurihara, Kazuaki ; Saito, Osamu ; Saito, Shinobu ; Murakami, Masato ; Takabayashi, Hirohumi ; Natsumeda, Mitsutoshi ; Koshizuka, Naoki. / Application of superconducting magnetic bearings to a 10 kWh-class flywheel energy storage system. In: IEEE Transactions on Applied Superconductivity. 2005 ; Vol. 15, No. 2 PART II. pp. 2245-2248.

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AU - Hirose, Makoto

AU - Yoshii, Keiji

AU - Kurihara, Kazuaki

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AU - Murakami, Masato

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AB - Radial type superconducting magnetic bearings have been developed for a 10 kWh-class flywheel energy storage system. The bearings consist of an inner-cylindrical stator of YBCO bulk superconductors and an outer-rotor of permanent magnets. The rotor is suspended without contact via the pinning forces of the bulk superconductors that are arranged such that the c-axis of each superconductor is aligned parallel to the radial direction of the cylinder. In this paper, we describe the implementation of the stator part and report the SMB test results, namely that the rotor was successfully rotated at up to 7,500 rpm. Thus we succeeded in energy storage of 2.24 kWh.

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