TY - JOUR
T1 - Fabrication and evaluation of superconducting magnetic bearing for 10 kW h-class flywheel energy storage system
AU - Ichihara, T.
AU - Matsunaga, K.
AU - Kita, M.
AU - Hirabayashi, I.
AU - Isono, M.
AU - Hirose, M.
AU - Yoshii, K.
AU - Kurihara, K.
AU - Saito, O.
AU - Saito, S.
AU - Murakami, M.
AU - Takabayashi, H.
AU - Natsumeda, M.
AU - Koshizuka, N.
N1 - Funding Information:
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Superconducting Bearing Technologies for Flywheel Energy Storage System. We would like to thank the R&D members, which are Shikoku Research Institute Inc., Ishikawajima-Harima Heavy Industries Co., Ltd., Koyo Seiko Co., Ltd., NEOMAX Co., Ltd. and Imra Material R&D Co., Ltd. for their contribution. We would also like to thank H. Ishikawa, T. Maeda (Shikoku Research Institute), T. Horigami and A. Kawaji (ISTEC) for their continuous encouragement and useful discussions.
PY - 2005/10/1
Y1 - 2005/10/1
N2 - Radial-type superconducting magnetic bearings (SMB) have been developed for a 10 kW h-class flywheel energy storage system. The bearings consist of an inner-cylindrical stator composed of YBCO bulk superconductors and an outer-rotor composed of permanent magnets. The rotor is suspended without contact using the pinning forces of the bulk superconductors. After construction of the whole system, various tests on both static and dynamic characteristics of the SMB were carried out to confirm that the SMB has sufficient performance for 10 kW h-class flywheel systems. Besides, the bearing rotation loss was measured. In this paper, we describe the implementation of the stator part and report the SMB test results, namely that the rotor was successfully suspended up to 7500 rpm. Thus we succeeded in the energy storage of 2.24 kW h. The rotation loss of the SMB was estimated as 40 W at 7500 rpm, which was mainly caused by the inhomogeneous magnetic field of the bulk superconductors.
AB - Radial-type superconducting magnetic bearings (SMB) have been developed for a 10 kW h-class flywheel energy storage system. The bearings consist of an inner-cylindrical stator composed of YBCO bulk superconductors and an outer-rotor composed of permanent magnets. The rotor is suspended without contact using the pinning forces of the bulk superconductors. After construction of the whole system, various tests on both static and dynamic characteristics of the SMB were carried out to confirm that the SMB has sufficient performance for 10 kW h-class flywheel systems. Besides, the bearing rotation loss was measured. In this paper, we describe the implementation of the stator part and report the SMB test results, namely that the rotor was successfully suspended up to 7500 rpm. Thus we succeeded in the energy storage of 2.24 kW h. The rotation loss of the SMB was estimated as 40 W at 7500 rpm, which was mainly caused by the inhomogeneous magnetic field of the bulk superconductors.
KW - Flywheel energy storage system
KW - Radial-type superconducting magnetic bearings
KW - Rotation energy loss
KW - YBCO bulk superconductors
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U2 - 10.1016/j.physc.2005.02.076
DO - 10.1016/j.physc.2005.02.076
M3 - Conference article
AN - SCOPUS:25644451988
SN - 0921-4534
VL - 426-431
SP - 752
EP - 758
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - I
T2 - Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity
Y2 - 23 November 2004 through 25 November 2004
ER -