TY - JOUR
T1 - Present status of R & D on superconducting magnetic bearing technologies for flywheel energy storage system
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 - Oka, T.
AU - Ikezawa, H.
AU - Tomita, M.
N1 - Funding Information:
We would like to thank K. Matsui (IHI), R. Yabuno (IMRA), H. Kameno (Koyo), M. Tomita, N. Yamachi, T. Horigami, K. Nakazato, M. Anjyu and S. Tanaka (ISTEC) for their contribution to the project. This work is 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.
PY - 2002/10/1
Y1 - 2002/10/1
N2 - 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.
AB - 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.
KW - Active magnetic bearing
KW - Flywheel energy storage system
KW - Levitation force
KW - Rotation loss
KW - Superconducting magnetic bearing
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U2 - 10.1016/S0921-4534(02)01374-6
DO - 10.1016/S0921-4534(02)01374-6
M3 - Article
AN - SCOPUS:17744409231
VL - 378-381
SP - 11
EP - 17
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - PART 1
ER -