TY - JOUR
T1 - Characterization of YBCO bulk superconductors for 100 kW h flywheel
AU - Matsunaga, K.
AU - Yamachi, N.
AU - Tomita, M.
AU - Murakami, 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.
PY - 2003/10
Y1 - 2003/10
N2 - We characterized YBCO bulk superconductors that will be installed in the radial type superconducting magnetic bearing module for a 100 kWh class flywheel system. The inner-stator is a cylinder with the outer diameter of 208 mm, the inner diameter of 180 mm, and the height of 100 mm. At present the stator is planned to consist of 24 and 16 YBCO plates. We measured the trapped magnetic-field distribution of the YBCO plates that will be installed in the stator by using Hall probes at 77 K after having been cooled in the presence of 1.5 T. The peak field values ranged from 0.82 to 0.87 T. The field distribution suggested that the YBCO plates were almost single domain. We also measured the repulsive force between the YBCO bulk at 77 K and a permanent magnet with the magnetic surface induction of 0.37 T. The repulsive force was about 50 N at 1.5 mm gap.
AB - We characterized YBCO bulk superconductors that will be installed in the radial type superconducting magnetic bearing module for a 100 kWh class flywheel system. The inner-stator is a cylinder with the outer diameter of 208 mm, the inner diameter of 180 mm, and the height of 100 mm. At present the stator is planned to consist of 24 and 16 YBCO plates. We measured the trapped magnetic-field distribution of the YBCO plates that will be installed in the stator by using Hall probes at 77 K after having been cooled in the presence of 1.5 T. The peak field values ranged from 0.82 to 0.87 T. The field distribution suggested that the YBCO plates were almost single domain. We also measured the repulsive force between the YBCO bulk at 77 K and a permanent magnet with the magnetic surface induction of 0.37 T. The repulsive force was about 50 N at 1.5 mm gap.
KW - Repulsive force
KW - Superconducting magnetic bearing
KW - Trapped magnetic-field
KW - YBCO bulk superconductor
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U2 - 10.1016/S0921-4534(03)01014-1
DO - 10.1016/S0921-4534(03)01014-1
M3 - Conference article
AN - SCOPUS:0042691309
SN - 0921-4534
VL - 392-396
SP - 723
EP - 728
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - PART 1
T2 - Proceedings of the 15th International Symposium on Superconduc
Y2 - 11 November 2002 through 13 November 2002
ER -