TY - GEN
T1 - The force relaxation in levitating high Tc superconductor
AU - Ito, E.
AU - Komano, Y.
AU - Sawa, K.
AU - Murakami, M.
AU - Sakai, N.
AU - Hirabayashi, I.
PY - 2006/3/31
Y1 - 2006/3/31
N2 - In development of a flywheel energy storage system, electric power loss reduction is expected by using superconducting bearings. However, for realization of superconducting bearing strong levitation force, rotation loss reduction and axial descent reduction are required. It is known with axial descent reduction technology that a preload method is effective, whereas by this method, the levitation force becomes quite small compared with the normal levitation. We confirmed the performance of the preload method by experiment using a YBCO superconducting electromagnet. The preload method is improved and a method, which does not change the rate of the force relaxation and makes the levitation force larger than the existing preload method is proposed.
AB - In development of a flywheel energy storage system, electric power loss reduction is expected by using superconducting bearings. However, for realization of superconducting bearing strong levitation force, rotation loss reduction and axial descent reduction are required. It is known with axial descent reduction technology that a preload method is effective, whereas by this method, the levitation force becomes quite small compared with the normal levitation. We confirmed the performance of the preload method by experiment using a YBCO superconducting electromagnet. The preload method is improved and a method, which does not change the rate of the force relaxation and makes the levitation force larger than the existing preload method is proposed.
KW - Bulk superconductor
KW - Levitation
KW - Shielding current distribution
KW - Y-Ba-Cu-O
UR - http://www.scopus.com/inward/record.url?scp=33845447334&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33845447334&partnerID=8YFLogxK
U2 - 10.1063/1.2192429
DO - 10.1063/1.2192429
M3 - Conference contribution
AN - SCOPUS:33845447334
SN - 0735403163
SN - 9780735403161
T3 - AIP Conference Proceedings
SP - 820
EP - 827
BT - ADVANCES IN CRYOGENIC ENGINEERING
T2 - ADVANCES IN CRYOGENIC ENGINEERING: Transactions of the International Cryogenic Materials Conference, ICMC
Y2 - 29 August 2005 through 2 September 2005
ER -