TY - JOUR
T1 - A new type of active-maglev system using YBCO bulk and multiple electromagnets
AU - Kamoshida, Ryota
AU - Ueda, Hiroshi
AU - Ishiyama, Atsushi
N1 - Funding Information:
Manuscript received August 6, 2002. This work was supported in part by Grant-in Aid for basic research, the Ministry of Education, Culture, Sports, Science and Technology, Japan. The authors are with the Department of Electrical, Electronics and Computer Engineering, Waseda University, Tokyo 169-8555, Japan (e-mail: atsushi@mn.waseda.ac.jp). Digital Object Identifier 10.1109/TASC.2003.813023
PY - 2003/6
Y1 - 2003/6
N2 - We have been developing a new type of active-maglev system that is a transporter in the vertical direction, consisting of high-temperature bulk superconductors and multiple electromagnets piled up on the vertical axis. In a previous paper, using an active-maglev system composed of a disk-shaped YBCO bulk and five electromagnets, we have demonstrated continuous levitation and verified that its levitation height, as well as stability, can be remarkably improved by adjusting the operating current of the electromagnets individually. Electromagnetic behavior within the bulk has been also investigated numerically by a newly developed computer program based on the finite-element method adopting the Bean model. Agreement of levitation force and height between experiments and numerical analyses was good. The levitation force properties strongly depend on the field-cooling condition and the distribution and magnitude of the external magnetic field generated by the electromagnets. We clarify electromagnetic phenomena within the bulk superconductor by the computer program developed to improve the levitation properties for applications of continuous levitation to real maglev systems.
AB - We have been developing a new type of active-maglev system that is a transporter in the vertical direction, consisting of high-temperature bulk superconductors and multiple electromagnets piled up on the vertical axis. In a previous paper, using an active-maglev system composed of a disk-shaped YBCO bulk and five electromagnets, we have demonstrated continuous levitation and verified that its levitation height, as well as stability, can be remarkably improved by adjusting the operating current of the electromagnets individually. Electromagnetic behavior within the bulk has been also investigated numerically by a newly developed computer program based on the finite-element method adopting the Bean model. Agreement of levitation force and height between experiments and numerical analyses was good. The levitation force properties strongly depend on the field-cooling condition and the distribution and magnitude of the external magnetic field generated by the electromagnets. We clarify electromagnetic phenomena within the bulk superconductor by the computer program developed to improve the levitation properties for applications of continuous levitation to real maglev systems.
KW - Active magnetic levitation
KW - Bulk superconductor
KW - FEM
UR - http://www.scopus.com/inward/record.url?scp=0042473257&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0042473257&partnerID=8YFLogxK
U2 - 10.1109/TASC.2003.813023
DO - 10.1109/TASC.2003.813023
M3 - Article
AN - SCOPUS:0042473257
SN - 1051-8223
VL - 13
SP - 2157
EP - 2160
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2
ER -