Title :
Design of superconducting magnetic bearings with high levitating force for flywheel energy storage systems
Author :
Xia, Z. ; Chen, Q.Y. ; Ma, K.B. ; McMichael, C.K. ; Lamb, M. ; Cooley, R.S. ; Fowler, P.C. ; Chu, W.K.
Author_Institution :
Texas Center for Supercond., Houston Univ., TX, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
Hybrid superconducting magnetic bearing (SMB), using YBCO high temperature superconductors (HTS) coupled with permanent magnets, has been implemented into a flywheel energy storage (FES) system prototype. The hybrid SMB design uses permanent magnets to levitate the rotor weighing 19 kg and superconductors to stabilize the inherently unstable magnet-magnet interactions. The SMB bearings are brought into action under convenient field-cooled conditions. Spin-down performance of the constructed FES prototype was tested under a moderate vacuum.<>
Keywords :
barium compounds; flywheels; high-temperature superconductors; machine bearings; magnetic levitation; permanent magnets; rotors; stability; superconducting magnets; yttrium compounds; 19 kg; YBaCuO; YBaCuO high temperature superconductor; field-cooled conditions; flywheel energy storage systems; high levitating force; magnet-magnet interactions stabilisation; permanent magnets; rotor levitation; spin-down performance; superconducting magnetic bearings; vacuum; Couplings; Energy storage; Flywheels; High temperature superconductors; Magnetic levitation; Permanent magnets; Prototypes; Superconducting magnetic energy storage; Superconducting magnets; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
