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Design of superconducting magnetic bearings with high levitating force for flywheel energy storage systems

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8 Author(s)
Xia, Z. ; Texas Center for Supercond., Houston Univ., TX, USA ; Chen, Q.Y. ; Ma, K.B. ; McMichael, C.K.
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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.<>

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Applied Superconductivity, IEEE Transactions on  (Volume:5 ,  Issue: 2 )