AbsiracCHybrid superconducting magnetic bearing(SMB), using YBCO high temperature superconductors(€ITS) coupled with permanent magnets, has been implemented into a flywheel energy storage(FES) system prototype. The hybrid S M B 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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