Our group has developed a new energy storage flywheel system using a superconducting magnetic bearing (SMB) and a permanent magnet bearing (PMB). The superconducting magnetic bearing (SMB) suppresses the vibrations of the flywheel rotor. The permanent magnet bearing (PMB) passively controls the rotor position. The energy storage flywheel system is characterized by using the two different type magnetic bearings of PMB and SMB. Dynamics and charge-discharge characteristics are improved and discussed in this paper.
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Mitsuda et al. (2009) studied this question.
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