Proposal of New Superconducting Magnetic Bearing Using High $T_{c}$ Superconducting Bulk and Coil

Superconducting magnetic bearings (SMBs) are usually composed of superconducting (SC) bulk and permanent magnet (PM). These SMBs are based on pinning forces between SC bulk and PM. In this paper, new SMBs composed of an SC bulk, an SC coil, and a PM are proposed. In order to compare Type-I and Type-II SMBs, impulse responses are performed. Then, damped free vibration curves for impulse responses are observed. The damping coefficient for the SMB Type-II is very larger than the Type-I. From the experimental results, both stiffness and damping coefficient for the SMB Type-II are better than the Type-I.