Dynamic Characteristics in the Horizontal Direction for New Type SMB Using SC Bulk and SC 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 type SMBs composed of SC bulk, SC coil and PM are proposed. In order to compare SMB Type-I with Type-II, impulse responses in the horizontal direction are performed. Then, natural damped vibration curves for impulse responses are observed. The damping coefficient for the SMB Type-II is very larger than the Type-I. The damping coefficient depends on the position of SC coil.