Principle, Modeling and Experiment of a New Axial-Type Superconducting Magnetic Bearing With Superconducting Coil

In this paper, we proposed a new axial-type superconducting magnetic bearing (SMB) based on the interaction behavior between a permanent magnet and two closed superconducting coils. Firstly, the principle of the new SMB was presented. Then, the axial restoration characteristic is simulated based on a finite element simulation model. With the simulation results, the optimized parameters for designing the new SMB are obtained. Finally, we built a prototype of the axial SMB and a testing platform for measuring its axial restoring force. The experimental results indicated that the new axial-type SMB has practical axial double-direction stiffness and stability, and may provide an alternative technology for horizontal axle type flywheel energy storage system.