A Novel Axial High-Temperature Superconducting Magnetic Bearing With Simple Structure and Large Suspension Force

Abstract

In this paper, we propose a novel axial high temperature superconducting magnetic bearing (HTSMB) which is used in the field of shaftless magnetic levitation flywheel. The permanent magnet (PM) rotor of the HTSMB is assembled with Halbach PM rings and a polymagnet yoke disc, and HTS bulks are equally distributed in a circle on the stator disk. Firstly, the structure of the novel axial HTSMB is proposed, and the potential advantage is introduced. Secondly, the suspension characteristic of a HTS bulk is simulated based on COMSOL Multiphysics interface of Magnetic Field, No Current (mfnc), Magnetic Field Formula (mfh), and Moving Mesh (ale), and it is verified by experiments. On this basis, the specific structure and size of the HTSMB are optimally designed by using ANSYS Maxwell. Then, the HTSMB is processed and assembled, a general method for assembling the PM rotor is introduced in detail. Finally, the suspension characteristic of the HTSMB is experimentally studied. The experimental results show that the HTSMB has more advantages in axial suspension characteristics and material cost.