Honor Paper: Analysis of the Levitation Characteristics of Superconducting Magnetic Bearings

A new calculation method for the levitation characteristics of superconducting magnetic bearings (SMBs) is presented. The method is based both on electromagnetic FEM of the magnetic field and the 2 dimensional Bean Model for analysis of magnetization of type n superconductors. To obtain magnetizing hysteresis, a superconductor is meshed into cells for calculation. The patterns of the hysteresis are grouped into 31 cases according to variation of the parameters which are the length of the a and b sides of the cell, critical current density Jc, amplitude of the varying magnetic field ? H and the field cooling magnetic field strength Ho. Computer subroutines were made for all 31 cases in order to calculate levitation force hysteresis of any kind of SMBs in a short time. Close agreement was achieved between calculation and experiment on levitation characteristics.