Influence of copper damper on bifurcation vibration in superconductive magnetic levitation system

With proper external vibrations, the dynamic behavior of a high-temperature superconducting levitation system will show interesting bifurcation and complex chaos. In order to eliminate the effects of nonlinear vibrations, a larger magnetic force generated by a high-temperature superconductor (HTSC) with strong flux pinning is necessary. However, it provides minimal inherent damping. In this article, we numerically studied the effect of different copper damper arrangements on the superconductive magnetic levitation system in nonlinear vibration by the finite element method. Furthermore, we compared the results with and without a copper damper by analyzing the displacements, temperature differences, and electromagnetic forces (HTSC and copper). The results indicate that adjusting the copper damping can increase the interference rejection capacity of the superconductive magnetic levitation system.