Abstract
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.
Highlights
High-temperature superconducting magnetic levitation systems can maintain stable levitation without energy input
Sanchez studied the vertical force of high-temperature superconducting–permanent magnet (PM) levitation systems associated with a small external disturbance with lower damping, and the results indicate that the levitation system could not obtain dynamic stability
The results show that copper dampers can be used as a way to control the bifurcation vibration of high-temperature superconducting–PM levitation systems
Summary
High-temperature superconducting magnetic levitation systems can maintain stable levitation without energy input. A determinate high-temperature superconducting levitation system could display Hopf bifurcation characteristics and chaotic vibration in experiments.. Except for the magnetic force, the system’s stability is due to the damping with the vibration.. To maintain the high-temperature superconducting–PM levitation system’s stability, a more substantial magnetic levitation force and more significant damping are essential.. Sanchez studied the vertical force of high-temperature superconducting–PM levitation systems associated with a small external disturbance with lower damping, and the results indicate that the levitation system could not obtain dynamic stability.. We present simulation studies on the oscillation start process of high-temperature superconducting–PM levitation systems. The results show that copper dampers can be used as a way to control the bifurcation vibration of high-temperature superconducting–PM levitation systems
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