The levitation force and stability in a superconductor-magnet system with maglev geometry are studied as function of the critical-current density of the superconductor, from a realistic model based on minimizing the magnetic energy. Results show that although the force is an increasing function of the critical-current density Jc, an overhigh Jc may result in instability. Therefore, the optimum critical-current density in the superconductor for a given levitation system should be an intermediate value which depends on the system dimensions and the magnetic field of the magnet. © 2009 American Institute of Physics.
|Journal||Journal of Applied Physics|
|Publication status||Published - 9 Feb 2009|