Superconductor levitation - QuickField simulation example
This example is prepared by Gyore Attila, Gyurki Peter, Janko Arpad.
How to find levitation force between magnet and superconductor?
Answer Typical applications Geometry
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Task
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Department of Electrical Machines and Drives, Technical University of Budapest
Engineering question
Set up an axisymmetric QuickField DC Magnetics problem for a magnet and superconductor and evaluate levitation force from computed field results.
superconducting levitation systems, magnetic suspension devices, flux pinning assemblies
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Simulation problem
Problem Type
Axisymmetric problem of DC magnetics.
Permanent magnet permeability μ=1, coercive force Hc = 575 kA/m.
Magnetization curve to simulate superconductor
Calculate the force acting on a superconductor.
To avoid the influence of the boundaries while modelling the unbounded problem, we'll enclose the magnet in a rectangular region of air and specify zero Dirichlet boundary condition on its sides.
Magnetization of straight parts of the magnet is specified in terms of coercive force vector. Effective surface currents simulate magnetization in the middle curved part of the magnet.
In these five pieces model series is showed the levitation effect of superconductors with different air gap between magnet and the superconductor. QuickField provides the possibility to study the performance of superconductors.
This is the only software, which is capable to take the characteristic of superconductors. There are different applications of superconductors for example in magnetic bearing or fast-train levitation.
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