Superconducting magnetic bearing composed by a permanent magnet and bulk HTS sample

In the considered examples, the HTS sample is either a bulk superconductor or stacks of 2G wires. In the second case, the 2G stack was homogenized in order to speed up the solution. The movement between the HTS and the permanent magnet is avoided in the model by restricting the simulation domain to the HTS itself, which can be done by applying appropriate boundary conditions.

Available here are two Matlab scripts that can be used two build up the 10 COMSOL models presented in the reference paper. The first file (“SMB_BULK_test_1_to_5.m”) allows the simulation of tests 1 to 5, using the bulk superconductor. The second file (“SMB_2G_STACKS_test_6_to_10.m”) models the SMB built with 2G stacks and can be used to simulate tests 6 to 10.

The figure above shows an example of induced current density profiles for the SMB built with bulk.

This model was shared by Guilherme Goncalves Sotelo, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil

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References

1. Sass et al. 2015 Supercond. Sci. Technol. 28 125012