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A case study for a superconducting magnetic bearing optimization
Superconducting magnetic bearings are improving devices and they have high potential use in flyweheel energy storage systems. Rotor stability in a superconducting magnetic bearing is one of the most challenging issue and it is closely related to the rotor’s levitation configuration. We have investigated the effect of various levitation configurations on the levitation force and stability on the rotor in the superconducting bearings. Beside the other mechanism and geometrical properties, it was determined that the optimum levitation of the rotor strongly depends on the superconductor and permanent magnet configurations in the bearing. In this context, a case study is introduced to discuss the optimization of the superconducting bearing. The case study includes the arraying permanent magnets and superconductors in certain configurations called model 1, 2, 3, 4 and 5. According to these models, the force calculations are performed by using frozen image model based on the Amperian current approximation. It was determined that the levitation is highly dependent on the permanent magnet and superconductor configuration.