Effect of HTS shielding pellet on the performance of superconducting synchronous motor based on flux concentration

In this paper, we propose a solution which enhances the performance of the inductor in high-power superconducting synchronous machines based on the flux concentration while keeping the same topology and using a high temperature superconducting shielding pellet located between the two coils of the inductor. This pellet permits to recover the magnetic field which vanishes in the medium region due to the opposite direction of the coils. A method for 3D magnetostatic field analysis using the control volume method with unstructured grid is proposed. With this topology, we have obtained a maximum efficiency of about 8% in the flux density.