Electromagnetic Field Analysis and Performance Improvement of Superconductive-Assisted Polishing Machine Model by Using Superconducting Tape Ribs

In this study, we have focused on superconductive-assisted polishing machine that is mainly composed of superconducting bulks and permanent magnet. This machine utilizes magnetic levitation, which enables processing in mid-air and inside a hollow object. In our previous work, we used the superconducting tapes instead of superconducting bulks for improvement, and confirmed that the performance was well as using superconducting bulks. Therefore, we considered that it is necessary to evaluate the performance of the superconductive-assisted polishing machine using superconducting tapes. We compared the previous model and the model with ribs which had a better result in the experiment. It is expected that the ribs will trap the magnetic flux so that we can get greater repulsive force. However, ribs did not work well enough in the calculations result using finite element method, because the magnetic flux did not penetrate vertically into the ribs.