矩形磁石を追加した超伝導体上に浮上する永久磁石の安定性

抄録

High magnetic rigidity is required to optimize superconducting levitation. We proposed a hybrid stator comprising a superconductor and permanent magnets for improving levitation stability. In this study, we measured the levitation characteristics of a magnet levitating above several hybrid stators with rectangular magnet pairs of different intervals. For the measurement, a superconducting stator without magnets was compared against hybrid superconducting stators. The vertical and horizontal magnetic forces between the hybrid stator and the levitating magnet were measured by quasi-static displacement. The interval of the rectangular magnet pair has an optimum value for maximize magnetic stiffness. The horizontal restoring force of the hybrid stator acted over a wider displacement range. When used in an optimal design, the proposed hybrid stator is expected to exhibit better levitation characteristics than a simple stator.