Abstract
The RTRI conducted a study to develop a superconducting magnetic bearing applicable to the flywheel energy-storage system for railways. The study is intended for improving the driving efficiency by decrease in the frictional loss and solving the problems concerning the maintenance by applying the superconducting technology to the bearing part. In the first step of the study, the thrust rolling bearing was selected for application, and adopted liquid nitrogen cooled HTS-bulk as a rotor, and adopted superconducting coil as a stator for the superconducting magnetic bearing. Load capacity of superconducting magnetic bearing was verified up to 10 kN by static load. After that, rotation test of that approximately 5 kN thrust load added was performed with maximum rotation of 3000rpm.
