Abstract

Magnetic fields between a permanent magnetic flywheel ring and a superconducting bearing are simulated using COMSOL Multiphysics and compared to analytical results. The flux distribution around a Neodymium Iron Boron ring of 20 mm in inner radius, 80 mm in outer radius, and 23 mm in thickness can be visualized and compared in radial and axial directions. The flux density simulated along the angular direction at the outer radius is 0.34-0.14 T at 5-20 mm away from the ring. Furthermore, the flux exclusion by the superconducting bearing required for lifting flywheel rings of different geometries are demonstrated.