Abstract
The magnetic flux concentration method is a method for making magnetic flux and magnetic field gradient large by using the following phenomena. When the magnetic material plate is put between repulsed permanent magnets, the nearby magnetic flux is concentrated, therefore large magnetic flux and magnetic field gradient is generated. The restoring force of the Hi-Tc superconductor is different according to the constrained magnetic field, and the larger constrained magnetic field is, the larger restoring force is. As a result, the restoring force of the Hi-Tc superconducting magnetic bearing can be enlarged by applying the magnetic flux concentration method to the rotor. In this research, it develop synchronous motor with Hi-Tc superconducting magnetic bearing that applies magnetic flux concentration method, and driving experiment was done. Because the pitching generated in the rotor was large as a result of the experiment, the magnetic damper was developed. The excitation experiment and driving experiment was done, and the effect of the magnetic damper was confirmed.
