Experimental results of field windings and concepts of rotor component development of superconducting generator

Superconducting field windings of superconducting generators are wound in slots which are cut on the outer surface of a support tube, and they are supported by wedges against centrifugal and electromagnetic forces. To improve reliability of field windings, AC losses due to flux change and ohmic losses due to the winding connections must be small and field windings must be tightly compressed by wedges. This paper presents experimental results of AC losses, ohmic losses, compression-displacement measurements of field windings, and design concepts of our rotor component development project.