Electric rotary machine having superconducting rotor

摘要

An electric rotary machine having a superconducting rotor, such as a dynamoelectric machine. A cylindrical shielding member is provided for protecting the superconducting winding from the influence of the magnetic flux of the stator, and for shielding the heat radiated from the normal-temperature side of the machine, thereby maintaining the superconducting winding at an extremely low temperature. An inner reinforcing body and an outer reinforcing body are fitted to the inner and the outer peripheral surfaces of the cylindrical shielding member so as to reinforce the latter. These reinforcing bodies are effective to reduce the stress in the rotor caused by the centrifugal force and electromagnetic force during a running of the electric rotary machine, thereby protecting the shielding member against breakage and/or deformation.