Superconducting device with a cooling-unit cold head thermally coupled to a rotating superconductive winding

A superconducting device, comprising:

• a rotor which is rotatable about a rotation axis that defines an axial direction;
• a thermally conductive winding mount;
• a superconducting winding having conductors arranged in the winding mount;
• a central cavity being surrounded by the winding mount, the central cavity substantially projecting through the entire length of the winding mount in the axial direction, wherein the conductors of the superconducting winding are thermally connected to the central cavity via the winding mount;
• a connecting cavity laterally connected to the central cavity to rotate with the central cavity and passing from an area of the winding mount to an area outside of the rotor;
• a cold head located in a fixed manner outside the rotor and thermally connected to a condenser unit for condensation of a refrigerant;
• and
• a stationary refrigerant transfer pipe coupled to the condenser unit, wherein the transfer pipe projects axially into the connecting cavity, the refrigerant transfer pipe, the connecting cavity and the central cavity being filled with the refrigerant such that condensed refrigerant passes from the condenser unit via the refrigerant transfer pipe into the connecting cavity and from the connecting cavity into the central cavity, and vaporized refrigerant passes from the central cavity via the same connecting cavity and the same refrigerant transfer pipe back to the condenser unit.