Patent ID: 7285881

Claim:
A superconducting device, comprising: a rotor which is mounted such that it can rotate about a rotation axis, the rotor comprising: a thermally conductive winding mount having a central cylindrical cavity which extends in a direction of the rotation axis; and at least one superconducting winding having conductors arranged in the thermally conductive winding mount; wherein the central cylindrical cavity substantially projects through an entire length of the winding mount, the central cylindrical cavity being closed on one end by the winding mount, a cooling unit having at least one cooling head, the cooling unit and the cooling head being located in a fixed position outside the rotor; a fixed heat transmission cylinder rigidly and thermally conductively connected to the cooling head of the cooling unit, the fixed heat transmission cylinder projecting into the central cylindrical cavity of the winding mount so as to maintain a hollow-cylindrical annular gap between the winding mount and the fixed heat transmission cylinder; and a contact gas retained within at least a portion of the annular gap for heat transmission between the winding mount and the heat transmission cylinder wherein the heat transmission cylinder is closed at an end projecting into the winding mount, the annular gap being sealed on a side facing the cooling head by a sealing device having parts which rotate with the rotor.