Patent ID: 7816826

Claim:
A machine system, comprising: a stator; a rotor, rotatatable about a rotation axis extending along an axial direction, substantially surrounded by said stator and having a central cylindrical rotor cavity extending in the axial direction and at least one rotor winding with superconductive conductors thermally conductively coupled to the central cylindrical rotor cavity; a thermally conductive body, projecting statically into the central cylindrical rotor cavity while maintaining an annular gap therebetween, including a central refrigerant space at least partially provided with a lining made of a porous material with a thermal conductivity of at least 100 W/(m*K) at an operating temperature of the superconductive conductors, which forms capillary-like structures or cavities accessible for a refrigerant; a thermal contact gas disposed in the annular gap; a stationary refrigeration unit disposed outside said rotor and enclosing a condenser space; and tubular line sections extending between the central refrigerant space of said thermally conductive body and the condenser space of said stationary refrigeration unit, said tubular line sections, the central refrigerant space and the condenser space forming a closed line system in which the refrigerant is circulated by utilizing a thermosiphon effect.