Rotor and machine with a cylindrical carrying body

A rotor for an electric machine having a central rotor axis, comprising:

• at least one superconducting coil assembly;
• a cooling system for cooling the coil assembly to a cryogenic operating temperature;
• and
• a carrying body which from a radially inward side of the coil assembly mechanically supports the at least one coil assembly;
• wherein the carrying body has a substantially cylindrical external contour;
• wherein the carrying body is composed largely of a non-magnetic material which has a density of at most 4.6 g/cm3 and a thermal conductivity of at least 10 W/(m-K);
• wherein the carrying body is designed for thermally coupling the superconducting coil assembly to the cooling system;
• and
• wherein the carrying body has an inner cylinder and an outer cylinder, wherein the outer cylinder radially surrounds the inner cylinder and on the external side of the former mechanically supports the at least one coil assembly.