Mounting structure for superconducting windings

A rotor assembly of an electric rotating machine, the rotor assembly comprising:

• a superconducting coil assembly for mounting to a portion of the rotor assembly, in operation, maintained at cryogenic temperatures and the rotor assembly, in operation, being maintained above cryogenic temperatures, the superconducting coil assembly including:
• at least one superconducting winding wound about a longitudinal axis of the coil assembly, and having an inner radial surface defining a bore extending through the coil assembly, said at least one superconducting winding configured to be mounted to the portion of the rotor assembly, at least one superconducting winding being spaced from and in radial relation to the axis of the rotor assembly
• and at least one support member extending across the bore and mechanically coupled to the portion of the rotor assembly and to opposing portions of the inner radial surface of the at least one superconducting winding.