Abstract: A contactless superconducting synchronous electrical machine comprises a rotor affixed to a rotatable shaft and provided with a superconducting field winding, the superconducting field winding being positioned within a cryostat; an annular stator located in concentrical relation with the rotor; and an exciter for the superconducting field winding provided with an inductor and a superconducting armature winding, the superconducting armature winding being positioned within the cryostat, affixed to the shaft and electrically connected to the superconducting field winding. The superconducting armature winding is implemented in the form of a cylindrical sheating affixed to a cylindrical surface of an annular former which is rigidly fixed to the shaft in concentrical relation therewith.

Abstract: Disclosed is a rotor of a cryogenic electrical machine, comprising a superconducting field winding consisting of flat coils each of which is enclosed in a housing having therein tangential and axial passages, metal partitions disposed between the coils, an electrically insulating material, radial passages communicating the central cavity of the rotor with the tangential passages of the housing, and a bandage embracing the coils separated by said partitions, each housing being made up of a base embraced by the coil, wedges and inserts, radial passages being formed in the bases and wedges of the housings, and the electrically insulating material being made as strips forming passages communicating the radial passages of the bases and wedges.