Abstract: A rotor of a cryogenic dynamoelectric machine comprises a supporting structure with radial slots therein separated by teeth. Coils of a superconducting field winding are placed in the slots and pressed by wedges fitted into axial grooves made in side walls of the slots. An annular shroud embraces the supporting structure. The outer surface of each wedge, facing the shroud, projects beyond the surfaces of the teeth arranged adjacent to the wedge, which also face the shroud. The shroud is provided with a radial interference fit with the outer surfaces of the wedges, with a first radial clearance formed between the shroud and the teeth. Provided between the surface of each wedge, facing the rotor axis and the opposite surfaces of the axial grooves, is a second radial clearance. The magnitude of each of the two clearances is no less than that of the interference fit of the shroud with the outer surfaces of the wedges.

Abstract: Disclosed is a dynamoelectric machine rotor with a superconducting winding, including an inner shaft formed by a superconducting winding supporting structure, an outer shaft formed by a cylindric shell and end extensions fixed to the ends thereof, an electromagnetic shield including an inner cylinder made of a material with high electrical conductivity and an outer cylinder made of a material with high mechanical strength, the electromagnetic shield being fitted on the outer shaft with a radial interference, and a layer of a solid lubricant interposed between the adjoining surfaces of the electromagnetic shield and outer shaft.

Abstract: A locking structure for the rotor end winding of a distributed polar electric machine comprises a retaining ring embracing the rotor end winding and fixed on the rotor body by a shrink fit, and a locking ring preventing the retaining ring from axial shift with respect to the rotor body. The locking ring embraces both the retaining ring and the rotor body within their connection area and is secured firmly against radial shift with respect to both of them by the shrink fit. Said locking ring has bayonet joint portions on its inner surface at one of the end faces thereof, and has a bead at its other end face, serving as a thrust for a ring key. Mating portions of the bayonet joint are provided on the outer surface of the retaining ring, while the ring key is located on the rotor body.

Abstract: A method of assembling a stator core of an electric machine inside the housing thereof comprises securing resilient coupling ribs with their resilient portions to the housing, the resilient portions of the ribs being previously urged against the supporting portion of the ribs up to an elastic deformation state by means of detachable clamping members, assembling core segments on the core supporting portions of the resilient coupling ribs, compressing the core segments, securing the core under compression to the ribs, and removing of the detachable clamping members when the core is secured to the resilient coupling ribs.

Abstract: An electric machine rotor end winding mounting shroud comprising a cylindrical shell having a thinned portion adjacent directly to the rotor body and provided with an inner annular recess at the edge region of the rotor body, whereby this cylindrical shell portion is made flexible, the cylindrical shell being cantilever-like arranged at the end portion of the rotor body.