Abstract: A support assembly for the end windings of a turbine generator includes a plurality of braces which are spaced apart around the circumference of the winding basket and which are mechanically connected to support rings disposed around the stator coils. The support assembly is decoupled from the stator core such that the end windings and end winding support structure float freely of the stator core during normal generator operating conditions. During abnormal short circuit operating conditions, the support assembly contacts brackets on the stator core such that the end windings are slidably engaged upon and supported by the stator core. Radial clamps tightly secure the top and bottom coils to the end winding support assembly to apply radial compressive load to the coils to prevent radial displacement of the coils and to maintain the end winding-end winding support structure as a monolithic structure capable of withstanding abnormal operating conditions.

Abstract: A spring support system for supporting a stator core (2) in a frame of an electrical machine, the core (2) having a longitudinal axis and an outer periphery provided with a plurality of circumferentially spaced, axially extending dovetail grooves (6), and the frame including a plurality of circular flanges (32) which surround the core (2) when the core (2) is installed in the frame, the system including:a plurality of key bars (8) each having a portion formed to mate with a respective dovetail groove (6) and each seated in a respective groove (6) of the core (2);a plurality of spring bars (34) each extending parallel to a respective key bar (8) and each secured to the flanges (32);a plurality of key blocks (20) for securing the key bars (8) to the spring bars (34); andfastening elements (26,40) mechanically fastening each key block (20) to a respective key bar (8) and to a respective spring bar (34) at a location between two axially adjacent flanges (32).

Abstract: A method and apparatus for compressing a stator core assembly of an electric generator having a plurality of stacked punchings positioned between opposing compression plates. A through-bolt is passed through an aperture drilled through the stacked punchings, and a tensioning nut threaded onto one end of the through-bolt. A thrust nut is threaded onto a second end of the through-bolt, thereby compressing the punchings between the tensioning nut and a thrust nut. The tensioning nut is fixed to the through-bolt so as not to be removable. The punchings are compressed by external means and then the thrust nut is tightened against the plate and peened to remain in position. Final tensioning and retensioning is provided by a plurality of set screws circumferentially placed about the thrust nut and extending parallel to the through-bolt. The set screws may be turned, cooperating against one of the compression plates to exert compressive force on the punchings.

Abstract: A core support system is described by which the core structure and frame structure of a dynamoelectric machine can be manufactured independently in parallel operations and later assembled. The support system provides radially resilient support of the core structure while maintaining tangential stiffness by utilizing axially extending spring bars disposed in a cylindrical configuration about the inner periphery of the stator frame structure. The spring bars are rigidly attached to annular frame rings and can be radially deformed to be in firm contact with building bars of the core structure which can be axially slid into the frame during assembly.

Abstract: A rotor, for a synchronous salient-pole electrical machine, having a rim built up in annular layers consisting of segments provided with recesses forming slots on the rim circumference, in which like poles are mounted and which form a plurality of groups distributed in series over the rim circumference, the distances between the adjacent slots in all the groups being the same and different than equal distances between the adjacent slots of different groups. In some of the segments the adjacent recesses are spaced from each other by a distance equal to the distance between the slots within a group.

Abstract: A hydrogenerator comprises a rotor with poles and a stator formed as a ring consisting of separate sectors secured to each other, the angle of every stator sector being of such a value that the product of that value and the number of rotor pole pairs is a multiple of .pi..