Abstract: A stator end-winding system is proposed in which the bars of the winding are bent outwards and describe a hollow cone. The supporting proceeds by a wedge-like braced inside ring, a segmented outside ring and supports which also have a wedging effect. The bracing of the inside ring and outside ring is made by tie rods, the outside ring is azimuthally tensionable. Therefore, it can be placed over mentioned cone described by the bars without the necessity of disassembling the stator end-winding system.

Abstract: A method of repairing the rotor showing tooth top cracking of a turbogenerator, wherein after removal of the rotor from the stator and of the existing retaining rings, the winding is protected with suitable cover materials, including sealing the whole with parafine, the entire shrink fit area is dry machined to an optimized geometry, the machined area is deburred, and after removal of the burrs and the covering and sealing material new retaining rings are fitted. The main advantage is the possibility to carry out the method on site.

Abstract: A stator end-winding system is proposed in which the bars of the winding are bent outwards and describe a hollow cone. The supporting proceeds by a wedge-like braced inside ring, a segmented outside ring and supports which also have a wedging effect. The bracing of the inside ring and outside ring is made by tie rods, the outside ring being azimuthally tensionable. Therefore, it can be placed over the above-mentioned cone described by the bars without the necessity of disassembling the stator end-winding system.