A wedge for use between poles of a generator for supporting windings of the poles includes a plurality of outer walls. The wedge also includes at least one fluid orifice extending through at least one of the plurality of outer walls and configured to receive a fluid from a shaft of the generator and to allow the fluid to flow through the at least one of the plurality of outer walls to reduce a temperature of the windings.

A rotary electric machine stator (2) includes a stator body (20) and a stator winding (22) supported by the stator body (20), in which the stator body extends around an axis (X) while being delimited by an internal radial surface (3) and an external radial surface (4), said stator bodies having a plurality of teeth (6) formed respectively between two slots (5) arranged in said stator body from the internal radial surface and extending axially to receive at least one stator winding element (22). The stator has at least one deformed tooth (6) which comprises, at its loose end (7) helping to define the internal radial surface, at least one protrusion (10) extending across an adjacent slot, said protrusion (10) being obtained by material deformation of said deformed tooth (6).

A wedge for use between poles of a generator for supporting windings of the poles includes a plurality of outer walls. The wedge also includes at least one fluid orifice extending through at least one of the plurality of outer walls and configured to receive a fluid from a shaft of the generator and to allow the fluid to flow through the at least one of the plurality of outer walls to reduce a temperature of the windings.

A rotor assembly for an electric generator, comprising a rotor element, conductive rotor windings and a plurality of rotor slot wedges. The rotor element comprises rotor teeth and rotor slots. At least a first rotor slot wedge is in a first rotor slot and has a shape that encompasses a rectangular prismatic shape and first and second protrusions. At least a first edge on an end surface of at least a first rotor slot wedge has a degree of smoothness as specified herein, and/or is radiused (as defined herein). Also, methods of refurbishing an electric generator, comprising radiusing at least a portion of at least one edge of a wedge. Also, removing a wedge from rotor element, radiusing at least one edge of the wedge, and inserting the wedge into a rotor element.

A tool system for tightening a retrightenable wedge system in a slot of a generator stator core is presented. The tool system includes a carriage assembly and a wedge tool assembly that is pivotally coupled to the carriage assembly. The carriage assembly includes motorized drives that axially moves the tool system along the slot and holds the tool system on the slot at an axial position. The wedge tool assembly includes a torqueing socket to tighten the retightenable wedge assembly in the slot. The torqueing socket is driven by a worm gear arrangement.

A stator assembly for an electric motor assembly is provided. The stator assembly includes an annular body extending about a central axis. The annular body includes an inner surface and an outer surface. The annular body has a first thickness defined between the inner surface and the outer surface. The stator assembly also includes at least one stator tooth extending radially from the annular body. The at least one stator tooth includes a first tip spaced radially from the annular body. The at least one stator tooth has a second thickness. A ratio of the first thickness to the second thickness is at least about 1.1.

A rotating electric device comprising: an outer stator (210) comprising an outer stator iron core (211) having a plurality of outer stator winding slots (213) formed on the inner peripheral surface thereof at a predetermined interval in the circumferential direction, and an outer winding (510) wound around an outer stator iron core tooth (218) relatively formed by a pair of outer stator winding slots (213) adjacent to each other; an inner stator (220) comprising an inner stator iron core (221) having a plurality of inner stator winding slots (223) formed on the outer peripheral surface thereof at a predetermined interval in the circumferential direction; and a rotor (300) having, between the outer stator (210) and the inner stator (220).

An assembly and a method for preventing an axial migration of a spring in a generator rotor are presented. The assembly includes a step pin radially disposed through an amortisseur and inserted into a spring of the generator rotor. The step pin is arranged axially apart from an adjacent radial vent passage and radially extends through the spring into a slot clearance between the spring and a creepage. The amortisseur includes a counter bore to retain a pin head and a pin shoulder. The spring includes a pin hole for a pin body extending therethrough. Diameters of the counter bore and the pin hole are smaller than diameters of amortisseur radial vent aperture and spring radial vent aperture. The step pin prevents an axial migration of the spring in rotor slots.

A method is provided for producing a slot base insulation in a stator (210, 220), wherein the stator (210, 220) is part of an electrical machine and is constructed from a ferromagnetic material. The stator (210, 220) is provided with at least one slot (204) to fit a winding wire (122) in the at least one slot (204). The at least one slot (204) is coated with a soft-magnetic insulation material. A stator (210, 220) also is provided with the slot base insulation.

A wedge for securing windings in a slot in the rotor poles of a rotor core of an electrical machine includes an elongate wedge body extending in an axial direction along a longitudinal axis. The wedge body includes layers perpendicular to the axial direction. The layers vary in electrical conductivity from layer to layer to inhibit eddy currents within the wedge body.