An electric machine includes a stator core and interconnected hairpins attached to the stator core and defining a path. A pair of the interconnected hairpins have first and second ends, respectively, and are circumferentially spaced apart from each other. A jumper is interconnected between the first and second ends. The jumper has a body defining first and second holes that receive the first and second ends, respectively. The first hole is defined by a perimeter having opposing first and second walls and opposing third and fourth walls.

The invention relates to a stator for an electric machine, comprising a plurality of rod conductors and a plurality of interconnection pieces. The interconnection pieces each have a curved shape, in particular the shape of a C, extending in the radial direction and about the axis of rotation of the stator; in order to form respective interconnection planes along the axis of rotation, each group of interconnection pieces is arranged in the region of at least one short end of the rod conductors of the associated group of rod conductors that are to be electrically connected. The invention further relates to a connection component and an electric machine.

A method of manufacturing a stator of a rotary electric machine includes heating a stator core so as to expand the stator core. The stator core has a hollow cylindrical shape and includes slots. The method includes inserting conductor groups in the slots of the heated stator core. The conductor groups each include segment conductors. The method includes cooling the stator core where the conductor groups are inserted so as to provide an interference between each of the slots and a corresponding one of the conductor groups.

A guide member includes a first diametrically directed side guide section and a second diametrically directed side guide section formed by bending a single member at a bent portion. The first diametrically directed side guide section guides predetermined portions of electric conductors on a diametrically directed side of a slot. Further, the second diametrically directed side guide section guides predetermined portions of the electric conductors on a diametrically directed side of another slot adjacent to the slot. The bent portion is supported by a supporting body.

A positioning and fixing apparatus that fixes a position of a stator core includes a plurality of positioners that are displaced so as to approach or separate from the stator core, by a positioner displacing unit. One of the positioners is an engager that engages with a first tab section being an engaging section. First, the engager engages with the first tab section, and then, pressers being the remainder of the positioners position a certain region of the stator core.

A plurality of coil groups are each configured by connecting a tip portion of a first conductor terminal and a tip portion of a second conductor terminal that is subject to connection therewith using a connecting conductor, and the connecting conductors include: a pair of connecting portions that are respectively disposed so as to contact the tip portion of the first conductor terminal and the tip portion of the second conductor terminal that is subject to connection therewith in a circumferential direction of the tip portions so as to be parallel to the tip portions, and that are joined together with the tip portions; and a linking portion that links the pair of connecting portions.

Disclosed is an apparatus According to the present invention, a new winding arrangement was developed to enhance the manufacturability of stators with large length to diameter ratio and small aperture diameters such as the ones designed and manufactured for downhole pumping applications. The rectangular conductors are pre-formed to a specific shape, nested together, and inserted into the stator slots. Once the conductors are inserted, additional bending and joining operations are required to complete the coils and phases. These operations can be either fully automatic or semi-automatic. The structure of the winding allows insertion of phase and phase to phase insulation after the joining operation is completed thus reducing the risk of damage to the insulation system during the joining process. The pre-formed winding due to its ability to nest by design results is very short end-turns compared to conventional winding

The basic coil segment is arranged in the slot such that at least part of the basic coil bent portion is arranged outside the insertion end, in an axial direction parallel to a center axis of the stator core and the pair of the basic coil insertion end portions is arranged outside the welded end, in the axial direction. The power coil segment is arranged in the slot such that the power coil lead end portion and at least part of the power coil connection portion are arranged outside the insertion end, in the axial direction and the power coil insertion end portion is arranged outside the welded end, in the axial direction. The height of an end surface of the basic coil segment from the insertion end is equal to the height of an end surface of the power coil segment from the insertion end.

Apparatus and method for winding coils of dynamoelectric machines, wherein a coil comprises members formed of leg portions (19a, 190a). The leg portions (19a, 190a) being inserted in slots (17, 170) of cores (18, 180) of the dynamo electric machine, wherein the slots (17, 170) are provided with insulation members (33, 330) for lining the walls of the slots (17, 170). The leg portions (19a, 190a) are inserted in the slots (17, 170) of the cores (18, 180) of the dynamoelectric machines. A passage member (20, 200) having passages (22, 220) is provided aligned with a core (18 ,180) to align the passages (22, 220) with the slots (17, 170). The area (23, 230) adjacent an edge of a passage (22) is aligned with the end (32, 320) of an insulation member (33, 330) of a slot (17, 170) for engaging the end (32, 320) of the insulation member (33, 330) during insertion of the leg portions (19a, 190a).

A coil segment forming apparatus includes a second bending section for bending a first bent body consisting of a pair of slot insertion portions that are substantially parallel to each other and a linking portion for connecting the pair of slot insertion portions formed in the same plane. The bending of the first bent body is carried out in a plane perpendicular to the aforementioned same plane. The second bending section has a plurality of pairs of press jigs arranged to oppose to each other in directions intersecting with the aforementioned same plane for pinching and pressing the linking portion, and a plurality of drive mechanisms for moving respectively the plurality of pairs of press jigs in directions intersecting with the aforementioned same plane based on moving amounts respectively set depending on forming conditions of the coil segment to be formed.