Embodiments of the currently claimed disclosure are directed to methods for inserting an undulated coil assembly in the slots of a hollow core of a dynamoelectric machine. In some embodiments, the method can include positioning at least a first coil portion of the coil assembly around a support member, aligning a guide device with respect to end faces and the slots of the core, feeding the first coil portion from the drum support member along the guide device to insert adjacent superimposed linear portions (LI) of the coil assembly in the slots, engaging the superimposed linear portions (LI) along at least one guide surface during the feeding, and relatively moving the core with respect to the guide assembly device to position the slots for receiving the superimposed linear portions (LI).

The present disclosure provides a stator of an electric rotating machine, a hairpin of a stator of an electric rotating machine, and a manufacturing method thereof. The stator for the electric rotating machine comprises a stator core, and a stator coil comprising hairpins. Each hairpin comprises a conductor, a film surrounding the conductor, a pair of insertion parts configured to be inserted into different slots, and a connection part connecting the insertion parts. The connection part comprises first and second bending parts bent with a predetermined radius of curvature such that the pair of insertion parts are insertable into different layers. The hairpins include first and second hairpins, each of the first and second hairpins configured to protrude from one end of the stator core by different protrusion lengths. Each of the first and second hairpins comprises a region configured to cross each other.

The present invention relates to a method and an apparatus for forming a hairpin-shaped winding element from a conductor.

A conductor wire insulating film separating method disclosed includes: a preparing step involving preparing rectangular cross-section coil pieces each of which is a conductor wire coated with insulating film and used to provide a stator coil of rotary electric machine; a delivering-in step involving, after the preparing step, delivering coil pieces into a laser separator, with coil pieces aligned such that extremities thereof are adjacent to each other; an applying step involving, after the delivering-in step, continuously applying film removing laser to the extremities of the aligned coil pieces such that the laser is applied to one extremity and then to another extremity, thus removing at least portions of the insulating film from the extremities of the coil pieces; and a delivering-out step involving delivering the coil pieces, from which the at least portions of the insulating film have been removed by the applying step, out of the laser separator.

The invention is directed to an apparatus (100) and a method for manufacturing a partial nest or a nest (5) of pin conductors (1, 1.sub.i, 1.sub.o) for forming a stator. The apparatus (100) comprises a stator core template (10) with a block body (11) and radially extending ribs (12) forming slots (13) there between for insertion of legs (2, 2.sub.i, 2.sub.o) of the pin conductors (1, 1.sub.i, 1.sub.o). The apparatus (100) comprises at least one ring element (25, 33, 42) being arranged to provide an outer radial abutment face for inserted pin conductors (1, 1.sub.i, 1.sub.o).

A hairpin alignment device for the hairpin winding motor according to an embodiment includes a rotation unit in which the dummy core is mounted in the center and rotates the dummy core by a first predetermined angle in correspondence with the number of slots, an alignment unit disposed on the upper surface of the rotation unit, and including a plurality of push bars disposed along the upper end circumference of the dummy core and reciprocating in a radial direction with respect to the hairpin, a guide unit disposed on the side of the rotation unit, selectively operating with the hairpin overlapped in each layer when pre-aligning the hairpin to the slot, and moving the overlapping hairpin outward in a radial direction to secure an inserting space of the hairpin, and a handling gripper adjacent to the rotation unit and supplying the hairpin to the slot.

A method for stripping a rod-shaped conductor using laser radiation is provided. The rod-shaped conductor includes an electrically conductive core and a coating that is at least partially transparent to the laser radiation. The method includes traversing the conductor for a first time with at least one laser beam to at least partially reduce transparency of the coating, and traversing the conductor for a second time with the at least one laser beam to at least partially reduce adhesion of the coating.

An object of the present invention is to suppress variations in an angle of a shoulder part of a segment coil to improve easiness in inserting segment coils in a stator core.

A stator of an electric motor according to the present invention includes a stator core 12 in which a plurality of slots 12a are formed, and a plurality of segment coils 11 of U shapes inserted respectively in the plurality of slots 12a.

The segment coil 11 includes a shoulder part 11a and a shoulder part 11b that are bent to form a U shape. In a front view of the U shape, a press mark 100a is formed on the shoulder part 11a and on the shoulder part 11b, the press mark being a dent sinking in a front-to-rear direction, from a front surface of the shoulder part 11a and from a front surface of the shoulder part 11b. The press mark 100a is formed also on a back surface of the shoulder part 11a and on a back surface of the shoulder part 11b.

An electromagnetic coil where a conductive member is wound so as to surround an air core region includes an effective coil portion, a first coil end portion, and a second coil end portion. The effective coil portion is formed of a coil-use conductive wire formed by bundling a plurality of conductive base members, the first coil end portion is formed of a first end member that is made of a solid conductive material, and the second coil end portion is formed of a second end member made of a solid conductive material. In the air core region of “one magnetic material” to which an electric current of a first phase is supplied, the effective coil portion of “the other electromagnetic coil” to which an electric current of a second phase is supplied is fitted.

In the formation of coil windings of an electrical machine, the invention provides a ring arrangement device for forming a ring arrangement from a plurality of concentrically arranged rings of electrical conductors to form a coil winding of a component of an electrical machine, comprising a collecting receptacle with a plurality of grooves arranged in a ring around an axis and delimited by radial webs and a ring positioning device for the relative axial positioning of one or more of the rings, wherein the ring positioning device has a support device for supporting the electrical conductors of one of the rings to be inserted in an axial insertion position and one holding device for holding the conductors in a storage position, in which the conductors of a completely inserted ring are moved further into the collecting receptacle.