An assembly for assembling a winding group of a bar winding for an electric machine is provided. The winding group includes a plurality of bar conductors, each bar conductor having a first leg, a second leg and a bridge portion connecting the first leg to the second leg, and being shaped so that the first and second legs are mutually spread by a predetermined distance. The assembly includes an annular fixture delimiting a plurality of slots, each slot receiving at least one portion of either the first leg or the second leg, a guiding device defining an annular containment housing, receiving at least partially the first and second legs of the plurality of legs of the plurality of bar conductors that are housed in the plurality of slots, forming at least one radial containment wall for the first and second legs.

An exemplary apparatus for impregnating varnish into stator coils of a hairpin winding type stator includes a supporting frame vertically installed on a base frame, a tilting bracket installed upper end portion of the supporting frame to be capable of tilting, a rotary bracket installed on the tilting bracket to be rotatable along a circumferential direction, core chucking members installed on the rotary bracket, inserted into a plurality of bolt engagement hole provided in the stator core, and fixing the stator core to the rotary bracket, a first varnish application unit movably installed on the base frame, and configured to apply the varnish to interior and exterior sides of a crown portion of the stator coils, and a second varnish application unit movably installed on the base frame, and configured to apply the varnish to interior and exterior sides of the welding portion of the stator coils.

A method for manufacturing a laminated iron core including placing a laminated iron core body on a conveyance jig. Downwardly moving the conveyance jig by a lift and downwardly moving an upper die with respect to a lower die of the die unit. The lift being mounted so as to be unaffixed to both the die unit and the conveyance jig. Holding the laminated iron core body placed on the conveyance jig from both sides in a lamination direction of the plurality of iron core pieces between the lower die and the upper die, the lower die coming into contact with the conveyance jig. Injecting a resin into a through hole formed through the laminated iron core body held by the die unit in the lamination direction of the plurality of iron core pieces from the lower die through the conveyance jig or from the upper die.

A winding machine, including a receiving element for receiving a base body including teeth onto which a winding is to be wound, a nail winding head through which a wire can be guided in parallel to a surface of each tooth in order to place the wire inside a groove between two teeth of the base body, so that the tooth can be wound with the wire, and at least one retaining finger, wherein the wire can be positioned inside the groove by the retaining finger independently of the nail winding head in order to determine a target location of the wire inside the groove.

A method includes forming one or more cores, wherein each of the one or more cores has a cross section corresponding to a conductor to be subsequently formed, forming an insulator around the one or more cores, removing the one or more cores to expose one or more recesses within the insulator, and forming one or more conductors in at least one of the one or more recesses of the insulator such that the cross sections of the one or more conductors conform to an interior surface of the one or more recesses in the insulator.

A pre-fitting nest and a method serve for forming a crown from a plurality of U-shaped electrically conductive hairpins to then be able to install the crown in a machine element of an electric machine, e.g., a stator. Here, an accommodating member has a plurality of grooves in which the legs of the hairpins are accommodated. The grooves are annularly disposed about a center and extend perpendicularly to the plane of the accommodating member. With respect to their size and geometry, they are configured such that in each case a first leg of a hairpin rotates within the groove thus to enable an unconstrained positioning of the second leg of the hairpin in another groove. One or several crowns formed from hairpins are provided for introduction into a machine element and inserted into the machine element.

Provided is a motor rotor having a magnet attachment structure that can be used in a severe environment, for example. A motor rotor comprises: a rotary shaft; an annular magnetic body; a metal member; and an annular magnet that surrounds the magnetic body. The magnetic body has two surfaces that face each other in the rotary shaft direction, and a protruding part that protrudes from one surface of the two surfaces in the rotary shaft direction. The protruding part surrounds the rotary shaft. The magnet has two surfaces that face each other in the rotary shaft direction. The metal member is disposed on one surface of the magnet. The metal member surrounds the protruding part. The metal member is interposed between the protruding part and the one surface of the magnetic body.

A method of forming an electric machine lamination includes punching a sheet having a first composition to form a cavity and a compressed region at a perimeter of the cavity. The method further includes depositing, within the cavity and on the compressed region, a deposit material having a second composition different than the first composition. The method further includes scanning a beam along the deposit material to form a bound material within the cavity and on the compressed region.

An alignment apparatus includes a plurality of holders capable of revolving and configured to support at least one of a first leg and a second leg of a segment and hold the segments in an arc-shape-aligned state. A revolving mechanism configured to revolve the holders includes turntables. Adjacent two of the turntables are coupled together via one of link members. For example, the link member is provided between the turntable and the turntable. As a result, a link mechanism is configured.

To prevent the axial compressive force that acts on the rotor core from becoming unnecessarily large and to enable a high-quality magnet embedded core to be manufactured efficiently, a retaining jig (10) for a rotor core (2) including a magnet insertion hole (4) forming a through hole defining openings on end surfaces in an axial direction includes: a first plate (12) configured to contact against one of the end surfaces of the rotor core (2) and including a gate (20) configured to communicate with the corresponding opening of the magnet insertion hole (4); a second plate (14) configured to oppose another of the end surfaces of the rotor core (2); a closure member (26) coupled to the second plate (14) via a compression spring member (28) and configured to be capable of closing the opening of the magnet insertion hole (4) on the other of the end surfaces; and a coupling member (30) that couples the first plate (12) and the second plate (14) to each other such that the closure member (26) closes the opening and a spring force of the compression spring member (28) becomes a prescribed value.