A synchronous generator of a gearless wind turbine is provided. The synchronous generator includes a rotor and a stator. The stator has a stator ring having teeth and slots arranged therebetween for receiving a stator winding. In a circumferential direction, the stator ring is divided into stator segments, each having an equal number of slots. Within a segment, the slots have a substantially equal spacing with respect to each another in the circumferential direction. In at least one connecting region of two segments, the spacing of at least two adjacent slots, which are each assigned to one of two different segments, differs from the spacing of the slots within a segment. The stator winding is formed with form coils. A method for producing a synchronous generator is provided and a use of aluminum and copper form coils in the generator is provided.

A coil end bending jig pushes down a plurality of coil ends of coil segments held by a toric stator core, the plurality of coil ends being arranged on a same circumference. The coil end bending jig includes a plurality of bending units each having a bending tooth that makes contact with a corresponding one of the coil ends, and a guide member having a plurality of guiding slits into which the plurality of bending units is inserted, respectively. The plurality of guiding slits extends from an inner peripheral side of the stator core to an outer peripheral side of the stator core so as not to intersect with each other when viewed from an axial direction of the stator core.

A conductor shaping apparatus rotates one of a first shaping die and a second shaping die about a rotational axis with respect to the other so as to format least one bent portion in a conductor. The conductor shaping apparatus includes a holding section that holds the conductor, a first drive source that applies driving force to the first shaping die and rotates the first shaping die about the rotational axis, a second drive source that applies driving force to the second shaping die and rotates the second shaping die about the rotational axis, and a controller that controls the first and second drive sources so as to rotate one of the first and second shaping dies about the rotational axis with respect to the other and controls the first and second drive sources so as to integrally rotate the first and second shaping dies about the rotational axis.

A synchronous motor with permanent magnets includes a rotor (110) provided with permanent magnets, and a winding (120) formed by overlapping coils located inside a slotless stator (100). The winding coils (120) are regularly distributed all around the 360 of the inside surface of the stator (100) and the ends of the coils are designed such that the winding has the same thickness throughout and the ends of the winding are at least partially inside the slotless stator (100).

Disclosed is a method of manufacturing a stator comprising a winding, preferably a hairpin winding, for an electric machine, in particular an electric motor or generator. The method includes introducing, in particular inserting, winding base bodies into stator slots and additively applying at least one section of at least one winding head, in particular by applying a build-up material in layers and locally selectively solidifying the build-up material by an irradiation with at least one beam impinging on the build-up material and stator.

Bridge portions forming coil end portions, at both ends in an axial direction, of a stator of the rotating electrical machine according to the present invention are configured coaxially about an axis of the stator; at least one bridge portion of the bridge portions of each coil at both ends in the axial direction is located outward of an inner peripheral surface of the stator; and a gap is present between an end surface of a stator core in the axial direction and each bridge portion.

A stator (2) for use in a slotless electric motor (1), particularly an electronically commutated motor, has a winding body (21) in the form of a hollow cylinder, consisting of three or more coils (26), and having a working section (15) located between two winding heads (23, 23) at two longitudinal ends of the winding body (21), and a cylindrical stator lamination stack (22), close-fittingly encompassing said working section (15) of the winding body (21). The two winding heads (23) consist of the longitudinal ends (28) of the three or more coils (26). They positively lock the stator lamination stack (22) along a longitudinal axis (19) of the winding body (21). The two winding heads (23) have the shape of a circular flange with an inner radius (r.sub.wh) essentially equal to an inner radius (r.sub.ws) of the working section (15) of the winding body (21).

A rotating electric machine includes a weld formed by welding end portions of a pair of electric conductors for forming a coil and a weld-insulating member that covers, at least, a surface of the weld. The weld has an uneven portion formed on at least part of the surface thereof. The uneven portion is constituted of a plurality of annular recesses and a plurality of annular protrusions. The annular recesses are formed alternately and continuously with the annular protrusions.

A coil segment, in particular for a stator coil, wherein the coil segment has a conductor bundle, wherein the conductor bundle has a multiplicity of electrical conductors, wherein the conductor bundle has a form fit, wherein the conductor bundle has at least one cutout for feeding coolant. Furthermore, a method for manufacturing a stator coil, a stator coil having a coil segment according to the present invention, a machine having a stator coil according to the present invention, and a vehicle having a machine according to the present invention.

A stator for an electric motor may have a substantially annular shape centered around a central axis and may include a stator core having a plurality of teeth consecutively arranged in a circumferential direction, and a plurality of coils wound around respective teeth of the plurality of teeth. The plurality of coils may be grouped into a plurality of phase groups. The stator may include in association with the respective phase groups: at least one loop wire connecting at least two coils of the respective phase group in series with each other with the at least one loop wire being positioned at a radially inner portion of the stator, and at least two end wires respectively connected to two end coils of the respective phase group. The at least two end wires may be configured to be connected to a power source to energize the coils of the respective phase group.