A method for producing a stator for an electrical machine, the stator having a substantially hollow-cylindrical stator core, which has a plurality of grooves spaced apart in a circumferential direction, the method including: providing at least one strip-shaped winding unit having a first winding conductor with a plurality of groove portions running straight in a transverse direction that are mutually parallel; fastening a first end of the winding unit to a lateral surface of a mandrel; winding the winding unit onto the mandrel such that it is bent around the lateral surface of the mandrel spirally; inserting the mandrel, together with the winding unit, into a cavity in the stator core; and unwinding the winding unit from the mandrel with the groove portions of the winding unit being inserted into the grooves of the stator core.

A winding mat for forming a coil winding of a component of an electric machine has a first wave winding wire and a second wave winding wire. Each wave winding wire has two straight wire sections and two winding heads bent in opposite directions. The first wave winding wire is plugged to a second wave winding wire to join the first and second wave winding wires. A first section of the first wave winding wire crosses a first section of the second wave winding wire at a first cross point. A second section of the first wave winding wire crosses a second section of the second wave winding wire at a second cross point on the first wave winding wire. The first and second cross points are located between ends of respective first winding heads of a first wave section and a second wave section.

A stator includes: a stator core including teeth; pins including a working portion extending in an axial direction in a slot between the teeth; and bus bars electrically connected to the pins. In each slot, the working portions are disposed over stages in a radial direction. The pins include the two working portions disposed across the teeth, a first pin and a second pin each including a connection portion connecting the working portion in a circumferential direction, and a third pin connected to the bus bar. Each of the working portions of the second pin and the third pin is disposed in one of an outermost stage and an innermost stage of the slot. A number of teeth straddled by the second pin is smaller than a number of teeth straddled by the first pin.

The invention relates to a method for producing a coil winding (70) for insertion into radially open slots (82) in a rotor or stator (80) of an electrical machine, wherein the coil winding (70) has a wire pack (60) consisting of a number of wires (32), wherein the wires (32) of the wire pack (60) run parallel to one another and are connected to one another in pairs at one end of the wire pack (60), and wherein the coil winding (70) is formed by a flat winding former which can be rotated about an axis of rotation (26). According to the method, the wire pack (60) is fixed on a winding former (26) and winding heads (42) are produced by displacing fixations of the wire pack (60). The winding shaft (26) can be rotated so that, after carrying out the method, a coil winding (70) is present in the form of a wave winding having wires (32) of the wire pack (60) preconnected in pairs at one end. Such a method allows a particularly space-saving coil winding (70) to be produced, which has a particularly high mechanical stability and requires the least amount of installation space in a rotor or stator (80).

A conductor forming device includes a holder that holds a plurality of straight parts of a plurality of conductors while arranging the plurality of straight parts in parallel to each other, the plurality of straight parts forming a group of straight parts the plurality of conductors. The holder includes a fixed block on which a plurality of grooves each having a fixed side contact part capable of contacting with one end in width directions of the straight part are provided at equal intervals, a plurality of movable blocks that are disposed to be movable in the respective grooves on the fixed block and each have a movable side contact pars capable of contacting with an opposite end in the width directions of the straight part, and a driver capable of driving the movable blocks independently from each other.

A dual-layer wave winding mat for power-dependent component of an electric machine, formed of a first mat and an identical second mat, each having at least one conductor strand which includes at least one conductor formed in parallel webs and winding heads which connect the latter to one another. The webs of the first mat and the webs of the second mat are arranged to alternate in a first mat plane and a second mat plane. The first mat and the second mat are arranged to be offset relative to one another such that a single-layer start region is formed only by the first mat and a single-layer end region is formed only by the second mat.

A method and device for producing a winding mat for a stator or rotor of an electric motor, in which two conductor strands are each fed to a respective receiving device along an X direction. Oppositely disposed winding heads are formed by a shaping tool and a layer step is stamped in the winding heads in the opposite sense in a Y direction. Bars that extend in a Z direction are formed by a movement of the receiving devices on a curved path, and a lifting movement of the receiving devices is carried out. The conductor strands are transferred to a conveying device and transported in X direction by one conveying cycle. The steps are repeated until a winding mat has been produced having a defined quantity of windings formed in each instance by the two conductor strands and in each instance comprise two winding heads and four bars.

A dynamo electric machine stator which is easy to assemble, includes a stator body with stator grooves and a winding mat with groove sections arranged in the stator grooves and lie one over the other in different radial positions, and with head sections which connect the groove sections. A wave winding conductor changes position by precisely one radial position in the stator grooves in the center of the extension of the wave winding conductor in the winding direction. The winding mat includes a first sub-winding mat with one first set of wave winding conductors for each section, the first sets being joined together in an X-shaped manner in the region of the position change such that the conductors are aligned in a specific manner at the intersections between the wave winding conductors.

A stator for an axial flux permanent magnet motor and a motor including the same are disclosed. The stator may include a stator core configured to include a predetermined number of slots in a circumferential direction and a plurality of coils configured to be inserted into the predetermined number of slots and connected to the phases of a multi-phase power supply source. The coil may be coupled to the stator core by an odd-layer winding and an even-layer winding that rotate to form a multi-helical structure so that the odd-layer winding and the even-layer winding may be coupled to the stator core in the multi-helical structure. Thus, the height of end-turns may be shortened and the diameter of the stator may be increased.

A coil element for a coil of an electric machine having at least two conductor elements extending parallel for arrangement in slots of a coil body and at least one connection portion that connects the two conductor elements to one another. The conductor elements and the connection portion are integrally formed. A bending position in a plane defined by the two conductor elements is provided only at a transition from a conductor element to the connection portion, and the connection portion extends in a straight line.