A stator includes a stator core having a yoke extending in a circumferential direction about an axis and a tooth extending from the yoke toward the axis, an insulator having a winding portion surrounding the tooth, and a coil wound around the winding portion of the insulator. The winding portion of the insulator has a first end portion, a second end portion, and a side portion. The first end portion has a maximum thickness T1 in the direction of the axis, the second end portion has a maximum thickness T2 in the direction of the axis, and the side portion has a maximum thickness T3 in the circumferential direction. The maximum thicknesses T1, T2 and T3 satisfy T3<T1<T2. The insulator has a gate mark on the same side as the first end portion in the direction of the axis.

A stator member may include a columnar stator core, a linear coil, and an insulating insulator. The linear coil may be wound around the stator core. The insulator may be disposed between the stator core and the coil. Furthermore, the insulator may include a central member and an outer member. The central member may cover the stator core. The outer member may be connected to an outside of the central member in an axial direction of the stator core. The outer member may include a surface extending in a thickness direction in which the central member and the outer member are arranged, and a groove recessed in a direction orthogonal to the thickness direction from the surface. A connection terminal of a busbar member may be inserted into the groove.

Electrical insulator assemblies fitted onto stator teeth each have a first flange and a second flange. An outer peripheral surface of the first flange has first and second recessed parts on first and second sides of a through hole in a circumferential direction. The first recessed part is open radially outwardly to the first side in the circumferential direction and to a second side in an axial direction. The second recessed part is open radially outwardly to the second side in the circumferential direction and to the second side in the axial direction. The first flange has a projection formed on a side surface on the first side in the circumferential direction and protruding to the first side in the circumferential direction and a projection formed on a side surface on the second side in the circumferential direction and protruding to the second side in the circumferential direction.

A stator core of an electric motor includes a core body, a slot, and an insulating member. The insulating member is integrated with the core body and has a linear expansion coefficient different from the core body. The insulating member includes, at a peripheral wall portion, a plurality of contact portions extending throughout a cylinder axial direction of the stator core and being in contact with the peripheral wall portion, and a noncontact portion positioned between adjacent ones of the contact portions. The noncontact portion extends throughout the cylinder axial direction and is not in contact with the peripheral wall portion. The peripheral wall portion has an inner peripheral wall portion forming a peripheral wall of the slot, and an outer peripheral wall portion forming an outer peripheral wall of the core body. The insulating member is located at at least one of the inner and outer peripheral wall portions.

An electric machine including a shaft, a rotor back assembly surrounding a portion of the shaft, and two or more permanent magnets radially positioned around the perimeter of the rotor back assembly. The electric machine also includes a rotor fan with multiple fan blades formed in an exterior surface of the rotor back assembly and one or more ventilation channels extending through the rotor back assembly. Methods of exporting heat from an electric machine, wither from a machine housing or through the shaft is also disclosed. The heat exportation methods feature the circulation of a fluid with the rotor fan through the ventilation channels and into contact with the housing, or exporting heat from the rotor back assembly through the shaft.

An electric machine comprising a rotor having a rotor body. The rotor body has multiple poles each carrying at least one rotor winding formed from multiple conductor loops. The poles extend in a radial direction of the rotor and the conductor loops pass through slots each formed between two adjacent poles. A support element extending in the radial direction is arranged in each of the slots between the rotor windings of the adjacent poles. The support element applies pressure to the conductor loops when the rotor rotates and/or heats up. A pressure distribution element extending at least in portions in the radial direction along the support element and the adjacent rotor winding is arranged between the support element and the rotor windings, which pressure distribution element distributes the pressure applied by the support element onto the adjacent rotor winding.

A drive assembly having an electric motor, having a stator housing, a stator accommodated therein and having at least one winding, a stator insulation which has a lower part and an upper part, wherein the lower part rests against at least one bearing surface in the stator housing, terminal contacts for the winding, wherein the terminal contacts are held in a contact carrier, which is provided on the lower part of the stator insulation, and a printed circuit board, which rests on at least one supporting surface in the stator housing, wherein the terminal contacts are in contact with associated conductor tracks of the printed circuit board.

In some examples, a connecting ring may connect to a stator coil. The connecting ring may include at least one linear conductor integrally formed in a ring-like shape. Further, the connecting ring may include a terminal section integrally formed in the linear conductor, the terminal section including a hole configured to receive a wire end of the stator coil inserted into the hole in an insertion direction. In addition, the connecting ring may include a cylindrical protrusion having an opening in communication with the hole. The cylindrical protrusion may protrude away from the hole in the insertion direction. Additionally, the connecting ring may include bends for raising a first portion of the connecting ring including the terminal section in the insertion direction relative to a second portion of the connecting ring. An insulating member may cover the second portion of the connecting ring.

A winding support (100) that serves to at least partially accommodate a stator coil of a stator, whereby the winding support (100) has a plurality of protrusions (1, 2, 3, 4, 5, 6) that can each be inserted in an insertion direction (E) into a cavity that is formed by two adjacent stator pole teeth of a laminated core of the stator, whereby at least one of the protrusions (1, 3, 5) has a different length in the insertion direction (E) than at least one of the other protrusions (2, 4, 6).

A stator includes a stator core having a core back and a plurality of teeth, an insulator, and a coil formed by winding a conductive wire on an outer surface of the insulator to laminate a plurality of winding layers, wherein the insulator includes a cylindrical-shaped part with the conductive wire wound, a flange part provided at two ends of the cylindrical-shaped part and expanding in a lamination direction of the winding layers, and a contact part on the cylindrical-shaped part side of the flange part and contacting each of the winding layers in a winding direction; and the contact part includes a slope part inclined in the lamination direction of the winding layers with respect to a winding direction of the conductive wire and guiding the conductive wire from a winding end part of a certain winding layer to a winding start part of a subsequent winding layer.