Embodiments of this application disclose a stator, a stator manufacturing method, a motor, and an electric vehicle. The stator includes: a stator tooth part, where a plurality of stator tooth parts are arranged at intervals along a circumferential direction; and a stator yoke part, where the stator yoke part is disposed along a circumferential direction of the stator tooth part, and the circumferential direction is a circumferential direction around a central axis of the stator; where the stator tooth part and the stator yoke part are integrally formed by an oriented silicon steel sheet, and a grain direction of the formed oriented silicon steel sheet points to the central axis of the stator along a radial direction. Therefore, the stator tooth part and the stator yoke part are formed by using one material, and there is no need to splice two materials, thereby reducing process costs.

A coil conductor of each of a U-phase, a V-phase, and a W-phase is provided with a configuration in which a terminal wiring conductor, a first tooth conductor wound around a first tooth, a bridging line conductor, a second tooth conductor wound around a second tooth, and a neutral-point connection conductor are connected in this order. The terminal wiring conductor is connected to the first tooth conductor at an upper side of an insulator. The bridging line conductor is disposed on an upper side of the insulator disposed on a stator core and along an outer side portion of a tooth of another phase. The neutral-point connection conductor is connected to the second tooth conductor at a lower side of the insulator.

A method for integrally manufacturing a stator core and a housing for an electrical machine includes printing, by a three-dimensional (3D) printing process, the stator core. In addition, the method includes printing, by the 3D printing process, the housing. In particular, printing the housing occurs contemporaneously with printing the stator core. The method also includes printing, by the 3D printing process, at least one end cap and coupling the at least one end cap to the housing to enclose a cavity defined by the housing.

An apparatus for manufacturing a stator includes a placement table, a supporting member and a resistance heating device. The placement table is configured to have a stator core, which has coil segments and insulators inserted in slots thereof, placed thereon. The stator core is formed of steel sheets that are laminated in an axial direction of the stator core. The coil segments together form a stator coil. The insulators are formed of a material that is foamable upon being heated. The supporting member is configured to support, in the axial direction of the stator core, distal end portions of teeth of the stator core so as to prevent gaps from being formed between the steel sheets forming the stator core. The resistance heating device is configured to heat, through energization of the stator coil, the insulators along with the stator coil and thereby cause the insulators to foam.

A segmented stator for an electric motor comprises: a plurality of tooth segments arranged in a circular configuration, the tooth segments having body portions and front surfaces extending inward from the body portions; and wire wound on the body portions. A distance between adjacently positioned front surfaces of the tooth segments is less than a width of the wire. The wire wound on the body portions substantially fills space between adjacently positioned tooth segments.

A coil insertion apparatus includes a coil diameter expander that expands a diameter of a coil assembly in a wound state from inside a stator core to insert the coil assembly into slots of the stator core, the coil diameter expander including a coil end pressing part that presses coil ends of the coil assembly from inside toward outside to expand the diameter, and a coil straight part pressing part that presses coil straight parts of the coil assembly to be inserted into the slots from inside toward outside to expand the diameter.

An electric machine includes a stator and a rotor. The stator has a yoke fitted over a ring that has a plurality of teeth with gaps therebetween for fitting metal windings. The ring of teeth has an inner circumference that is closed and to connect the teeth, and an outer circumference with open gaps or slots between the teeth. The metal windings are fitted through the open outer circumference. Regions of the closed inner circumference between the teeth are treated such that the region's magnetic permeability is reduced relative to the remainder of the stator. The reduction in magnetic permeability provides a magnetic flux barrier between the teeth.

A method for producing a winding for a stator, the stator itself, a method for producing the stator and an electric rotating machine.

The method for producing a winding for a stator of an electric rotating machine provides a first conductor and a further conductor, wherein the two conductors are bent into a zigzag form, at least in length portions, and the further conductor is moved with respect to the first conductor in a combination movement, which has a translatory movement component along the longitudinal axis of the further conductor and a rotary movement component about the longitudinal axis of the further conductor, such that the further conductor winds around an extreme value axis of the first conductor, which runs through regions f the first conductor, said regions forming extreme values of the zigzag course. The method for producing a winding for the stator, and the stator itself, the method for producing the stator and the electric rotating machine provide solutions that permit the winding, and accordingly also the stator comprising the winding and the electric rotating machine comprising the stator, to be produced at low cost and with little effort.

The disclosure relates to a brushless and magnet-free synchronous electrical machine, wherein it comprises a stator (20) comprising a ring (22), a winding (28) and a tooth system (24) comprising teeth (26) extending parallel to the axis of rotation from the ring (22), said winding being wound around the tooth system (24), a rotor (10), comprising a first portion (12a) extending in p preferred directions (18a), a second portion (12b) extending in p preferred directions (18b) shifted by p with respect to the preferred directions of the first portion (18a), and an intermediate portion (14) linking the first portion (12a) to the second portion (12b), and a coil (40) for exciting the rotor, fixed with respect to the stator, supplied with a DC electric current, positioned around the intermediate portion (14) of the rotor and configured so as to generate an electric flux in the rotor (10) through magnetic induction.

A device for producing a stator for an electrical machine includes a segment feed for feeding stator segments, a cylindrical press for pressing the stator segments, a housing feed for feeding stator housings, and a mandrel for receiving the stator segments. The mandrel includes an axial direction, a first region with a first radius, a second region arranged axially below the first region with a second radius that is less than the first radius, and a third region arranged axially below the second region with a third radius that is less than the second radius. In an example embodiment, the mandrel is movable from the segment feed to the cylindrical press, from the cylindrical press to the housing feed, and from the housing feed to the segment feed.