A stator winding includes a plurality of conductors including ducts. The ducts can be connected to a heat pipe or a conduit providing a coolant flow to directly cool the winding. The heat pipe can be connected to a heat exchanger that includes a coolant flow. The stator winding can be produced using additive manufacturing, with hollow ducts extending through leg sections and solid end sections. The heat exchanger can also be additively manufactured. A circuit for driving an electrical machine can be in thermal communication with the heat exchanger, such that the thermal system manages both the stators and the drive circuit.

The stator core is divided into an annular part and a plurality of teeth, including a tooth main part and a distal end part, having a larger circumferential width than a circumferential width of the tooth main part, and the annular part includes a plurality of fitting grooves, in the circumferential direction on an outer peripheral surface, extending in an axial direction and having a sectional shape with a narrowed part on an open side. Each of the teeth includes, at a base end part, a fitting part having a sectional shape that allows the fitting part, fitted into a fitting groove, inserted into the fitting groove of the annular part in the axial direction fitted to the annular part in an undetachable manner in a radial direction, and the fitting part has a maximum width in the circumferential direction smaller than the circumferential width of the tooth main part.

An axial gap motor stator core includes a yoke portion made up of a metallic plate member or the like and including a lock portion and a tooth portion constituting a dust core including a lower surface which is a locking target to be locked on the lock portion. An axial gap motor stator core manufacturing method includes forming a yoke portion including a plurality of lock portions, which are projecting portions, by pressing, for example, a metallic plate member and fixing the tooth portion to the yoke portion by inserting the lock portions into the tooth portion.

A rotary electrical machine is equipped with a rotor that is rotatably supported, and a stator having a stator core that is disposed coaxially with the rotor. The stator core is configured as a plurality of stacked steel plates, and has a yoke portion that is of annular shape, a plurality of teeth extending radially from the yoke portion, and slots between adjacent teeth. A stator winding is wound in the slots. The yoke portion has holes that extend in the stacking direction of the steel plates, at positions of radial-direction extension of the slots, and molded powder bodies formed from a magnetic powder are provided within the holes.

The invention relates to a method for producing a lamination stack for a rotor and/or a stator of an electric machine, wherein the lamination stack is produced of a stack of disk- or ring-shaped sheet metal laminations which are assembled of sub-segments that each have a radial outer edge, a radial inner edge and two lateral edges, wherein the sub-segments are stamped out of a sheet metal strip having a strip longitudinal direction that corresponds to a rolling direction of the sheet metal strip. In accordance with the invention provision is made in that for the purpose of stamping-out of the sheet metal strip first sub-segments are arranged in a first row and second sub-segments are arranged in a second row and stamped out, wherein the first row and the second row run in the strip longitudinal direction of the sheet metal strip and lie next to each other, in that the first sub-segments in the first row are aligned identically with respect to each other, wherein the radial outer edge and/or the radial inner edge run transversely to the longitudinal direction of the strip, and in that the second sub-segments in the second row are arranged identically with respect to each other, with radial outer edges and/or radial inner edges running transversely to the longitudinal direction of the strip, but diametrically opposed to the first sub-segments in the first row on the sheet metal strip.

One embodiment relates to a stator unit and a motor comprising same, the stator unit comprising: a stator core; a coil wound around the stator core; and an insulator disposed between the stator core and the coil, wherein the stator core comprises a support part, and a coil winding part disposed on both side surfaces of the support part so as to protrude therefrom, wherein the support part and the coil winding part are disposed so as to form a cross shape. Accordingly, a coil space factor may be increased by using the cross-shaped stator core.

Systems and methods for manufacturing stators for electric submersible pumps, where a stator core having an inner portion and an outer portion is formed. The inner portion has a plurality of teeth and outward-facing slots. Magnet wire coils are formed on the inner portion by holding the inner portion in a stationary position and using a linearly movable robotic arm to position the magnet wire in each slot while preventing the wire from sliding axially with respect to the stator and adjacent turns of the coil. After forming the magnet wire coils on the inner portion of the stator core, the outer portion of the stator core is press-fit onto the inner portion to close the slots. The magnet wire can thereby be positioned to maximize the fill factor of each slot and increase power density for a given temperature rise.

A stator core assembly for an axial flux electric motor for an automobile includes a cylindrical outer case that defines a central axis, first and second disk shaped insulate frames axially spaced from one another and positioned within the outer case, each of the first and second insulate frames including a circular outer ring, a circular inner ring and a plurality of radial spokes extending between the outer ring and the inner ring and spaced circumferentially about the central axis, and a plurality of segmented core sections extending axially between the first and second insulate frames spaced circumferentially around and supported by the first and second insulate frames, wherein, a radial spoke is positioned between each adjacent pair of segmented core sections, and at least one radial spoke extends across each axial end of each one of the plurality of segmented core sections.

A stator includes a yoke extending in a circumferential direction about an axis line, a tooth extending from the yoke in a first direction toward the axis line, and a coil wound around and fixed to the tooth. The yoke has an inner wall surface facing the axis line. The tooth has a root part connected to the yoke. The inner wall surface of the yoke is a flat surface extending from an end of the root part of the tooth in the circumferential direction to an inner circumferential side relative to a plane passing through the end and perpendicular to the first direction.

A core piece that is circularly arranged to construct a stator core of an axial gap type rotary electric machine includes: a first member in a column form extending in an axial direction of the stator core; a second member in a plate form disposed on a first end side of the axial direction in the first member; and a third member in a plate form disposed on a second end side of the axial direction in the first member, the first member has a peripheral surface connecting with the second member and the third member, the second member has a protruding portion projecting outwardly from the peripheral surface of the first member, the third member has a protruding portion projecting outwardly from the peripheral surface of the first member, and the first member, the second member, and the third member are configured by an integrally molded green compact.