A method for manufacturing a rotor for a rotary electric machine, the method including supporting a workpiece including a rotor core and a rotor shaft that is hollow and disposing the rotor shaft on an inner diameter side of the rotor core. Using an actuation member that is positionable in a hollow interior of the rotor shaft, having a cavity on a radially inner side, and is radially displaceable or deformable, so the actuation member radially faces or contacts a molding pressurization region on an inner peripheral surface of the rotor shaft. Applying a force in a radial direction to the actuation member while bringing the drive member into contact with a contacted portion of the actuation member in the cavity by applying a force in an axial direction to the drive member.

A system includes a rotor core; a rotor stack extending circumferentially from the rotor core, the rotor stack including: a first end; a second end opposite to the first end; and a first slot in the rotor stack, the first slot extending from the first end to the second end; and a hairpin cooling pipe in the first slot of the rotor stack.

A laminated-core segment includes a plurality of axially layered metal sheets. Each metal sheet includes a yoke having grooves, teeth, and a yoke rear which connects the teeth, with at least some of the teeth having axially aligned recesses on a groove distal side of the metal sheet.

A laminated-core segment includes a plurality of axially layered metal sheets. Each metal sheet includes a yoke having grooves, teeth, and a yoke rear which connects the teeth, with at least some of the teeth having axially aligned recesses on a groove distal side of the metal sheet.

A stator for an electric machine includes a laminated stator core having stator slots arranged along an axial direction parallel to a stator axis, electric conductors arranged in the stator slots; and fluidtight slot insulators arranged in the stator slots between the electric conductors and the laminated stator core, wherein the slot insulators each have a cooling channel spaced apart from the electric conductors in a radial direction arranged orthogonally to the axial direction.

A stator for an electric machine includes a laminated stator core having stator slots arranged along an axial direction parallel to a stator axis, electric conductors arranged in the stator slots; and fluidtight slot insulators arranged in the stator slots between the electric conductors and the laminated stator core, wherein the slot insulators each have a cooling channel spaced apart from the electric conductors in a radial direction arranged orthogonally to the axial direction.

A machine assembly configured to process a roll of sheet metal to form a laminated core is provided. The assembly includes an uncoiler configured to uncoil the roll of sheet metal. An adhesive application apparatus arranged downstream of the uncoiler is configured to apply an adhesive to the sheet metal. A first curing apparatus is arranged downstream of the adhesive application apparatus and is configured to partially cure the adhesive. A stamp and punch machine is arranged downstream of the first curing apparatus and is configured to stamp and punch the sheet metal to form stamped metal pieces. A stacking apparatus is configured to form a stack of the stamped metal pieces. A second curing apparatus is configured to fully cure the adhesive between each stamped metal piece in the stack to form the laminated core.

The present disclosure relates to a stator tooth unit (10) for a stator (110). The stator having an axis (111) and a plurality of stator tooth units (10) which are circumferentially arranged around the axis (111). The stator tooth unit (10) comprises a stator tooth (20), an insulation (30), and a coil (40). The stator tooth (20) defines a radially outer side (20a) and a radially inner side (20b). The radially inner side (20b) is opposite to the radially outer side (20a). The stator tooth (20) further defines a first circumferential side (20c) and a second circumferential side (20d). The second circumferential side (20d) is opposite to the first circumferential side (20c). The insulation (30) is at least partially covering the stator tooth (20). The coil (40) is wound around the partially covered stator tooth (20). The insulation (30) comprises an insulation wall (32) which extends away from the stator tooth (20) on the first and second circumferential sides (20c, 20d). The insulation wall (32) comprises a sealing structure (54, 56) on at least one circumferential side (20c, 20d). The sealing structure (54, 56) is configured to form a sealing (50) with the insulation wall (32) of an adjacent stator tooth unit (10).

A device includes a stator or a rotor configured to magnetically coupled through an air gap, a plurality of slots distributed along a perimeter of the stator or rotor, a plurality of metal bars each placed into one of the plurality of slots, and an end ring having plurality of openings. Each opening is configured to receive an end of one of the metal bars, and a lock feature is configured to improve a mechanical attachment between the end ring and the metal bar.

A device includes a stator or a rotor configured to magnetically coupled through an air gap, a plurality of slots distributed along a perimeter of the stator or rotor, a plurality of metal bars each placed into one of the plurality of slots, and an end ring having plurality of openings. Each opening is configured to receive an end of one of the metal bars, and a lock feature is configured to improve a mechanical attachment between the end ring and the metal bar.