A rotor assembly includes: a shaft; a rotor core having a through-hole which is formed in an axial direction (A) and into which the shaft is inserted; a magnet inserted into an inner space of the rotor core; and a plate provided in close contact with one side of the rotor core in the axial direction (A). The plate includes a protrusion formed in a region, which faces a region between the magnet and the circumference of the rotor core, and protruding toward the rotor core.

The invention relates to an electric machine (1) comprising a stator (10) and a rotor (20) separated from the stator (10) by way of an air gap, wherein the rotor (20) has a plurality of shell-like magnet segments (30) secured to a rotor body (22), and wherein the magnet segments (30) have in the circumferential direction in each case a plurality of sections (32, 33, 34) with different magnetic polarizations, which each form a magnetic pole of the rotor (20), and wherein transition zones (36) are formed between the sections (32, 33, 34) of the magnet segments (30) with different magnetic polarizations, wherein recesses (40) are provided in the magnet segments on the side facing the stator (10). It is proposed that the transition zones (36) are formed so as to run obliquely in the axial direction of the rotor (20) and that the transition zones (36) are formed in the region of the recesses (40).

A joining tool (10) is provided for pressing a disk (12) to a shaft (14) that has opposite first and second ends. The first end (18) of the shaft (14) is received in a press table (22) and the second end (24) of the shaft (14) is received in a centering receptacle (26). A press plate (34) axially presses the disk (12) onto the shaft (14). A resilient ram (40) is provided on a side of the press plate (34) that faces toward the disk (12) and compensates for an axial run-out of the disk (12) relative to the press plate (34). The resilient ram (40) of the joining tool (10) enables the disk (12) that has an axial run-out to be pressed onto the shaft (14) in a correspondingly sloped manner, with the result that a rotor shaft (16) with a satisfactory bond is made possible.

The rotor includes a drive shaft, a first rotor core unit, and a second rotor core unit. The first rotor core unit is configured from a first iron core material having a through-hole into which the drive shaft is inserted, and a plurality of first permanent magnets, and includes a first reference surface at which the first iron core material is flush with or protruding further than first permanent magnets. The second rotor core unit is configured from a second iron core material having a through-hole into which the drive shaft is inserted, and a plurality of second permanent magnets, and has a second reference surface at which the second iron core material is flush with or protruding further than second permanent magnets, the second rotor core unit being laminated in an axial direction on the first rotor core unit such that the first reference surface and the second reference surface contact each other.

A stator (1) for an electric machine (100) has stator laminations (3) stacked in an axial direction (A) to form a stator lamination stack (2). The stator laminations (3) have strip-shaped inserts (4) extending in a radial direction (R). The inserts (4) have a higher thermal conductivity than the rest of the stator lamination (3). The stator laminations (3) are rotated in relation to one another in an azimuthal direction (U) about an angle of rotation (D) in such a manner that the inserts (4) of directly adjacent stator laminations (3) are not arranged one above another in the axial direction (A). An electric machine (100), a motor vehicle (200) and a method for producing a stator (1) also are provided.

A rotary electric machine includes: a rotary shaft member; first and second rotor including first and second rotor core, respectively, including first and second permanent magnets having first and second polarity, first and second magnet-based magnetic pole portions having the first and the second polarities and being formed by the first and the second permanent magnets, and first and second iron core portions having the second and the first polarities and being formed by iron pole portions of the first and the second rotor core, are alternately arranged in a circumferential direction of the first rotor core; a stator; and a field yoke. Further, the first magnet-based magnetic pole portion and the second iron pole portion face each other and the first iron pole portion and the second magnet-based magnetic pole portion face each other in the axial direction.

A rotary electric machine comprises: a rotor which has a rotor core and permanent magnets arranged in the rotor core on its outer circumference side, and which is supported rotatably; and a stator which has a stator core having teeth projecting toward a radial center and arranged circumferentially, and which is located coaxially with the rotor to be spaced apart from the outer circumferential surface of the rotor; wherein, on a condition that a ratio of the circumferential width of each of sub poles to the circumferential width of each of main poles is 0.625 or less, a top width of each of the teeth is set on the basis of two calculation formulas to be used differently according to the rotor skew angle.

A skewed rotor core assembly having a resin mold disposed in a plurality of longitudinal channels and a resin flow path is provided. The rotor core has a first and second magnet stack each defining a plurality of longitudinal channels. The plurality of longitudinal channels for the first stack are misaligned with the plurality of longitudinal channels for the second stack. Methods of making the same are also provided.

A rotor includes a shaft, a rotor core with core pieces arranged axially, and a plate between adjacent core pieces and surrounding the shaft. The shaft includes an axial first hole, and a second hole opened to outside of the shaft and connected to the first hole. One side of the plate in the axial direction has a first surface at an inner edge of the plate, and a second surface radially outward from the first surface. The first and second surfaces are away from the core piece, which is on the one side of the plate in the axial direction, toward the other side. The plate includes through-holes on the second surface and arranged circumferentially at intervals, and a plate wall protruding to one side in the axial direction from a portion of the first surface positioned radially outward from an inner edge.

An integrated power clamp motor system includes a housing with one or more stator stages coupled to the inner surface. Each of the stator stages has a winding and a stator core with a plurality of stator teeth circumferentially distributed about a longitudinal axis, at an inner diameter of the stator core. A rotor is disposed about the longitudinal axis, inside the stator core, with a plurality of magnetic poles circumferentially distributed along an outer surface, adjacent the stator teeth. A power clamp assembly is coupled to the rotor via one or more of a screw assembly, a thrust rod, and a transmission, and operational between first and second positions responsive to rotation of the rotor.