A core having an annular core-back portion and a plurality of tooth portions formed, at intervals in a circumferential direction, on an inner circumferential surface of the core-back portion to protrude, a coil wound around each tooth portion with an insulator therebetween, and a mold resin portion coating the core and the coil, are included. The core-back portion is formed to be discontinuous at at least one position in the circumferential direction. The insulator has, at two or more positions in the circumferential direction, protrusions protruding to an outer side in a radial direction beyond an outer circumferential surface of the core-back portion. The mold resin portion does not coat a protrusion surface, along an axial direction, on the outer side in the radial direction of each protrusion.

An axial gap motor has a stator main body part arranged at a center thereof in an axial direction of a rotating shaft, and first and second rotor main body parts arranged respectively on first and second sides of the stator main body part in the axial direction so as to both face the stator main body part. A method of manufacturing the axial gap motor includes an assembly step of moving a central member including the stator main body part, a first member including the first rotor main body part and a second member including the second rotor main body part relative to each other so as to cause the first and second rotor main body parts to simultaneously approach or alternately gradually approach the stator main body part.

An axial gap motor has a stator main body part arranged at a center thereof in an axial direction of a rotating shaft, and first and second rotor main body parts arranged respectively on first and second sides of the stator main body part in the axial direction so as to both face the stator main body part. A method of manufacturing the axial gap motor includes an assembly step of moving a central member including the stator main body part, a first member including the first rotor main body part and a second member including the second rotor main body part relative to each other so as to cause the first and second rotor main body parts to simultaneously approach or alternately gradually approach the stator main body part.

A motor includes: a housing that includes an inner circumferential surface having a cylindrical shape; and a stator that includes an outer circumferential surface that abuts on the inner circumferential surface from an inner side in a radial direction. The stator includes grooves on the outer circumferential surface, the grooves each extending along an axial direction and being arrayed along a circumferential direction. The housing includes at least one protrusion on the inner circumferential surface, the protrusion abutting on an inner surface of one of the grooves. The grooves include at least one first groove on which the protrusion abuts and a second groove on which the protrusion does not abut.

A motor includes: a housing that includes an inner circumferential surface having a cylindrical shape; and a stator that includes an outer circumferential surface that abuts on the inner circumferential surface from an inner side in a radial direction. The stator includes grooves on the outer circumferential surface, the grooves each extending along an axial direction and being arrayed along a circumferential direction. The housing includes at least one protrusion on the inner circumferential surface, the protrusion abutting on an inner surface of one of the grooves. The grooves include at least one first groove on which the protrusion abuts and a second groove on which the protrusion does not abut.

An electric machine, in particular an electric motor, having an encapsulated magnetic air gap and the yoke ring of the stator being wound instead of the pole shoes. A method for manufacturing the electric machine is also provided.

An electric machine, in particular an electric motor, having an encapsulated magnetic air gap and the yoke ring of the stator being wound instead of the pole shoes. A method for manufacturing the electric machine is also provided.

The present invention relates to an electric device for mounting on a rotatable shaft comprising at least two rotor sections being configured to be combined coaxially around the shaft and being mechanically coupled to the shaft so as to constitute a rotor and at least two stator sections with housing, thus being configured to be combined in a coaxial stator configuration around said rotor. The device includes a coupling being fastened in a coaxial configuration to the shaft, the coupling including a flange section extending outward from the shaft, the flange and rotor including matching locking sections so as to connect the rotor to the flange and therefore to the shaft. FIG. 1

The present invention relates to an electric device for mounting on a rotatable shaft comprising at least two rotor sections being configured to be combined coaxially around the shaft and being mechanically coupled to the shaft so as to constitute a rotor and at least two stator sections with housing, thus being configured to be combined in a coaxial stator configuration around said rotor. The device includes a coupling being fastened in a coaxial configuration to the shaft, the coupling including a flange section extending outward from the shaft, the flange and rotor including matching locking sections so as to connect the rotor to the flange and therefore to the shaft. FIG. 1

A star disc, for a rotor of an electric machine, comprising a plurality of pole arms configured to wind a wire around a winding; a switching ring having protruding contacts, the switching ring being held in a rotationally fixed manner in a recess of the star disc; and an external plastic overmolding structured to hold the switching ring to the star disc in an axially form-fitting manner.