A rotor (30) for a rotary electric machine, comprising:-at least one permanent magnet (1),-a rotor mass (33) comprising laminations stacked on top of one another, comprising at least one housing (4) accommodating the permanent magnet (1), the housing (4) being delimited by at least one large face (5a) facing a long side (2a) of the permanent magnet (1), at least one lamination (6) comprising at least two cutouts (10) between them creating at least one tab (12) meeting said large face (5a) of the housing (4) and extending into the housing (4), notably in the direction of the air gap, the lamination (6) comprising one or more punches (15) formed in the tab or tabs (12) and enabling the permanent magnet (1) to be held against an opposite face (6b) of the housing (4).

A method of manufacturing a rotor of an axial flux permanent magnet machine, the machine having a stator comprising a set of coils wound on respective stator bars and disposed circumferentially at intervals about an axis of the machine, and a rotor comprising a rotor body bearing a set of permanent magnets on a layer of metal laminate and mounted for rotation about the axis, and wherein the rotor and stator are spaced apart along the axis to define a gap therebetween in which magnetic flux in the machine is generally in an axial direction, the method comprising: brazing the metal laminate to the rotor body; and joining the set of permanent magnets to the metal laminate.

A method of manufacturing a rotor of an axial flux permanent magnet machine, the machine having a stator comprising a set of coils wound on respective stator bars and disposed circumferentially at intervals about an axis of the machine, and a rotor comprising a rotor body bearing a set of permanent magnets on a layer of metal laminate and mounted for rotation about the axis, and wherein the rotor and stator are spaced apart along the axis to define a gap therebetween in which magnetic flux in the machine is generally in an axial direction, the method comprising: brazing the metal laminate to the rotor body; and joining the set of permanent magnets to the metal laminate.

A rotor includes a columnar rotor core extending in the axial direction, and a rotor cover covering a radially outer side of the rotor core. The rotor cover includes a protruding portion protruding to one side in the axial direction with respect to a one-side end surface in the axial direction of the rotor core, and a flange portion extending radially outward at a one-side end portion in the axial direction of the protruding portion.

A rotor includes a columnar rotor core extending in the axial direction, and a rotor cover covering a radially outer side of the rotor core. The rotor cover includes a protruding portion protruding to one side in the axial direction with respect to a one-side end surface in the axial direction of the rotor core, and a flange portion extending radially outward at a one-side end portion in the axial direction of the protruding portion.

An example motor rotor includes a shaft assembly, and a holding tube surrounding the shaft assembly. The shaft assembly includes a magnet, and a large-diameter portion located near the magnet in an extending direction of the shaft assembly. The large-diameter portion has an outer diameter larger than an outer diameter of the magnet. The holding tube includes an inner circumferential surface that abuts on an outer circumferential surface of the magnet and abuts on an outer circumferential surface of the large-diameter portion.

An example motor rotor includes a shaft assembly, and a holding tube surrounding the shaft assembly. The shaft assembly includes a magnet, and a large-diameter portion located near the magnet in an extending direction of the shaft assembly. The large-diameter portion has an outer diameter larger than an outer diameter of the magnet. The holding tube includes an inner circumferential surface that abuts on an outer circumferential surface of the magnet and abuts on an outer circumferential surface of the large-diameter portion.

A method for manufacturing a rotor assembly of an electric engine, comprising: loading a first and second plurality of magnets in a magnet insertion tool, loading a sleeve in the magnet insertion tool, performing a first insertion movement using the magnet insertion tool, wherein the first insertion movement comprises moving one of the first plurality of magnets or the second plurality of magnets in a radial direction of the sleeve, and performing a second insertion movement using the magnet insertion tool, wherein the second insertion movement comprises moving one of the first plurality of magnets or the second plurality of magnets with respect to the sleeve in an axial direction of the sleeve. The radius of the sleeve is expanded in a radial direction during one of the first insertion movement or the second insertion movement.

A method for manufacturing a rotor assembly of an electric engine, comprising: loading a first and second plurality of magnets in a magnet insertion tool, loading a sleeve in the magnet insertion tool, performing a first insertion movement using the magnet insertion tool, wherein the first insertion movement comprises moving one of the first plurality of magnets or the second plurality of magnets in a radial direction of the sleeve, and performing a second insertion movement using the magnet insertion tool, wherein the second insertion movement comprises moving one of the first plurality of magnets or the second plurality of magnets with respect to the sleeve in an axial direction of the sleeve. The radius of the sleeve is expanded in a radial direction during one of the first insertion movement or the second insertion movement.

A motor includes a rotor having a shaft and a rotor magnet, and a stator. The rotor magnet includes a first magnet magnetized so as to have polar-anisotropic orientation, and second magnets, the number of which is P (P is an even number), provided on an outer circumference of the first magnet, magnetized so as to have polar-anisotropic orientation, and having a stronger magnetic pole than the first magnet. A length Hr of the rotor magnet in the axial direction and a length Hs of a stator core in the axial direction satisfy Hr>Hs. The rotor magnet includes, in the axial direction, a stator-facing portion facing the stator core in the radial direction and an overhang portion protruding from the stator core in the axial direction. A volume ratio of the second magnets to the first magnet is smaller in the overhang portion than in the stator-facing portion.