An electric motor includes a stator and a rotor. The stator carries a plurality of phase windings. The rotor carries a plurality of magnet poles and is connected to a shaft. The stator includes an outer annular yoke and a plurality of discrete teeth that are separate from the annular yoke. Each tooth has a stem and a tooth tip that is located at the end of the stem closest to the roto. An inner annular sleeve is located in what is otherwise an airgap between the inwardly facing tips of the stator teeth and the rotor. The inner sleeve includes location features that positively locate and support the teeth by the tips.

An electric motor includes a stator and a rotor. The stator carries a plurality of phase windings. The rotor carries a plurality of magnet poles and is connected to a shaft. The stator includes an outer annular yoke and a plurality of discrete teeth that are separate from the annular yoke. Each tooth has a stem and a tooth tip that is located at the end of the stem closest to the roto. An inner annular sleeve is located in what is otherwise an airgap between the inwardly facing tips of the stator teeth and the rotor. The inner sleeve includes location features that positively locate and support the teeth by the tips.

The invention relates to a method for producing a component (10) of an electric machine, wherein at least one permanent magnet means (1) of the component (10) is arranged on or at the component (10), together with at least one mechanical restraining means (2) for spatially fixing the at least one permanent magnet means (1), and the at least one mechanical restraining means (2) consists of a composite material or contains same, characterised in that, at least during a thermal treatment of the component (10), a means (3, F) is used for the targeted control of the magnetic field of the permanent magnet means (1).

The invention relates to a method for producing a component (10) of an electric machine, wherein at least one permanent magnet means (1) of the component (10) is arranged on or at the component (10), together with at least one mechanical restraining means (2) for spatially fixing the at least one permanent magnet means (1), and the at least one mechanical restraining means (2) consists of a composite material or contains same, characterised in that, at least during a thermal treatment of the component (10), a means (3, F) is used for the targeted control of the magnetic field of the permanent magnet means (1).

A stator for an electric machine and a production method for a stator are disclosed. The stator includes an annular stator body defining a longitudinal centre axis, the annular stator body having an outer circumference lateral surface that comprises longitudinal ribs projecting away radially to the outside and longitudinal cooling channels delimited by the longitudinal ribs which can be flowed through by cooling fluid. An annular outer housing sleeve axially arranged over the stator body. The stator body with the longitudinal ribs is non-rotatably fixed to the outer housing sleeve from radially inside in a frictionally locking manner.

A stator for an electric machine and a production method for a stator are disclosed. The stator includes an annular stator body defining a longitudinal centre axis, the annular stator body having an outer circumference lateral surface that comprises longitudinal ribs projecting away radially to the outside and longitudinal cooling channels delimited by the longitudinal ribs which can be flowed through by cooling fluid. An annular outer housing sleeve axially arranged over the stator body. The stator body with the longitudinal ribs is non-rotatably fixed to the outer housing sleeve from radially inside in a frictionally locking manner.

A rotor includes a columnar rotor core extending in the axial direction, a rotor cover covering a radially outer side of the rotor core, and a resin portion covering a one-side end surface in the axial direction of the rotor core. The rotor cover includes a protruding portion protruding to one side in the axial direction with respect to the one-side end surface in the axial direction of the rotor core. The resin portion includes, on the radially outer side, an edge portion that protrudes to one side in the axial direction and is in contact with the radially inner side of the protruding portion.

A rotor includes a columnar rotor core extending in the axial direction, a rotor cover covering a radially outer side of the rotor core, and a resin portion covering a one-side end surface in the axial direction of the rotor core. The rotor cover includes a protruding portion protruding to one side in the axial direction with respect to the one-side end surface in the axial direction of the rotor core. The resin portion includes, on the radially outer side, an edge portion that protrudes to one side in the axial direction and is in contact with the radially inner side of the protruding portion.

A manufacturing method of a laminated iron core includes: a step of pressing, with a die (2), an electrical steel sheet having a coating containing an adhesive that exhibits adhesive ability through heating, provided to a sheet surface thereof, to obtain a unit iron core (1); and a step of laminating the unit iron cores (1) pressed with the die (2), and heating the sheet surface of the unit iron core (1) of an uppermost layer at a plurality of partial regions to make the unit iron core (1) of the uppermost layer to be partially adhered to the unit iron core (1) of a lower layer thereof at a plurality of regions. As above, by performing the presswork and the lamination substantially simultaneously as a series of operation, it is possible to increase the efficiency of manufacture of the laminated iron core without increasing the man-hour.

A manufacturing method of a laminated iron core includes: a step of pressing, with a die (2), an electrical steel sheet having a coating containing an adhesive that exhibits adhesive ability through heating, provided to a sheet surface thereof, to obtain a unit iron core (1); and a step of laminating the unit iron cores (1) pressed with the die (2), and heating the sheet surface of the unit iron core (1) of an uppermost layer at a plurality of partial regions to make the unit iron core (1) of the uppermost layer to be partially adhered to the unit iron core (1) of a lower layer thereof at a plurality of regions. As above, by performing the presswork and the lamination substantially simultaneously as a series of operation, it is possible to increase the efficiency of manufacture of the laminated iron core without increasing the man-hour.