The invention relates to a stator (ST) for an electric machine (EM) of an at least partially electrically driven motor vehicle (KFZ), comprising

an annular yoke (JO) with an inner side (IS) oriented inward in the radial direction, and a stator tooth (SZ), which is positively connected to the yoke (JO) and has a tooth shank (ZS) and a tooth head (ZK) adjoining the tooth shank (ZS), characterized in that a connecting projection (VV) oriented inward in the radial direction is formed on the inner side (IS) of the yoke (JO), and a connecting recess (VA) is formed on an end face (SS) of the tooth shank (ZS) that is formed on a side facing away from the tooth head (ZK), and, to obtain the positive connection, the connecting projection (VV) engages at least partially and/or in some portion or portions in the connecting recess (VA).

A method for packaging sheet metal parts made from an electrical steel strip or sheet to form a laminated core is disclosed. In order to achieve advantageous process conditions, it is proposed that when the hot-melt adhesive varnish layers are pressurized in the axial direction of the stacked sheet metal parts, they are pressurized multiple times by means of a pressure pulse in that the pressure pulse is exerted through either an impingement with pulse pressure or a relief of pulse pressure.

A method for packaging sheet metal parts made from an electrical steel strip or sheet to form a laminated core is disclosed. In order to achieve advantageous process conditions, it is proposed that when the hot-melt adhesive varnish layers are pressurized in the axial direction of the stacked sheet metal parts, they are pressurized multiple times by means of a pressure pulse in that the pressure pulse is exerted through either an impingement with pulse pressure or a relief of pulse pressure.

In an electric motor with a rotor, e.g., a rotatably mounted rotor, the rotor has a rotor shaft which protrudes through a recess of a laminated core, the laminated core has a hollow configuration, the recess of the laminated core has a non-round configuration, and the rotor shaft has a circular cylindrical lateral surface in the region covered by the laminated core in the axial direction. A radially protruding shaft collar is molded onto the rotor shaft, the laminated core is positioned against the shaft collar, an annular cavity is arranged in the shaft collar, e.g., is introduced into the shaft collar, a radial bore which passes through the shaft collar opens into the cavity, and adhesive is arranged between the laminated core and the rotor shaft and the annular cavity is at least partly filled with adhesive.

In an electric motor with a rotor, e.g., a rotatably mounted rotor, the rotor has a rotor shaft which protrudes through a recess of a laminated core, the laminated core has a hollow configuration, the recess of the laminated core has a non-round configuration, and the rotor shaft has a circular cylindrical lateral surface in the region covered by the laminated core in the axial direction. A radially protruding shaft collar is molded onto the rotor shaft, the laminated core is positioned against the shaft collar, an annular cavity is arranged in the shaft collar, e.g., is introduced into the shaft collar, a radial bore which passes through the shaft collar opens into the cavity, and adhesive is arranged between the laminated core and the rotor shaft and the annular cavity is at least partly filled with adhesive.

A method for manufacturing a rotor of a hollow shaft motor according to the present invention includes: a step of manufacturing a rotor core; and a step of placing the rotor core in a die-casting mold to mold a hollow shaft housing, wherein the step of manufacturing the rotor core includes: a plurality of piercing processes for molding a shape of a laminar member in an electrical steel plate; a blanking process for separating the laminar member from the electrical steel plate; a stacking process for stacking a plurality of laminar members to manufacture a rotor core; an ejecting process for ejecting the stacked rotor core to the outside; and a magnet inserting process for inserting a magnet into the rotor core.

A method for manufacturing a rotor of a hollow shaft motor according to the present invention includes: a step of manufacturing a rotor core; and a step of placing the rotor core in a die-casting mold to mold a hollow shaft housing, wherein the step of manufacturing the rotor core includes: a plurality of piercing processes for molding a shape of a laminar member in an electrical steel plate; a blanking process for separating the laminar member from the electrical steel plate; a stacking process for stacking a plurality of laminar members to manufacture a rotor core; an ejecting process for ejecting the stacked rotor core to the outside; and a magnet inserting process for inserting a magnet into the rotor core.

An electric machine includes a stator having a plurality of windings and a rotor positioned within the stator. The rotor includes a lamination stack formed from a plurality of lamination sheets with a plurality of slots formed in the lamination stack. The rotor further includes a plurality of magnets arranged in the plurality of slots. At least one of the plurality of lamination sheets includes a tab extending into an associated one of the plurality of slots, the tab including a bent distal tip defining a distal curved surface and a bent proximal joint defining a proximal curved surface, wherein the distal curved surface engages one of the plurality of magnets positioned in the associated one of the plurality of slots.

An electric machine includes a stator having a plurality of windings and a rotor positioned within the stator. The rotor includes a lamination stack formed from a plurality of lamination sheets with a plurality of slots formed in the lamination stack. The rotor further includes a plurality of magnets arranged in the plurality of slots. At least one of the plurality of lamination sheets includes a tab extending into an associated one of the plurality of slots, the tab including a bent distal tip defining a distal curved surface and a bent proximal joint defining a proximal curved surface, wherein the distal curved surface engages one of the plurality of magnets positioned in the associated one of the plurality of slots.

The disclosure relates in general to a method and a system for producing a stator for an electric machine. The stator has a laminated core with individual adjacently arranged steel sheets along an axial direction of the stator. At least some portion of the steel sheets has an electric insulating material. The steel sheets of a laminated core of a stator are stamped out of a raw material. The steel sheets are stacked along the axial direction of the stator to form the laminated core. The steel sheets of the laminated core are clamped along the axial direction of the stator. The clamped laminated core is accommodated in a receptacle. Cut edges of the clamped laminated core accommodated in the receptacle are heated by a heating device in such a way that eddy currents are induced in at least one external portion of the laminated core.