Abstract: The present invention relates to a method and a device for manufacturing a radial centering surface on an outer circumference of an annular laminated core of a stator, the centering surface (19; 35) being created by cutting. The present invention also relates to a stator (1; 109; 140) with centering surfaces (114; 148, 149) created by cutting, and an electrical machine (100) with a stator (109), which includes radial centering surfaces created by cutting.

Abstract: The invention relates to a manufacturing device for the forming under bending conditions of an electromagnetic element of an electrical machine, during which the electromagnetic element is formed from a disc set (5) that has been formed by bending. To this end, a first device (10) for bend-forming the disc set (5), and a second device (25) for completing the forming of the bent disc set (5) are provided. The second device (25) has a first subassembly (29) for axially fixing and pressing the disc set (5) and has a second subassembly (28) for radially centering and pressing the disc set (5).

Abstract: The method of making a two-layer lap winding (12) for a multiphase electrical machine includes the steps of winding a first coil unit (20) of a first phase winding (14) around a winding bar (10); subsequently laying a coil connector (18) of the first phase winding (14) in a first direction and then winding at least one other coil unit (16) of at least one other phase winding (14) around the winding bar (10) and over the coil connector (18). Subsequently a second coil unit (22) of the first phase winding (14) is wound around the winding bar (10) following all first coil units of all phase windings and after all coil connectors from the first coil units are laid. A method of making a stator from the two-layer lap winding (12) is also described.

Abstract: A stator for an electrical machine is proposed that has a stator winding (45) that is held by a stator core (10) that is formed into an annular shape. The stator core (10) has grooves (14) and teeth (13) on its radially inwardly oriented circumference. The stator core (10) is composed of layered stator sheet metal lamellae (11), the direction of the layers defining an axial direction (a). It is provided that at least a first stator sheet metal lamella (20) has a higher flexural strength than second stator sheet metal lamellae (21), the at least one first stator sheet metal lamella (20) having a thickness (dLE) in the axial direction (a) that does not exceed 4 mm.

Abstract: A strip-shaped lamella (10) for a stator (30) of an electric machine, having a yoke region (12) and a number of first teeth (18) that are of one piece with the yoke region (12) on a first side (14) and have first grooves (20) between them, and having second teeth (22) that are of one piece with the yoke region (12) on a second side (16) oriented away from the first side (14) and have second grooves (24) between them. The second teeth (22) are located at a position of the first teeth (18).

Abstract: A strip-shaped lamella (10) for a stator (30) of an electric machine, having a yoke region (12) and a number of first teeth (18) that are of one piece with the yoke region (12) on a first side (14) and have first grooves (20) between them, and having second teeth (22) that are of one piece with the yoke region (12) on a second side (16) oriented away from the first side (14) and have second grooves (24) between them. The second teeth (22) are located at a position of the first teeth (18).

Abstract: The method for making a stator includes making individual strip-shaped laminas (15) for it; stacking the laminas (15) to form a stator core (13) with grooves (18) on one side extending through the core; producing a subassembly by inserting a stator winding (17) into the grooves (18); bending the subassembly to form a cylindrical cavity so that the grooves (18) end in the cavity and connecting two ends (23) of the stator core (13) to each other by a welding seam (20) to maintain this configuration. To produce a welding seam of sufficient strength which does not exert excessive influence on magnetic properties, the welding seam depth (TS) is given by TS=0.5 mm*(Hyoke/mm?1)±?TS, wherein Hyoke is yoke height and ?TS is a tolerance value. An electric machine including the stator made by this method is also described.

Abstract: The present invention proposes a method for manufacturing a stator for an electric machine, in which strip-shaped laminations (21) are first stacked to form an essentially block-shaped lamination packet (40) that is then shaped into an annular form by means of roller bending in one of the subsequent steps; the annular form has an axial direction (a), which corresponds to a cylinder axis (z), and axial end surfaces (46). In another of the subsequent steps, the annular lamination packet (40) is plastically deformed in the axial direction (a) at least in some parts of the axial end surfaces (46). The present invention also proposes a stator for an electric machine, in particular a generator for motor vehicles, which is comprised of a stator yoke that is composed of rolled strip-shaped laminations (21) and has axial end surfaces (46). The stator yoke is plastically deformed in the axial direction (a) on the end surfaces (46).

Abstract: A stator for an electrical machine is proposed that has a stator winding (45) that is held by a stator core (10) that is formed into an annular shape. The stator core (10) has grooves (14) and teeth (13) on its radially inwardly oriented circumference. The stator core (10) is composed of layered stator sheet metal lamellae (11), the direction of the layers defining an axial direction (a). It is provided that at least a first stator sheet metal lamella (20) has a higher flexural strength than second stator sheet metal lamellae (21), the at least one first stator sheet metal lamella (20) having a thickness (dLE) in the axial direction (a) that does not exceed 4 mm.

Abstract: A stator lamination packet for an electrical machine is proposed which comprises individual stacked striplike laminations (10). This stator lamination packet (29) has one side (E) provided with teeth (15) and slots (16), which in at least one slot base (22) has at least one weld seam (24) for fixing the stacked laminations (10).

Abstract: The method of making a two-layer lap winding (12) for a multiphase electrical machine from a wire bundle (33) includes the steps of winding a first coil unit (20) of a first phase winding (14) around a winding bar (14); subsequently laying a coil connector (18) of the first phase winding (14) in a first direction and winding at least one other coil unit (16) of at least one other phase winding (14) over the coil connector (18). A method of making a stator from the two-layer lap winding (12) is also described.

Abstract: A method for producing a magnetically excitable core (24) for an electrical machine, by which in a method step (S1), the core (24), having a substantially parallelepiped shape (20) with slots (32) extending parallel on one side, is furnished, into whose slots (32), in a method step (S2), the core winding (40) is inserted by its winding sides (36), and then in a method step (S3), the core (24) together with the core winding (40) is reshaped into a cylindrical ring shape (52) with radially inward-oriented slots (32), is proposed. The method is characterized by a further step, according to which in each case all winding sides (36) that are inserted into each slot (32) are pressed into a slot shape (119) in a tool (44) and reshaped before being inserted into the slot (32).