Abstract: A method for producing a cast/sheet-metal composite body, comprising the following steps: provide a casting mold (12), place at least one sheet-metal part (11) in the casting mold (12), produce a cast part (2) interconnected with the at least one sheet-metal part (11), and apply pressure to the at least one sheet-metal part (11) to form a hollow space (8).

Abstract: An alternator for motor vehicles has a stator and a claw-pole rotor that co-operates with the latter. The claw-poles of the rotor have claw-pole fingers which are uniformly distributed around the periphery, axially intermesh in alternate directions at a distance from one another and have a pole core and an excitation winding. Permanent magnets are arranged between the claw-pole fingers and are held in a retaining ring with a zigzag configuration. To mount the retaining ring in as simple a manner as possible between the claw-pole fingers, a longitudinal slit is provided on each longitudinal side of the claw-pole finger. The retaining ring engaged in said slit by one respective longitudinal side or its axial section.

Abstract: The invention relates to an electric machine, in particular an alternator for motor vehicles, comprising a stator and a claw-pole rotor (15) that co-operates with the latter. The claw-poles of the rotor have claw-pole fingers (34) which are uniformly distributed around the periphery, axially intermesh in alternate directions at a distance from one another and comprise a pole core and an excitation winding. Permanent magnets are arranged between the claw-pole fingers (34) and are held in a retaining ring (42) with a zigzag configuration. To mount the retaining ring (42) in as simple a manner as possible between the claw-pole fingers (34), a longitudinal slit (38) is provided on each longitudinal side (37) of the claw-pole fingers (34). The retaining ring (42) engages in said slit by means of one respective longitudinal side of its axial sections (43).

Abstract: A method for producing a cast/sheet-metal composite body, comprising the following steps: provide a casting mold (12), place at least one sheet-metal part (11) in the casting mold (12), produce a cast part (2) interconnected with the at least one sheet-metal part (11), and apply pressure to the at least one sheet-metal part (11) to form a hollow space (8).

Abstract: An electrical machine is proposed, preferably a rotary current generator (10), with a rectifier component (26) at the rear end area of its end shield (11), in which dissipation of waste heat is to be improved. Positive and negative heat sinks (27, 28) with the positive and negative diodes (31, 32), respectively, are screwed to the end shield (12) so as to be sandwiched together with a printed circuit board (30) for the connection between diodes and winding connections (17a) with the inclusion of an insulating plate (29). The upper heat sink (27) has a plurality of cooling air openings (38) arranged next to one another at the inner circumferential area for a cooling air flow generated by the fan of the machine. In order to improve the dissipation of heat, axial cooling fins (39) are formed on at least at some of the cooling air openings (38) of the upper heat sink (27).

Abstract: The rectifier device has a metallic front cooling plate and a rear cooling plate spaced from each other and extending parallel to each other; positive diodes arranged on one cooling plate and negative diodes arranged on the other cooling plate; a printed circuit board made of insulating material fastened between the cooling plates and having conductors for connecting the diodes with each other and also with a three-phrase generator; electrical connection device for making electrical connection with the front cooling plate comprising a threaded bolt having a flange, an annular shoulder and an axial pin projecting into an opening of the rear cooling plate, the threaded bolt being pressed in a hole in the front cooling plate and the flange and shoulder being dimensioned so that the annular shoulder contacts on a rear side of the front cooling plate, and a nut screwed on the threaded bolt from a front side of the front cooling plate to secure the threaded bolt in the hole; and an insulating material bush received

Abstract: An electrical machine, preferably a three-phase alternator for vehicles, has a surface-cooled stator which has two stator plate stacks arranged one after the other in the axial direction with two stator windings inserted in the latter. The winding ends of the stator windings, which windings ends project out at the front side, and the two stator plate stacks are enclosed by a metal housing and fitted into the latter so as to conduct heat. For manufacturing the stator in a simple and compact manner accompanied by good heat conduction the stator plate stacks be be embedded in a heat conducting plastic together with spacing means and connection parts contacting the connection conductors of the stator windings in a compression mold with a base part supporting the connection parts so as to form a constructional unit.

Abstract: The electric machine, preferably a three-phase generator (10) for vehicles with a liquid-cooled, pot-shaped metal housing (20) includes two three-phase systems arranged in the house and situated one after the other in the axial direction, a drive shaft (13) received in the base of the metal housing on one end and in a bearing cover (18) on the drive end. For a compact connection of the two three-phase systems and exciter systems with rectifier units and regulators the electrical connections of the three-phase and exciter windings (31, 32; 14, 15) are received in the bearing cover (18) so that they are electrically connected with positive and negative diodes (44, 45) of the rectifier units arranged externally on the bearing cover (18) and with the regulators and connection terminals (22) of the machine via printed circuit boards (65, 80).

Abstract: An electrical machine has a surface-cooled stator having two stator plate stacks provided with slots and two stator windings arranged one after the other in an axial direction and inserted in the slots of the stator plate stack, a drive shaft, two pole systems cooperating with the stator windings, a metal housing arranged so that winding ends of the stator windings project outwardly beyond the metal housing and the two plate stacks are enclosed by the metal housing and fitted in the latter so as to conduct heat. The two stator plate stacks are offset relative to one another by half a slot spacing and, together with the winding ends of the stator windings are embedded in heat conducting plastic to form a prefabricated construction unit.