Abstract: The invention relates to an electrical machine (10), and to a method for producing such an electrical machine, especially for adjusting mobile parts in a motor vehicle. Said machine comprises a rotor (20) on which a bipolar electrical winding (25) having a plurality of coils (26) is arranged. Said coils (26) are configured to give two symmetrical coil sections (27) each which are disposed symmetrical to each other relative to the axis of rotation (23) of the rotor (20), both coil sections (27) being simultaneously commutable.

Abstract: A winding support for an electrical machine embodied as a lamination packet and has a plurality of pole teeth each having a pole foot about which a winding can be disposed. Beginning at the face ends of the lamination packet, the pole feet have an increasing width. The result is graduations in the tooth width, and thus the tooth cross section is “rounded” and hence smaller in circumference. The winding wire thus becomes shorter, and as a result the resistance drops.

Abstract: An electric machine including armature equipped with armature slots for accommodating armature coils, a commutator equipped with commutator segments, and a first and second hammer brush that each rest against the commutator in sliding fashion by means of a spring lever, in which at least one armature coil is comprised of two partial coils that are situated symmetrically to each other in relation to the rotation axis of the armature and the partial coils are connected to two adjacent commutator segments of the commutator.

Abstract: An armature for a direct current motor, in particular for a permanent-magnet-excited DC motor, has an armature body, with armature teeth joined in one piece together via a short-circuit ring and offset by equal circumferential angles, each with a tooth neck for receiving an armature winding and with a tooth head that protrudes past the tooth neck in the circumferential direction. For an axial lengthening of the armature body that is simple and economical to produce, one preferably stacked flux-conducting element each, whose profile corresponds to the tooth head profile, is placed on the axially pointing end faces of the tooth heads.

Abstract: An electrical machine having at least four exciter poles in the stator and having a commutator rotor, which has a number of slots pole teeth on its circumference that is greater than the number of exciter poles, and having twice as large a number of commutator laminations, which via at least two carbon brushes serve to supply current to coils which are each wound on one of the pole teeth, and contact bridges each joined together diametrically opposed laminations. When there is an even number of slots, pole teeth and coils, the beginning and end of one coil of the coils disposed on adjacent pole teeth is connected directly to the laminations adjacent to one another, and the beginning and end of the other coil is connected via one of the contact bridges to the laminations adjacent to one another.

Abstract: The invention is based on an electromagnetic actuator, especially for activating a valve, having at least one electromagnet (10) that acts on a correspondingly designed armature surface (20) of a moveable armature (22) in a first effective range (12) by way of at least one first conical and/or stepped pole face (18) using a magnetic field (16) generated by at least one coil (14). It is proposed that the electromagnet (10) act on a corresponding armature surface (28) by way of at least a second pole face (26) in at least a second effective range (24).