Abstract: The present invention relates to an interference suppression filter for a DC motor (2), comprising two inductors (11, 12) each arranged in a supply line (31, 32) and a Cx capacitor (13) arranged between the supply lines (31, 32) as well as a Cy capacitor (14) arranged between one of the two supply lines (31, 32) and earth (M), wherein the impedances of the inductors (11, 12), of the Cx capacitor (13) and/or of the Cy capacitor (14) are dimensioned in such a manner that a high-frequency interference current which flows in the other of the two supply lines flows away via the Cx capacitor (13) and the Cy capacitor (14). The present invention also relates to a DC motor having the interference suppression filter.

Abstract: An interference suppressor for suppressing high-frequency interference emissions of a direct current motor that is drivable in a plurality of stages and/or directions, comprising a plurality of capacitors located on a first side of a printed circuit board, a plurality of first conductor tracks located on the first side of the printed circuit board for putting the capacitors into contact with a ground terminal, a first terminal and at least one further terminal provided for individual stages of the direct current motor, and put into contact with a first connection line for a first stage and at least one second connection line for at least one second stage of the direct current motor, a ground face located on a second side, diametrically opposite the first side of the printed circuit board, with the first connection line and the at least one second connection line fed through in insulated fashion relative to the ground face wherein the ground face is electrically connected via through-plated holes embodied as v

Abstract: A commutator for an electrical machine, in particular for an electric motor for actuating drives in motor vehicles, has a commutator body that supports commutator laminations. To reduce the electromagnetic radiation, emitted into the environment as interfering radiation, that is engendered by spark development in the commutation operation, the commutator body is embodied as a hollow cylinder, and the commutator laminations are disposed on the inner jacket face of the commutator body.

Abstract: An interference suppressor (10) for suppressing high-frequency interference emissions of a direct current motor (26) that is drivable in a plurality of stages and/or directions is proposed, having a plurality of capacitors (16) located on a first side (12) of a printed circuit board (14) and having a plurality of first conductor tracks (18), located on the first side (12) of the printed circuit board (14), for putting the various capacitors (16) into contact with a ground terminal (20), and having a first terminal (22) and at least one further terminal (24) for the individual stages of the direct current motor (26), the first terminal (22) and the at least one further terminal (24) being put into contact with a first connection line (48) for the first stage and at least one further connection line (50) for the at least one further stage of the direct current motor (26).

Abstract: A device is proposed for suppressing radio interference in an electrical commutator machine, in particular a DC motor (10), having a rotor (12) supplied via brushes (14a, b) and having an interference suppression circuit (16) that has at least one capacitor and further components. The device of the invention is distinguished in that the interference suppression circuit (16) on the one hand has an interference suppression ring comprising individual interference suppression elements (56), which contain at least one varistor (28and/or at least one capacitor (30) and cooperate with at least one further outer interference suppression capacitor. The individual interference suppression elements (56) of the interference suppression ring (24) are either located between adjacent laminations (32) of the commutator (34) or are connected by one terminal to one lamination (34) and by the respective second terminal to one another to form a virtual zero point 33).

Abstract: A DC-DC converter having a transformer, a reactance coil and a controllable switch for turning a DC supply voltage on and off. The contact gap of a switching transistor is set at a reference potential at a connecting tap between a primary winding and a secondary winding of the reactance coil, which is connected like a transformer with a certain transformation ratio. The anode-cathode segment of a diode and an output capacitor are set at reference potentials in series with the secondary winding of the reactance coil, with the output voltage for a load being applied across the output capacitor. The DC supply voltage is supplied to the primary winding of the reactance coil over an inductance arrangement, and a capacitance arrangement is arranged in parallel with the contact gap of the switching transistor so that a series resonant circuit, which is operative in the turn-on and turn-off phases of the switching transistor, is provided by the inductance arrangement and the capacitance arrangement.

Abstract: A network interface is designed for two-wire reception via a serial bus and has a differential receiver which is connected to input lines. The network interface likewise has an element for recognizing error states on the bus lines. It is designed such that it changes into single-wire operation after recognizing the error state, in order to maintain the data traffic. In this case, one input line is connected to a fixed terminal potential. The terminal potential is in this case selected such that the magnitude of the potential difference between the two input lines is the same for both bit levels.