Torsional vibration damper and torsional vibration damper system

Abstract

A device () for transmitting torque for driving an auxiliary unit, in particular an alternator, preferably in a motor vehicle, and for damping torsional vibrations, said device comprising driving means () that can be driven about an axis of rotation () by an internal combustion engine, and output drive means () rotatable about the axis of rotation () that are arranged and designed for driving the auxiliary unit, wherein at least one axial front face of the driving means () and/or of the output drive means () carries permanent magnet means () which allow torques to be transmitted between the driving means () and the output drive means () and which allow torsional vibrations to be dampened, the poles () of the permanent magnet means () being arranged in at least one radial plane, characterized in that the permanent magnet means () comprise a plurality of permanent magnet elements () arranged next to each other in the circumferential direction, these permanent magnets () adjoining each other, in particular being directly in contact or fixed to each other via an adhesive layer of less than 2 mm thickness, and/or that the permanent magnet means () comprise at least one shaped part made of plastic, in particular an injection-molded part made of plastic and/or a shaped part made of a sintered material, and/or the permanent magnet means () are arranged on a geometrical, preferably concentric annular orbit, which deviates from a concentric circular orbit, preferably an elliptic orbital ().