Drive System Having Harmonics Infeed

A drive system includes an electric machine with a rotor having an externally excited rotor winding, and a stator having stator winding sets, each with at least three stator windings; a control unit controlling the electric machine supply the rotor winding with a first current signal, and the stator windings with different current phases of a multi-phase second current signal, thus producing a rotary magnetic field generating a torque on the rotor; at least one inverter, the multi-phase current signal being provided based on the at least one inverter; and at least one rectifier providing a DC signal, the first current signal being based at least on the DC signal and on an AC harmonics component. Harmonics of a current phase of the multi-phase current signal are reduced based on the supply of the AC harmonics component.