Abstract: A method for modulating a torque ripple and/or the a radial force of a three-phase current-operated electric machine includes selecting at least one of a harmonic (HM1_EM) in a torque of the electric machine and a harmonic (HM_X) of a load coupled to the electric machine. The at least one selected harmonic (HM1_EM, HM_X) is modulated by applying the at least one selected harmonic (HM1_EM, HM_X) to a d-current and/or a q-current or to a variable correlated therewith in order to generate a setpoint variable for driving the electric machine. A phase angle (?d,k, ?q,k) of the at least one of a harmonic (HId) in the d-current and a harmonic (HIq) in the q-current is at least temporarily set to be different with respect to a rotor angle, such that ?d,k??q,k applies.

Abstract: A method for modulating a torque ripple and/or a radial force of a three-phase current-operated electric machine includes selecting at least one of a harmonic (HM1_EM) in a torque of the electric machine and a harmonic (HM_X) of a load coupled to the electric machine. The at least one selected harmonic (HM1_EM, HM_X) is modulated by applying the at least one selected harmonic (HM1_EM, HM_X) to a d-current and/or a q-current or to a variable correlated therewith in order to generate a setpoint variable for driving the electric machine A phase angle (?d,k2?qk) of at least one of a harmonic (HId) in the d-current and harmonic (H1q) in the q-current is at least temporarily set to be different with respect to a rotor angle,such that ?d,k ??q,k applies.