METHOD FOR MODULATING TORQUE RIPPLE AND/OR RADIAL FORCE OF A THREE-PHASE CURRENT OPERATED ELECTRIC MACHINE

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 harmo...

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Bibliographische Detailangaben
Hauptverfasser:	Langheck, Andreas, Stretz, Dominik
Format:	Patent
Sprache:	eng
Schlagworte:	CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	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 (φd,k2φqk) 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 φd,k ≠φq,k applies.