US 12,143,040 B2
Drive system having harmonics infeed
Said El-Barbari, Freising (DE); Daniel Glose, Munich (DE); and Jovan Knezevic, Munich (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 18/003,762
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed May 27, 2021, PCT No. PCT/EP2021/064160
§ 371(c)(1), (2) Date Dec. 29, 2022,
PCT Pub. No. WO2022/002491, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 10 2020 117 149.8 (DE), filed on Jun. 30, 2020.
Prior Publication US 2023/0261599 A1, Aug. 17, 2023
Int. Cl. H02K 3/28 (2006.01); H02P 21/00 (2016.01); H02P 25/022 (2016.01); H02P 25/22 (2006.01); H02P 27/06 (2006.01)
CPC H02P 25/022 (2013.01) [H02P 21/50 (2016.02); H02P 25/22 (2013.01); H02P 27/06 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A drive system comprising:
an electric machine set up as a synchronous machine, the electric machine including: a rotor rotatable about an axis of rotation, the rotor having at least one externally excited rotor winding, and at least one stator having at least two stator winding sets, each stator winding set having at least three stator windings;
a control unit configured to control the electric machine such that: the at least one rotor winding is supplied with a first current signal during operation, and the stator windings are supplied at least partly with different current phases of a multi-phase second current signal during operation, wherein, as a result, a rotary magnetic field for generating a torque acting on the rotor is produced;
at least one inverter, wherein the multi-phase current signal is provided based on the at least one inverter; and
at least one rectifier providing a DC signal, wherein the first current signal is based at least on the DC signal and on an AC harmonics component, and
wherein harmonics of at least one current phase of the multi-phase current signal, which are caused by a magnetic coupling occurring between the at least one rotor winding and the stator windings during operation, are reduced based on the supply of the at least one AC harmonics component to the at least one rotor winding.