US 11,955,910 B2
Method and device for regulating an electric machine
Maximilian Manderla, Ludwigsburg (DE); Michele Hirsch, Esslingen (DE); Sebastian Paulus, Esslingen Am Neckar (DE); Timo Kuehn, Oetigheim (DE); Wei-Lung Lee, Bietigheim-Bissingen (DE); and Florian Malchow, Bangalore (IN)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 17/781,122
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Oct. 21, 2020, PCT No. PCT/EP2020/079591
§ 371(c)(1), (2) Date May 31, 2022,
PCT Pub. No. WO2021/104761, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 10 2019 218 543.6 (DE), filed on Nov. 29, 2019.
Prior Publication US 2022/0407441 A1, Dec. 22, 2022
Int. Cl. H02P 21/05 (2006.01); H02P 21/22 (2016.01)
CPC H02P 21/05 (2013.01) [H02P 21/22 (2016.02)] 14 Claims
OG exemplary drawing
 
1. A method (400) for controlling an electric machine (190) having a harmonic filter (150), the harmonic filter (150) comprising a second filter (142) and a filter output transformer (132), the method comprising the steps of:
ascertaining (410) a feedback variable (Idq), the feedback variable comprising an actual variable of a fundamental and of a harmonic of a specified frequency in a field-oriented system;
determining (414) a filter specification variable (FV) in a harmonic-oriented system;
filtering (415) the filter specification variable (FV) by means of the second filter (142);
back-transforming (416) the filtered filter specification variable (FV) by means of the filter output transformer (132) to form a harmonic variable (IdqHrmc) in the field-oriented system;
ascertaining (417) a filtered feedback variable without a harmonic component (IdqFunda) as the difference between the feedback variable (Idq) and the harmonic variable (IdqHrmc); and
energizing (480) at least one winding of the electric machine (190) as a function of the filtered feedback variable without a harmonic component (IdqFunda).