US 11,863,114 B2
Harmonic direct torque control of an electric machine
Nuno Miguel Amaral Freire, Brande (DK); and Zhan-Yuan Wu, Sheffield (GB)
Assigned to SIEMENS GAMESA RENEWABLE ENERGY A/S, Brande (DK)
Appl. No. 17/606,466
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Apr. 17, 2020, PCT No. PCT/EP2020/060832
§ 371(c)(1), (2) Date Oct. 26, 2021,
PCT Pub. No. WO2020/224932, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. 19172845 (EP), filed on May 6, 2019.
Prior Publication US 2022/0200495 A1, Jun. 23, 2022
Int. Cl. H02P 9/10 (2006.01); H02P 9/02 (2006.01)
CPC H02P 9/10 (2013.01) [H02P 9/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of generating a converter control signal for a generator side converter portion being coupled to a generator, the method comprising:
deriving at least one harmonic torque reference based on a harmonic torque demand and a torque indicating feedback signal;
deriving at least one harmonic flux reference based on a harmonic stator voltage demand and a stator voltage indicating feedback signal;
adding all of the at least one harmonic torque reference to a fundamental torque reference and subtracting an estimated generator torque to derive a torque error;
adding all of the at least one harmonic flux reference to a fundamental flux reference and subtracting an estimated generator flux to derive a flux error; and
deriving the converter control signal based on the torque error and the flux error.