US 12,308,779 B2
Torque ripple compensation in a motor control system
Akm Arafat, Blaine, MN (US); Bradford K. O. Palmer, Ham Lake, MN (US); S. Dakshina Murthy-Bellur, Plymouth, MN (US); and Minyu Cai, Roseville, MN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Appl. No. 17/916,390
Filed by Cummins Inc., Columbus, IN (US)
PCT Filed Apr. 1, 2020, PCT No. PCT/US2020/026105
§ 371(c)(1), (2) Date Sep. 30, 2022,
PCT Pub. No. WO2021/201856, PCT Pub. Date Oct. 7, 2021.
Prior Publication US 2023/0145167 A1, May 11, 2023
Int. Cl. H02P 6/10 (2006.01); H02P 29/50 (2016.01)
CPC H02P 6/10 (2013.01) [H02P 29/50 (2016.02)] 16 Claims
OG exemplary drawing
 
1. A method for operating a motor control system for a motor having multiple sets of windings, comprising:
receiving an input command;
receiving drive feedback signals representative of drive currents in a motor;
identifying harmonics in the drive feedback signals representative of motor torque ripple;
producing torque ripple compensation signals based on the identified harmonics; and
producing motor drive control signals based on the input command, the current feedback signals and the torque ripple compensation signals, including:
producing a set of motor drive signals for each of the multiple sets of windings; and
controlling phase shift between carrier signals for the multiple sets of windings based on a number of the sets of windings and an order of a dominant high frequency torque ripple depending on a type of carrier signal.