US 12,407,279 B2
Motor control device, motor control method, and program
Yasushi Ono, Kyoto (JP); and Kotaro Asaba, Kyoto (JP)
Assigned to OMRON CORPORATION, Kyoto (JP)
Appl. No. 18/546,334
Filed by OMRON Corporation, Kyoto (JP)
PCT Filed Dec. 20, 2021, PCT No. PCT/JP2021/047128
§ 371(c)(1), (2) Date Aug. 14, 2023,
PCT Pub. No. WO2022/190546, PCT Pub. Date Sep. 15, 2022.
Claims priority of application No. 2021-036847 (JP), filed on Mar. 9, 2021.
Prior Publication US 2024/0120858 A1, Apr. 11, 2024
Int. Cl. H02P 5/00 (2016.01); H02P 5/46 (2006.01); H02P 5/74 (2006.01); H02P 21/22 (2016.01)
CPC H02P 5/74 (2013.01) [H02P 21/22 (2016.02)] 11 Claims
OG exemplary drawing
 
1. A motor control device, comprising:
N inverters configured to control N motors connected via power cables based on PWM signals, respectively; and
a phase controller configured to determine phases of N carrier signals to be used for generating PWM signals to be supplied to the N inverters so that a sum of N vectors represented by noise amounts related to the respective N motors becomes zero,
wherein the phase controller arranges the N vectors in descending order of absolute values of magnitudes, and in a case where an absolute value of a magnitude of a maximum vector is smaller than ½ of a total value of the absolute values of the magnitudes of the N vectors, creates a polygon including N sides in which the maximum vector is arranged at a bottom side and remaining vectors are arranged as remaining sides, and determines relative angles between the bottom side and the respective remaining sides as phases of the N carrier signals.