US 11,705,842 B2
Decoupling control system and method for harmonic current of salient pole synchronous motor
Jinsong Kang, Shanghai (CN); Siyuan Mu, Shanghai (CN); Zhixun Ma, Shanghai (CN); Houxiao Jiang, Shanghai (CN); Donghua Wu, Shandong (CN); Fujie Jiang, Shandong (CN); and Xinmai Gao, Shandong (CN)
Assigned to TONJI UNIVERSITY, Shanghai (CN)
Filed by TONGJI UNIVERSITY, Shanghai (CN); and CRRC QINGDAO SIFANG CO., LTD., Shandong (CN)
Filed on Feb. 23, 2021, as Appl. No. 17/183,186.
Claims priority of application No. 202010593436.1 (CN), filed on Jun. 27, 2020.
Prior Publication US 2021/0408952 A1, Dec. 30, 2021
Int. Cl. H02P 21/22 (2016.01); H02P 21/13 (2006.01)
CPC H02P 21/22 (2016.02) [H02P 21/13 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A decoupling control system for a harmonic current of a salient pole synchronous motor, comprising:
a harmonic current detection module (1), configured to detect and acquire 6k±1 harmonic currents and take the same as harmonic current feedback, wherein k is a positive integer;
a linear transformation module (2), configured to perform linear transformation on 6k±1 harmonic current references and the detected 6k±1 harmonic current feedback to acquire new harmonic currents in a harmonic reference frame separately;
a harmonic current decoupling control module (3), configured to adjust an output voltage according to an error between a harmonic current reference subjected to the linear transformation and harmonic current feedback subjected to the linear transformation, and perform independent decoupling control over each of the harmonic currents;
an inversely linear transformation module (4), configured to perform inversely linear transformation on the output voltage of the harmonic current decoupling control module (3) to acquire a control output voltage in the harmonic reference frame; and
a motor control module (6), configured to take the control output voltage as a part of output voltage reference of the inverter for controlling operation of the salient pole synchronous motor.