|Table of Contents|

 Tuning method for digital PI controllers of PMSMclosed-loop driving system(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2018年04
Page:
26-32
Research Field:
Publishing date:

Info

Title:
 Tuning method for digital PI controllers of PMSMclosed-loop driving system
Author(s):
  LIU Jing-lin GONG Chao HAN Ze-xiu WANG Xiao-mei
 ( School of Automation,Northwestern Polytechnical University,Xi’an 710129,China)
Keywords:
permanent magnet synchronous motor ( PMSM) PI controller parameter discretization cur-rent loop speed loop
PACS:
TM341
DOI:
10.15938/j.emc.2018.04.004
Abstract:
 In order to obtain a simple and accurate design method of digital PI controller parameter forpermanent magnet synchronous motor,the method of tuning PI parameters in continuous domain is im-proved. A discrete design method of tuning parameter in the w’domain was employed. The phase lagcaused by the sampling time and the zero-order holder ( ZOH ) were directly reflected in the designprocess. The mathematical model of every link of the system was determined and the discrete model blockdiagram of the closed loop system was got in the first place. And then,the time domain performance in-dex was transformed into the open-loop frequency domain feature value by engineering experience,whichwas followed by the analysis in the w’domain. In this paper,the tuning process contained current loop a-nalysis prior to speed loop. The simulation and experiment show that the results obtained by the proposedmethod meet the performance requirements,with an overshoot of less than 5% and settling time of about1. 92 s,which proves that this method can provide the guidance for parameter tuning of digital PI control-ler.

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Last Update: 2018-07-02