Stability analysis of a closed-loop control for a pulse width modulated DC motor drive

Gürbüz F., Akpınar E.

Turkish Journal of Electrical Engineering and Computer Sciences, vol.10, no.3, pp.427-438, 2002 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 10 Issue: 3
  • Publication Date: 2002
  • Journal Name: Turkish Journal of Electrical Engineering and Computer Sciences
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.427-438
  • Keywords: DC drive, Pulse width modulation (PWM), Stability analysis
  • Dokuz Eylül University Affiliated: Yes

Abstract

In this paper, the effect of the variation of amplitude and the chopping period of a PWM signal on the stability of a closed-loop control for a DC motor drive is investigated. First, the entire system is formulated as a Linear Quadratic (LQ) tracker with output feedback. Then, stability analysis for the varying amplitude and the varying chopping period is carried out by the methods of root locus and the Jury test. Finally, stability limits obtained from a root locus and Jury test are checked by the simulation of the system in MATLAB.