Authors: FATMA GÜRBÜZ, EYÜP AKPINAR
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.
Keywords: pulse width modulation (PWM), DC drive, stability analysis.
Full Text: PDF