Open AccessImproved discrete-time model for a digital controlled single-phase full-bridge voltage inverter
Author(s) -
Wu Xuan-Luuml;,
Guochun Xiao,
Bo Lei
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.050503
Subject(s) - computer science , control theory (sociology) , discrete time and continuous time , inverter , voltage , filter (signal processing) , digital control , inductor , capacitor , stability (learning theory) , process (computing) , electronic engineering , control (management) , mathematics , engineering , electrical engineering , statistics , artificial intelligence , machine learning , computer vision , operating system
An improved discrete-time model for a digital controlled single-phase full-bridge voltage inverter is proposed in this paper. Based on state-space averaging in every switching cycle, the improved discrete-time model combines the advantages of the average model and the traditional discrete-time model, which can accurately analyze the digital control delay and sample-and-hold process inherently in digital controlled system. Consequently, under the accuracy premise, the improved discrete-time model can effectively simplify the traditional discrete-time modeling. As an example, an LC filter capacitor-voltage and inductor-current feed-back plus voltage-reference feed-forward control algorithm is analyzed based on the improved discrete-time model. The stability boundary and oscillation frequency are accurately predicted. Finally, theoretical results are verified by simulations and experiments.