Loading...

Global hybrid modeling and control of a buck converter: a novel concept

Hejri, M ; Sharif University of Technology | 2009

917 Viewed
  1. Type of Document: Article
  2. DOI: 10.1002/cta.521
  3. Publisher: 2009
  4. Abstract:
  5. Several attempts have been made to design suitable controllers for DC-DC converters. However, these designs suffer from model inaccuracy or their inability to desirably function in both continuous and discontinuous current modes. This paper presents a novel switching scheme based on hybrid modeling to control a buck converter using mixed logical dynamical (MLD) methodologies. The proposed method is capable of globally controlling the converter in both continuous and discontinuous current modes of operation by considering all constraints in the physical plant such as maximum inductor current and capacitor voltage limits. Different loads and input voltage disturbances are simulated in MATLAB and results are presented to demonstrate the suitability of the controller. The transient and steady-state performance of the closed-loop control over a wide range of operating points show satisfactory operation of the proposed controller. © 2008 John Wiley & Sons, Ltd
  6. Keywords:
  7. Buck converters ; Capacitor voltages ; Closed-loop control ; Dc-dc buck converter ; Discontinuous current mode ; Hybrid modeling ; Inductor currents ; Input voltage disturbances ; Mixed logical dynamical ; Mixed logical dynamical (mld) systems ; Mixed-integer quadratic programming (miqp) ; Model inaccuracy ; Model predictive control (mpc) ; Novel concept ; Operating points ; Physical plants ; Steady state performance ; Switching scheme ; Closed loop control systems ; Hybrid computers ; Hybrid systems ; Integer programming ; MATLAB ; Model predictive control ; Predictive control systems ; Controllers
  8. Source: International Journal of Circuit Theory and Applications ; Volume 37, Issue 9 , 2009 , Pages 968-986 ; 00989886 (ISSN)
  9. URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/cta.521