Author, as appears in the article.: Kaoubaa, Karama; Pelaez-Restrepo, J; Feki, M; Robert, B G M; El Aroudi, A
Department: Enginyeria Electrònica, Elèctrica i Automàtica
URV's Author/s: El Aroudi Chaoui, Abdelali
Keywords: Zero currents Time-domain waveforms Theoretical result Switching devices Subharmonics Static error Static and dynamic performance Start-ups Stability regions Settling time Proportional controller Prediction tools Pi controller Nonlinear analysis Multicell Multi-cell converter Lyapunov stability theory Lyapunov stability Load currents Dynamic tdfc Dynamic controller Digital control systems Digital control Dc-dc buck converter Cytology Controllers Circuit-based models Cells Bifurcation diagram Bifurcation (mathematics)
Abstract: Multi-cell converters have been developed to overcome shortcomings in usual switching devices. The control system in these circuits is twofold: first, to balance voltages of the switches and second to regulate the load current to a desired value. However, with a purely proportional controller, the system presents a static error. With a PI controller the static error is annihilated, but at the expense of shortening the stability region and increasing settling time. In this work, a zero static error dynamic controller for a two-cell DC-DC buck converter is designed. To achieve zero current error, we propose a generalized scheme of a dynamic controller. Then, using nonlinear analysis and Lyapunov stability theory and bifurcation prediction tools, we prove that zero static error is achieved. The proposed controller outperforms the PI controller in terms of settling time in the presence of saturating effect during the start-up transients. Numerical simulations in the form of time domain waveforms and bifurcation diagrams from switched circuit-based model are presented to confirm our theoretical results. Copyright © 2010 John Wiley & Sons, Ltd.
Thematic Areas: Engineering, electrical & electronic Engenharias iv Electronic, optical and magnetic materials Electrical and electronic engineering Computer science applications Astronomia / física Applied mathematics
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: abdelali.elaroudi@urv.cat
Author identifier: 0000-0001-9103-7762
Record's date: 2024-10-12
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://onlinelibrary.wiley.com/doi/abs/10.1002/cta.735
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: International Journal Of Circuit Theory And Applications. 40 (4): 395-407
APA: Kaoubaa, Karama; Pelaez-Restrepo, J; Feki, M; Robert, B G M; El Aroudi, A (2012). Improved static and dynamic performances of a two-cell DC-DC buck converter using a digital dynamic time-delayed control. International Journal Of Circuit Theory And Applications, 40(4), 395-407. DOI: 10.1002/cta.735
Article's DOI: 10.1002/cta.735
Entity: Universitat Rovira i Virgili
Journal publication year: 2012
Publication Type: Journal Publications