Article
PI-Type Controllers and Σ-Δ Modulation for Saturated DC-DC Buck Power Converters
Author/s | Aguilar-Ibáñez, Carlos Fernando
Moreno Valenzuela, Javier García-Alarcon, Octavio Martinez-Lopez, Mizraim Acosta Rodríguez, José Ángel Suárez-Castañón, Miguel Santiago |
Department | Universidad de Sevilla. Departamento de Ingeniería de Sistemas y Automática |
Publication Date | 2021 |
Deposit Date | 2021-03-09 |
Published in |
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Abstract | Departing from analyzing a general input-saturated second-order system, a Lyapunov-based constructive procedure for the output-feedback stabilization of the constantly perturbed DC-DC buck power converter is presented. The ... Departing from analyzing a general input-saturated second-order system, a Lyapunov-based constructive procedure for the output-feedback stabilization of the constantly perturbed DC-DC buck power converter is presented. The proposed scheme also incorporates a Σ - Δ modulator. The obtained control scheme is developed in two parts: a proportional-integral-type family of algorithms devoted to regulating the uncertain system by using measurements of the output voltage and a Σ - Δ modulator dedicated to transforming the control action into a {0,1} discrete-valued signal. This modulator is a kind of a sliding controller, which can be seen as a subsystem with an on-off output. This combination, the PI-type family of controllers and the Σ - Δ modulator, assures the global stability of the closed-loop system, even if parametric uncertainties are presented. The convergence analysis was carried out using Lyapunov's method. The theoretical results are confirmed using real-time experimental tests, which demonstrate the anti-windup scheme and the Σ - Δ modulator efficiency. The experiments consider the saturation of the control input and disturbances, having obtained convincing results. |
Project ID. | 20200671
20201203 20201623 PGC2018-096265-B-I00 A1-S-24762 |
Citation | Aguilar-Ibáñez, C.F., Moreno Valenzuela, J., García-Alarcon, O., Martinez-Lopez, M., Acosta, J.Á. y Suárez-Castañón, M.S. (2021). PI-Type Controllers and Σ-Δ Modulation for Saturated DC-DC Buck Power Converters. IEEE Access, 9, 20346-20357. |
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