Resumo

MEDINA-SANCHEZ, Martín  e  NARANJO-CEVALLOS, Marjorie. Design of a Predictive Controller Applied to a Direct Current Buck Converter. Rev Politéc. (Quito) [online]. 2021, vol.47, n.1, pp.27-34. ISSN 2477-8990.  https://doi.org/10.33333/rp.vol47n1.03.

In the present article, the design of a predictive controller (MPC) applied to a buck DC converter is presented. At first, the mathematical analysis of the buck converter is shown and its linear and non-linear mathematical model is obtained, considering the continuous and discontinuous conduction modes of the converter. The methodology to design the predictive controller based on the dynamic matrix control method is presented, and to reduce the computational load, cost function of the predictive controller is analytically optimized. To contrast the benefits of MPC control, the design of a conventional proportional, integral and derivative (PID) controller is proposed. Through simulation, the temporary transient response of the plant non-linear system under the MPC and PID controllers are evaluated. It is concluded that the response of the plant with the MPC controller presents an acceptable transient response and without error in steady state. Finally, the benefits of each of the two designed controllers are compared.

Palavras-chave : Buck converter; Predictive Control; PID.

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