Output Voltage Regulation for dc-dc Buck Converters: a Passivity-Based PI Design

GIL-GONZALEZ, W.; MONTOYA, O. D.; GARCES, A.; SERRA, F. M.; MAGALDI, G. L.

Armenia, Quindio

Congreso; 10th IEEE Latin American Symposium on Circuits and Systems (LASCAS); 2019

This paper presents a global tracking passivity-based proportional-integral (PI) control for output voltage regulation of a dc-dc Buck converter. The proposed controller is based on passivity formulation since dc-dc Buck converter has a passive structure in open-loop. Additionally, the controller takes advantage of the PI actions to design a control law that guarantees asymptotically stability in the Lyapunov´s sense under closed-loop operation. The proposed controller does not depend on the parameters, which makes it a robust controller. The robustness of the proposed controller is checked by comparing its dynamical performance in front of a conventional PID controller. All simulation results are fulfilled via MATLAB software.