Passivity-Based Controller Applied to a Step-up/Step-down Converter for Battery Discharge Voltage Regulation

https://doi.org/10.58571/CNCA.AMCA.2025.020

Resumen: In this work, a passivity-based controller for a step-up/step-down converter is designed and validated through numerical results. The proposed control scheme consists of two control loops: an inner loop and an outer loop. The inner control loop is designed using passivity-based control techniques to track the inductor currents through damping injection and energy shaping. Additionally, an uncertainty estimator based on the immersion and invariance (I&I) approach is employed to enhance the robustness of the inner control loop. Meanwhile, the voltage regulation is handled by a PI controller, which maintains the voltage at the desired reference level. The proposed converter and control strategy are well-suited for regulating the voltage fluctuations of lithium-ion batteries when used as the input source to the converter.

¿Cómo citar?

Villanueva-Loredo, J., Langarica-Córdoba, D., Martinez-Rodriguez, P., Murguía-Ibarra, J., Rodriguez-Cortes, Ch. & Hernández-Gómez, A. (2025). Passivity-Based Controller Applied to a Step-up/Step-down Converter for Battery Discharge Voltage Regulation. Memorias del Congreso Nacional de Control Automático 2025, pp. 115-120. https://doi.org/10.58571/CNCA.AMCA.2025.020

Palabras clave

Passivity-based control, nonlinear control, parameter estimation, DC-DC set-up/step-down converter, lithium-ion batteries.

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