Control Scheme for a Quadratic-Based Step-Down On-Board DC/DC Converter to Be Used in Hybrid Electric Vehicles

Carlos Arturo Antuna-Fiscal, Jesus Leyva-Ramos, Ma. Guadalupe Ortiz-Lopez () and Luis Humberto Diaz-Saldierna
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Carlos Arturo Antuna-Fiscal: Control y Sistemas Dinamicos, Instituto Potosino de Investigación Científica y Tecnológica de San Luis Potosi (IPICYT), Camino a la Presa San Jose 2055, San Luis Potosi 78216, Mexico
Jesus Leyva-Ramos: Control y Sistemas Dinamicos, Instituto Potosino de Investigación Científica y Tecnológica de San Luis Potosi (IPICYT), Camino a la Presa San Jose 2055, San Luis Potosi 78216, Mexico
Ma. Guadalupe Ortiz-Lopez: ITMA Department, Universidad Politecnica de San Luis Potosi, Urbano Villalon 500, San Luis Potosi 78369, Mexico
Luis Humberto Diaz-Saldierna: Control y Sistemas Dinamicos, Instituto Potosino de Investigación Científica y Tecnológica de San Luis Potosi (IPICYT), Camino a la Presa San Jose 2055, San Luis Potosi 78216, Mexico

Energies, 2023, vol. 16, issue 20, 1-21

Abstract: This paper discusses a switching regulator with a quadratic-based step-down DC/DC converter designed using a reduced redundant power processing principle. This converter benefits from a non-complex topology, which aims to process energy more efficiently. The switching regulator can be used on-board in hybrid electric vehicles and has a non-pulsating input current, which is suitable to process energy from lithium-ion batteries. Design expressions and steady-state operating conditions are given for the converter. Models are obtained to design and implement a two-loop controller. The simplicity of this approach is of significant value in a method of design-oriented analysis, in which the analytic results can be used to make design choices. Loop-shaping techniques are used to design a robust controller to regulate the output voltage of the proposed converter under voltage variations on the lithium-ion batteries and the changes in load current requirements, as well as parameter uncertainties of the converter. The design conditions for the gains of the controller are derived. The models of the converter are verified through experimental results for a 300 W prototype and used to design a robust controller. Finally, closed-loop time and frequency domain tests are given to show the performance of the switching regulator.

Keywords: lithium-ion batteries; step-down DC/DC converter; loop-shaping control; hybrid electric vehicles (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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