Adaptive Control of Four-Quadrant DC-DC Converters in Both Discontinuous and Continuous Conduction Modes

Hicham Chaoui, Mohamad Alzayed, Okezie Okoye and Mehdy Khayamy
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Hicham Chaoui: Intelligent Robotic and Energy Systems (IRES), Department of Electronics, Carleton University, 1125 Colonel By Dr, Ottawa, ON K1S 5B6, Canada
Mohamad Alzayed: Intelligent Robotic and Energy Systems (IRES), Department of Electronics, Carleton University, 1125 Colonel By Dr, Ottawa, ON K1S 5B6, Canada
Okezie Okoye: Electrical & Computer Engineering, Tennessee Technological University, 220 W. 10th Street, Cookeville, TN 38505, USA
Mehdy Khayamy: Electrical & Computer Engineering, Tennessee Technological University, 220 W. 10th Street, Cookeville, TN 38505, USA

Energies, 2020, vol. 13, issue 16, 1-15

Abstract: The inherently different dynamics of a DC-DC converter while operating in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) necessitate an advanced controller to control the inductor current. A conventional PI controller cannot be used across both modes since it does not guarantee a smooth transition between both modes. Furthermore, in time-varying input-output voltage applications of the four-quadrant converter such as in battery charging applications, the location of the boundary between the CCM and the DCM changes dynamically, creating an uncertainty. Therefore, a robust controller is required to accurately track the inductor current in the presence of uncertainties. Thus, an adaptive controller is proposed in this work, which is based on the general inverse model of the four-quadrant converter in both modes. Moreover, gain scheduling is used to switch the parameters of the controller as the converter transits between the DCM and the CCM. The adaptability and effectiveness of the controller in ensuring a smooth transition is validated by numerical simulations conducted on various converter topologies. Experimental results are also presented for a buck converter.

Keywords: DC-DC converters; adaptive control; DCM; CCM (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: 2020
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