Model predictive control for current balancing in a four-phase buck converter

A. F. Yahaya, Jabbar and Mansor, Muhamad (2016) Model predictive control for current balancing in a four-phase buck converter. International Journal of Renewable Energy Research (IJRER), 6 (2). pp. 527-534. ISSN 1309-0127

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Multiphase buck topology offers smaller ripple current and lower component ratings. This, however, compromises unbalanced output current between each phase of an inductor which leads to over-current and inductor saturation issues. Often when discussing the linear control schemes, it involves the use of superposition theorem to understand the system’s response. However, the limitation of superposition theorem in this application is that it assumes the circuit to be completely linear. For components with nonlinear behaviour such as power switches and diodes, the analytical results may not be accurate resulting to unexpected behaviour as the algorithm is implemented on a real system. Hence, the use of a more advanced control scheme is necessary to improve a system with a non-linear characteristic. This paper proposes a current limit control (CLC) consists of MPC for inner loop control and PID for outer loop control for phase current balancing in a four-phase buck converter. The controller is designed to achieve balanced current for each phase with acceptable response time. The proposed system is designed using MATLAB/Simulink simulation software and verified by a laboratory prototype with a TMS320F28335 as the main controller. Simulation and experimental results are provided to validate the system performance.

Item Type: Article
Uncontrolled Keywords: Buck Converter; multiphase DC-DC; Current Controller; Lithium-ion battery; Renewable Energy
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1001-1841 Production of electric energy or power. Powerplants. Central stations
Divisions: Faculty of Electrical and Electronic Engineering > Department of Electrical Engineering
Depositing User: Miss Afiqah Faiqah Mohd Hafiz
Date Deposited: 15 Nov 2021 06:45
Last Modified: 15 Nov 2021 06:45

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