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

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...

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Main Authors: Yahaya, J.A.F., Mansor, M.
Format: Article
Language:en_US
Published: 2017
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Institution: Universiti Tenaga Nasional
Language: en_US
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spelling my.uniten.dspace-59272018-01-18T04:02:33Z Model predictive control for current balancing in a four-phase buck converter Yahaya, J.A.F. Mansor, M. 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. 2017-12-08T07:41:16Z 2017-12-08T07:41:16Z 2016 Article https://pure.uniten.edu.my/en/publications/model-predictive-control-for-current-balancing-in-a-four-phase-bu en_US Model predictive control for current balancing in a four-phase buck converter. International Journal of Renewable Energy Research, 6(2), 527-534
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
language en_US
description 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.
format Article
author Yahaya, J.A.F.
Mansor, M.
spellingShingle Yahaya, J.A.F.
Mansor, M.
Model predictive control for current balancing in a four-phase buck converter
author_facet Yahaya, J.A.F.
Mansor, M.
author_sort Yahaya, J.A.F.
title Model predictive control for current balancing in a four-phase buck converter
title_short Model predictive control for current balancing in a four-phase buck converter
title_full Model predictive control for current balancing in a four-phase buck converter
title_fullStr Model predictive control for current balancing in a four-phase buck converter
title_full_unstemmed Model predictive control for current balancing in a four-phase buck converter
title_sort model predictive control for current balancing in a four-phase buck converter
publishDate 2017
_version_ 1644493801964699648