Stability analysis of two-cell Buck converter driven DC motor with a discrete-time closed loop

Aroudi, Abdelali El; Peláez, Julián; Feki, Moez; Robert, Bruno

doi:10.1109/ssd.2009.4956779

Cited by 5 publications

(3 citation statements)

References 20 publications

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“…Instead of using the exact discrete-time model, Robert et al propose a new discrete-time modeling approach in order to identify the appearance conditions of unfamiliar running modes [13,14,19,20]…”

Section: Power Stage Systemmentioning

confidence: 99%

Bifurcations and Chaos in a Photovoltaic Plant

Abdelmoula

Robert

2019

Int. J. Bifurcation Chaos

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This paper presents a comprehensive approach to analyze the dynamics of a photovoltaic system by using a discrete-time modeling approach. The proposed structure consists of a photovoltaic array, a two-cell DC–DC buck converter and a load connected in cascade through a DC bus. The research efforts focus on the modeling process and stability analysis, which leads to an implementation with a comprehensive description validated through simulation results. The research efforts focus on the numeric simulation improvements and dynamic investigation of the photovoltaic system under digital controls. The chaotic behaviors that appear in the photovoltaic plant are then studied. The aim of the last part is to detail the stability study using numerical simulation.

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Section: Power Stage Systemmentioning

confidence: 99%

Bifurcations and Chaos in a Photovoltaic Plant

Abdelmoula

Robert

2019

Int. J. Bifurcation Chaos

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“…Unfortunately, the inclusion of the state variables of a controller with an integral action will make the matrix A non invertible and, thus, a symbolic discrete map cannot be derived. In [15], a closed-loop converter with a PI controller is modeled by considering only the proportional part of the controller, which is the dominant one at f sw /2, since sub-harmonic oscillations are analyzed at this frequency. However, in ripple-based controls, a pure integral type-I controller is usually used so this approach is not sufficient.…”

Section: Review Of Alternatives To Model Analyze Stability and mentioning

confidence: 99%

Accurate Analysis of Subharmonic Oscillations of <formula formulatype="inline"><tex Notation="TeX">$V^2$</tex></formula> and <formula formulatype="inline"><tex Notation="TeX">$V^2I_c$</tex></formula> Controls Applied to Buck Converter

Cortés

Šviković

Alou

et al. 2015

IEEE Trans. Power Electron.

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V 2 I c control provides very fast dynamic performance to the Buck converter both under load steps and under voltage reference steps. However, the design of this control is complex since it is prone to subharmonic oscillations and several parameters affect the stability of the system. This paper derives and validates a very accurate modeling and stability analysis of a closed-loop V 2 I c control using the Floquet theory. This allows the derivation of sensitivity analysis to design a robust converter. The proposed methodology is validated on a 5-MHz Buck converter. The work is also extended to V 2 control using the same methodology, showing high accuracy and robustness. The paper also demonstrates, on the V 2 control, that even a low bandwidth-linear controller can affect the stability of a ripple-based control.Index Terms-Control of dc/dc converters, ripple based, robustness, V2, V2Ic.

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“…Unfortunately, the inclusion of the state variables of a controller with a integral action will make the matrix A non invertible and, thus, a symbolic discrete map cannot be derived. El-Aroudi et al [12] simplified a a closed-loop converter with a PI controller by considering only the proportional part as, at f sw /2, is the one defining the stability. However, in ripple-based controls a pure integral type-I controller is usually used, so this approach is not valid.…”

Section: Review Of Alternativesmentioning

confidence: 99%

Design and analysis of ripple-based controllers for buck converters based on discrete modeling and Floquet theory

Cortés¹,

Šviković²,

Alou³

et al. 2013

2013 IEEE 14th Workshop on Control and Modeling for Power Electronics (COMPEL)

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Ripple-based controls can strongly reduce the required output capacitance in PowerSoC converter thanks to a very fast dynamic response. Unfortunately, these controls are prone to sub-harmonic oscillations and several parameters affect the stability of these systems. This paper derives and validates a simulation-based modeling and stability analysis of a closed-loop V 2 Ic control applied to a 5 MHz Buck converter using discrete modeling and Floquet theory to predict stability. This allows the derivation of sensitivity analysis to design robust systems. The work is extended to different V 2 architectures using the same methodology.

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Stability analysis of two-cell Buck converter driven DC motor with a discrete-time closed loop

Cited by 5 publications

References 20 publications

Bifurcations and Chaos in a Photovoltaic Plant

Bifurcations and Chaos in a Photovoltaic Plant

Accurate Analysis of Subharmonic Oscillations of <formula formulatype="inline"><tex Notation="TeX">$V^2$</tex></formula> and <formula formulatype="inline"><tex Notation="TeX">$V^2I_c$</tex></formula> Controls Applied to Buck Converter

Design and analysis of ripple-based controllers for buck converters based on discrete modeling and Floquet theory

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