Adaptive Sensorless PI+Passivity-Based Control of a Boost Converter Supplying an Unknown CPL

Riffo, Sebastián; Gil-González, Walter; Montoya, Oscar Danilo; Restrepo, Carlos; Muñoz, Javier

doi:10.3390/math10224321

Cited by 11 publications

(3 citation statements)

References 32 publications

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“…In addition, experimental results are performed under several scenarios. In the studies by [42] and [43] presented the sensorless controllers to regulate the output voltage of the boost converter. However, these control laws are not optimal.…”

Section: Literature Reviewmentioning

confidence: 99%

A Sensorless Inverse Optimal Control Plus Integral Action to Regulate the Output Voltage in a Boost Converter Supplying an Unknown DC Load

et al. 2023

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This study utilizes inverse optimal control (IOC) theory to address the issue of output voltage regulation in a boost converter feeding an unknown direct current (DC) load. The proposed approach involves developing a general feedback control law through IOC to ensure asymptotic stability in closed-loop operation, with the added advantage of incorporating an integral gain without compromising stability. Two estimators are introduced to minimize the number of sensors required for implementing the IOC controller with integral action. The first estimator, based on the immersion and invariance (I&I) method, determines the current demand of the DC load by measuring the boost converter's output voltage. While the second estimator, using the disturbance observer (DO) method, estimates the voltage input value by measuring the inductor's current flow. Both methods guarantee exponential convergence to the precise value of the estimated variable, irrespective of the initial estimation points. Experimental validation using varying DC loads and estimation techniques confirms the proposed IOC approach's effectiveness and robustness in regulating voltage for DC loads connected to a boost converter. Furthermore, the proposed controller is compared to the sliding mode control and presents a better performance with a more straightforward design, and the stability in closed-loop ensured.INDEX TERMS Inverse optimal control, sensorless control design, output voltage regulation, unknown DC load, disturbance observer estimator. NOMENCLATURE zVector that contains all the state variables. f (z) Vector of the soft nonlinear functions of the states.The associate editor coordinating the review of this manuscript and approving it for publication was Yinliang Xu .

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Section: Literature Reviewmentioning

confidence: 99%

A Sensorless Inverse Optimal Control Plus Integral Action to Regulate the Output Voltage in a Boost Converter Supplying an Unknown DC Load

et al. 2023

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“…The study by [41] described a global tracking, sensorless PI-PBC approach to regulate the output voltage of a DC-DC boost converter connected to a DC microgrid. The authors of [42] proposed a sensorless PI+PBC approach in a DC-DC converter in order to control its output voltage while it feeds a CPL.…”

Section: State Of the Art Reviewmentioning

confidence: 99%

Adaptive Voltage Control for Second-Order DC–DC Converters Supplying an Unknown Constant Power Load: A Generalized PBC Plus Damping Injection Design

et al. 2023

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This paper presents a generalized controller design to regulate the output voltage of secondorder DC-DC converters feeding an unknown constant power load (CPL). Passivity-based control plus damping injection theory is employed to design a generalized action control to stabilize DC-DC converters. Furthermore, starting from the immersion and invariance (I&I) method, a generalized observer for secondorder DC-DC converters is implemented to estimate the CPL value. By mixing the proposed controller with the I&I method, an adaptive generalized control approach is presented, which guarantees the locally asymptotic stability of the closed-loop for each converter. The main advantage of the nonlinear adaptive control design is its nonparametric dependence on the capacitance and inductance values, which makes it robust against parametric uncertainties. Phase portrait and sensitivity analyses are performed, and simulation and experimental results are examined to evaluate the performance of the proposed approach, which is also compared against feedback linearization and sliding mode control. Simulation and experimental results show the robustness and effectiveness of the adaptive proposed control approach.INDEX TERMS Second-order DC-DC converters, constant power load, passivity-based control, damping injection design, adaptive generalized control, immersion and invariance. NOMENCLATURE Acronyms ACAlternating current. CPL Constant power load. DC Direct current. FLC Sliding mode control.

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“…DC-DC buck-boost power converters are used in applications that need high flexibility for reducing or increasing voltage to a reference value [4]. These converters have been applied for supplying voltage to constant or variable loads [5], correcting the power factor in wind turbine systems, and controlling LED technology lighting circuits [6] and energy storage systems [7]. Some studies have developed mathematical models of ideal converters to describe them dynamically, as was done in [8].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Control of a DC-DC Buck–Boost Converter with Non-Linear Power Inductor Operating in Saturation Region Considering Electrical Losses

Molina-Santana,

Gonzalez-Montañez,

Liceaga-Castro

et al. 2023

Mathematics

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The present work proposes a nonlinear model of a buck–boost DC-DC power converter considering the nonlinear magnetic characteristics of the power inductor and electrical losses of the system. The Euler–Lagrange formalism is used for formulating the proposed model. Previous research works have reported mathematical models to describe power inductor dynamics. However, a gap in the literature remains regarding modeling this kind of element when it operates within power converters. Also, a linear-based controller scheme is proposed to regulate a non-ideal buck–boost DC-DC power converter. A methodology for tuning the proposed controller is presented, which considers the nonlinear model structure of the power converter, the linearization procedure based on an identification process, and a frequency domain analysis based on the approximated linear model. Finally, the tuned control scheme is tested on the nonlinear model of the power converter under several operational conditions showing excellent performance by effectively regulating the output voltage. The results are compared with those derived from alternative control strategies, and a better performance is generally obtained.

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Adaptive Sensorless PI+Passivity-Based Control of a Boost Converter Supplying an Unknown CPL

Cited by 11 publications

References 32 publications

A Sensorless Inverse Optimal Control Plus Integral Action to Regulate the Output Voltage in a Boost Converter Supplying an Unknown DC Load

A Sensorless Inverse Optimal Control Plus Integral Action to Regulate the Output Voltage in a Boost Converter Supplying an Unknown DC Load

Adaptive Voltage Control for Second-Order DC–DC Converters Supplying an Unknown Constant Power Load: A Generalized PBC Plus Damping Injection Design

Modeling and Control of a DC-DC Buck–Boost Converter with Non-Linear Power Inductor Operating in Saturation Region Considering Electrical Losses

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