Decoupled Voltage Mode Control of Coupled Inductor Single-Input Dual-Output Buck Converter

Nayak, Gayatri; Nath, Shabari

doi:10.1109/tia.2020.2991650

Cited by 24 publications

(6 citation statements)

References 32 publications

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“…For LQR design purposes, assuming that the SIMO converter operates, in steady state, around operation point: (20), the corresponding open-loop transfer function matrix 𝐺𝐺(𝑠𝑠) = 𝐶𝐶(𝑠𝑠𝐼𝐼 − 𝐴𝐴) −1 𝐵𝐵 + 𝐷𝐷 has been computed. For discrete system model with sample time (ts=0.5 ms) the resulting maximum singular values for the sensitivity and complementary matrices transfer functions, S(z -1 ) and T(z -1 ), for the uncompensated closed-loop system (i. e., with an initial controller matrix K0=I2x2) are presented in Figure 3.…”

Section: Linear Quadratic Regulator Designmentioning

confidence: 99%

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Experimental Evaluation of the Robust Controllers Applied on a Single Inductor Multiple Output DC-DC Buck Converter to Minimize Cross Regulation Considering Parametric Uncertainties and CPL Power Variations

Saavedra,

Barra Junior,

Medeiros

et al. 2024

Preprint

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This paper presents two control design strategies for voltage regulation in a single inductor dual output (SIDO) DC-DC Buck converter system. Based on a nominal multiple input multiple output (MIMO) plant model and performance requirements, both an LQR and a decoupled PI control laws are designed to control the power converter system, under parametric uncertainties such as voltage source variation, CPL power variation, and load resistance variation. Therefore, the SIDO converter can cascade operating, which may cause the undesired effects of voltage oscillation and reduce the system's stability margin. The control performance was assessed under both uncertainties resistive loading and power variation of a constant power load (CPL). A SIDO DC-DC Buck converter board has been developed for experimental tests. The experimental results show that the LQR strategy, compared to the PI strategy, presented a robust performance in the presence of parametric uncertainties in the resistive loads being, however, sensitive to uncertainties due to the presence of CPL loads.

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Section: Linear Quadratic Regulator Designmentioning

confidence: 99%

“…Therefore, a complex automatic control system is required to maintain good performance regulation at different output voltage levels while minimizing the negative effects of the strong coupling between control loops. To this end, several studies have proposed solutions to mitigate coupling effects in DC-DC SIMO converters [12,15,[18][19][20][21][22][23][24].…”

mentioning

confidence: 99%

Experimental Evaluation of the Robust Controllers Applied on a Single Inductor Multiple Output DC-DC Buck Converter to Minimize Cross Regulation Considering Parametric Uncertainties and CPL Power Variations

Saavedra,

Barra Junior,

Medeiros

et al. 2024

Preprint

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“…To overcome these limitations, the embedded-based control strategy is increasingly being used in synchronous buck converters [12], [13]. The digital embedded system acts as the brain of the converter, providing precise and adaptive control of the switching signal based on the feedback signal from the output voltage and current sensors.…”

Section: Int J Elec and Comp Engmentioning

confidence: 99%

Fuzzy control of synchronous buck converters utilizing fuzzy inference system for renewable energy applications

Martinez

Ariza

Sarmiento

2023

IJECE

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<p>In the present research, an innovative fuzzy control approach is developed specifically for synchronous buck converters utilized in renewable energy applications. The proposed control strategy effectively manages load changes, nonlinear loads, and input voltage variations while improving both stability and transient response. The method employs a fuzzy inference system (FIS) that integrates adaptive control, feedforward control, and multivariable control to guarantee optimal performance under a wide range of operating conditions. The design of the control scheme involves formulating a rule base connecting input variables to an output variable, which signifies the duty cycle of the switching signal. The rule base is configured to dynamically modify control rules and membership functions in accordance with load conditions, input voltage fluctuations, and other contributing factors. The performance of the control scheme is evaluated in comparison to conventional techniques, such as proportional integral derivative (PID) control. Results indicate that the advanced fuzzy control approach surpasses traditional methods in terms of voltage regulation, stability, and transient response, particularly when faced with variable load conditions and input voltage changes. As a result, this control scheme is highly compatible with renewable energy systems, encompassing solar and wind power installations where input voltage and load conditions may experience considerable fluctuations. This research highlights the potential of the proposed fuzzy control approach to significantly enhance the performance and reliability of renewable energy systems.</p>

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“…Multi-output converters can be utilized when different types of output voltages are required in power conversion applications. As the need for multi-output power supply in various industrial applications such as telecommunication equipment and medical devices increases, studies on multi-output converters with simple structure, high efficiency, and improved cross regulation characteristics are being actively conducted [1][2][3][4][5][6][7][8]. As part of these studies, a new multi-output converter called fly-buck converter has been proposed in [9].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design for Output Voltage Regulation in Constant-on-Time-Controlled Fly-Buck Converter

Cho¹,

Jang²

2021

Electronics

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Fly-buck converter is a multi-output converter with the structure of a synchronous buck converter structure on the primary side and a flyback converter structure on the secondary side, and can be utilized in various applications due to its many advantages. In terms of control, the primary side of the fly-buck converter has the same structure as a synchronous buck converter, allowing the constant-on-time (COT) control to be applied to the fly-buck converter. However, due to the inherent energy transfer principle, the primary-side output voltage regulation of COT controlled fly-buck converters may be poor, which can deteriorate the overall converter performance. Therefore, the primary output capacitor must be carefully designed to improve the voltage regulation characteristics. In this paper, a theoretical analysis of the output voltage regulation in COT controlled fly-buck converter is conducted, and based on this, a design guideline for the primary output capacitor considering the output voltage regulation is presented. The validity of the analysis and design guidelines was verified using a 5 W prototype of the COT controlled fly-buck converter for telecommunication auxiliary power supply.

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Decoupled Voltage Mode Control of Coupled Inductor Single-Input Dual-Output Buck Converter

Cited by 24 publications

References 32 publications

Experimental Evaluation of the Robust Controllers Applied on a Single Inductor Multiple Output DC-DC Buck Converter to Minimize Cross Regulation Considering Parametric Uncertainties and CPL Power Variations

Experimental Evaluation of the Robust Controllers Applied on a Single Inductor Multiple Output DC-DC Buck Converter to Minimize Cross Regulation Considering Parametric Uncertainties and CPL Power Variations

Fuzzy control of synchronous buck converters utilizing fuzzy inference system for renewable energy applications

Analysis and Design for Output Voltage Regulation in Constant-on-Time-Controlled Fly-Buck Converter

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