Input Small-Signal Characteristics of Selected DC–DC Switching Converters

Janke, W.; Bączek, M.; Kraśniewski, Jarosław; Walczak, Marcin

doi:10.3390/en15051924

Cited by 4 publications

(6 citation statements)

References 23 publications

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“…This can cause an MPPT system to be working at a false maximum power point, which translates to a lower overall efficiency of the system. To measure voltages and currents in a steady state, one can determine the initial delay by using a small-signal model [30]. However, the transients can look differently for different duty cycles, especially in asynchronous converters and between continuous and discontinuous conduction modes (CCM, DCM); therefore, setting just one delay requires choosing the worst-case scenario, which often translates to a longer measurement time and thus lower efficiency of the system.…”

Section: Methodsmentioning

confidence: 99%

Transients in Input and Output Signals in DC–DC Converters Working in Maximum Power Point Tracking Systems

Walczak

Bychto

2023

Energies

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Designing a maximum power point tracking system (MPPT) can raise many questions when it comes to choosing the best converter and algorithm for the job. The number of possible solutions can be overwhelming, especially when it comes to MPPT algorithms. New algorithms are often tested in simulation environments only, where the accuracy and speed of a single measurement (i.e., in a single step) are usually assumed and sometimes unintentionally exaggerated. In practice, even if the algorithm is fast, its speed is limited by other factors. This article emphasizes the time limitations that are related to converter parameters and that naturally exist in all maximum power point tracking systems. Additionally, the article proposes a measurement method that enables voltage and current measurements with good accuracy for different transients that exist at the input and output of DC–DC converters.

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Section: Methodsmentioning

confidence: 99%

Transients in Input and Output Signals in DC–DC Converters Working in Maximum Power Point Tracking Systems

Walczak

Bychto

2023

Energies

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“…Higher values of the inductance would increase transient response time, which would translate to extended time of maximum power point tracking, and thus lower the efficiency of the MPPT system [24]. The model of the converter, describing the input current response to a duty cycle perturbation is presented in equations ( 1)-( 8) [25]. The model describes the input current of the converter working in the continuous conduction mode (CCM) and includes all parasitic resistances, which was proven to be relevant in terms of transient time calculations [25].…”

Section: Dc/dc Convertermentioning

confidence: 99%

Design and evaluation of a low-cost solar simulator and measurement system for low-power photovoltaic panels

Walczak,

Bychto,

Kraśniewski

et al. 2022

Metrology and Measurement Systems

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Research related to photovoltaic panels comprises different topics starting with modelling solar cells, finding new maximum power point tracking (MPPT) algorithms, testing existing ones or designing of DC/DC converters for MPPT systems and microgrids that incorporate photovoltaic energy sources. In each of the examples above a deep knowledge of photovoltaic panels is required, as well as a reliable measurement system that can deliver continuous, stable light with enough power to meet standard test conditions (STC) and that can ensure repeatable results. Therefore this paper presents a low-cost solar simulator with a microcontroller-based measurement system, that can be used for various measurements of low-power photovoltaic panels.

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“…Therefore, DC-DC power converters are essential for managing and maintaining the output voltage at a predetermined reference level [12][13][14]. Moreover, it is advantageous to develop a power converter that ensures a steady and minimal input current ripple.…”

Section: Introductionmentioning

confidence: 99%

A Single-Output-Filter Double Dual Ćuk Converter

Robles-Campos,

Rosas-Caro,

Valderrabano-Gonzalez

et al. 2024

Electronics

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This study introduces an innovative version of a recently studied converter. A Double Dual Ćuk Converter was recently studied with advantages like the possibility of designing it for achieving a low-input current ripple. The proposed converter, called the Improved Double Dual Ćuk Converter, maintains the advantages of the former one, and it is characterized by requiring one less capacitor and inductor than its predecessor. This allows addressing the challenge of optimizing the topology to reduce component count without compromising the operation; this work proposes an efficient design methodology based on theoretical analysis and experimental validation. Results demonstrate that the improved topology not only retains the advantages of the previous version, including high efficiency and robustness, but also enhances power density by reducing the number of components. These advancements open new possibilities for applications requiring compact and efficient power converters, such as renewable energy systems, electric vehicles, and portable power supply systems. This work underscores the importance of continuous innovation in power converter design and lays the groundwork for future research aimed at optimizing converter topologies. A detailed discussion of the operating principles and modeling of the converter is provided. Furthermore, simulation outcomes highlighting differences in steady-state duration, output voltage, input current ripple, and operational efficiency are shared. The results from an experimental test bench are also presented to corroborate the efficacy of the improved converter.

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Input Small-Signal Characteristics of Selected DC–DC Switching Converters

Cited by 4 publications

References 23 publications

Transients in Input and Output Signals in DC–DC Converters Working in Maximum Power Point Tracking Systems

Transients in Input and Output Signals in DC–DC Converters Working in Maximum Power Point Tracking Systems

Design and evaluation of a low-cost solar simulator and measurement system for low-power photovoltaic panels

A Single-Output-Filter Double Dual Ćuk Converter

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