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    Wyświetlanie 1-13 z 13
    Tytuł:
    DC-DC boost-flyback converter functioning as input stage for one phase low power grid-connected inwerter
    Autorzy:
    Kawa, A.
    Penczek, A.
    Piróg, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/141671.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    DC-DC high-step-up converter
    boost converters
    microinverters
    renewable energy
    Opis:
    The paper treats about main problems of one phase DC-AC microinverters that allow single solar cell to be joined with the grid. One of the issues is to achieve high voltage gain with high efficiency in DC circuit, which is necessary for proper operation of inverter. The operating principles, results of practical implementation and investigations on boost-flyback converter, which meets mentioned demands, are presented. (high step-up DC-DC boost-flyback converter for single phase grid microinverter).
    Źródło:
    Archives of Electrical Engineering; 2014, 63, 3; 393-407
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review and comparison of high efficiency high power boost DC/DC converters for photovoltaic applications
    Autorzy:
    Dawidziuk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/200077.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    boost DC/DC converters
    high efficiency
    high power
    photovoltaic systems
    renewable energy
    Opis:
    Recent environmental issues have accelerated the use of more efficient and energy saving technologies in renewable energy systems. High power high efficiency boost DC/DC converters for the use in photovoltaic, fuel cell systems are discussed in this paper from the viewpoint of power losses and efficiency. State of the art converters with switching frequency within the range of 25 kHz with IGBTs to 100 kHz with power MOSFETs and the highest efficiency close to 98%, depending on the load conditions, is considered. A comparison and discussion of the highest efficiency high power DC/DC boost converters is also presented in this paper.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 499-506
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Averaged models of pulse-modulated DC-DC power converters. Part II. Models based on the separation of variables
    Autorzy:
    Janke, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/140855.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    power converters
    pulse width modulation (PWM)
    BUCK
    buck-boost
    BOOST
    averaged models
    Opis:
    The separation of variables approach to formulate the averaged models of DC-DC switch-mode power converters is presented in the paper. The proposed method is applied to basic converters such as BUCK, BOOST and BUCK-BOOST. The ideal converters or converters with parasitic resistances, working in CCM and in DCM mode are considered. The models are presented in the form of equation systems for large signal, steady-state and small-signal case. It is shown, that the models obtained by separation of variables approach differ in some situations from standard models based on switch averaging method.
    Źródło:
    Archives of Electrical Engineering; 2012, 61, 4; 633-654
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Averaged models of pulse-modulated DC-DC power converters. Part I. Discussion of standard methods
    Autorzy:
    Janke, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/140859.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    power converters
    pulse width modulation (PWM)
    BUCK
    BOOST
    buck-boost
    averaged models
    Opis:
    The averaged models of switch-mode DC-DC power converters are discussed. Two methods of averaged model derivation are considered - the first, based on statespace averaging and the second, on the switch averaging approach. The simplest converters: BUCK, BOOST and BUCK-BOOST working in CCM (continuous conduction mode) or DCM are taken as examples in detailed considerations. Apart from the ideal converters, the more realistic case of converters with parasitic resistances is analyzed. The switch averaging approach is used more frequently than the other and is believed to be more convenient in practical applications. It is shown however, that in the deriving the averaged models based on the switch-averaging approach, some informalities have been made, which may be the source of errors in the case of converters with parasitic resistances, or working in DCM mode.
    Źródło:
    Archives of Electrical Engineering; 2012, 61, 4; 609-631
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Boosting resonant switched-capacitor voltage tripler
    Autorzy:
    Chojowski, Maciej
    Sosnowski, Robert
    Baszyński, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/24202737.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    boost topology
    DC–DC converters
    switched capacitor converter
    Opis:
    This elaboration presents the concept of a unidirectional DC–DC switchedcapacitor converter operating as a voltage tripler. The system consists of two resonant cells with switched capacitors and chokes. This proposed converter topology achieves low voltages on semiconductor switches (diodes and transistors) compared to the classic SC series-parallel converter or the boost topology. The output voltage on the capacitors is reduced in the proposed converter because it is divided into two series-connected capacitors with asymmetric distribution. The presented results describe the analytical description of the system operation and the analytical equation for semiconductor currents. A simulation and experimental results have been performed. The system efficiency and three voltage gain values were measured in the experimental setup. The efficiency measured was also compared with the analytical determination curve for loss analysis and further converter optimization.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 2; 373--389
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Large-signal input characteristics of selected DC–DC switching converters. Part I. Continuous conduction mode
    Autorzy:
    Janke, Włodzimierz
    Bączek, Maciej
    Kraśniewski, Jarosław
    Walczak, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/141117.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    boost
    buck
    CCM
    DC–DC converters
    flyback
    input characteristics
    Opis:
    Large-signal input characteristics of three DC–DC converter types: buck, boost and flyback working in the continuous conduction mode (CCM), obtained by simulations and measurements are investigated. The results of investigations are presented in the form of the analytical formulas and the exemplary results of the measurements and two forms of simulations: based on the full description of the converter components and on the averaged models. The parasitic resistances of the converter components are included in the simulations and their influence on the simulation results is discussed.
    Źródło:
    Archives of Electrical Engineering; 2020, 69, 3; 739-750
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Large-signal input characteristics of selected DC–DC switching converters, Part II. Discontinuous conduction mode
    Autorzy:
    Janke, Włodzimierz
    Bączek, Maciej
    Kraśniewski, Jarosław
    Walczak, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/949887.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    boost
    buck
    DC–DC converters
    DCM
    flyback
    input characteristics
    Opis:
    Large-signal input characteristics of three DC–DC converter types: buck, boost and flyback working in the discontinuous conduction mode (DCM), obtained by precise large signal PSpice simulations, calculations based on averaged models and measurements are presented. The parasitic resistances of the converter components are included in the simulations. The specific features of the input characteristics in the DCM and the differences between the continuous conduction mode (CCM) and DCM are discussed.
    Źródło:
    Archives of Electrical Engineering; 2020, 69, 4; 801-813
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A High Gain Single Switch DC-DC Converter with Double Voltage Booster Switched Inductors
    Autorzy:
    Addagatla, Nagaraju
    Boini, Rajender
    Powiązania:
    https://bibliotekanauki.pl/articles/2201925.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    multilevel converter
    boost converter
    DC-DC converter
    high gain converters
    Opis:
    The research for novel power conversion topologies and the development of cutting-edge power component technologies are driven by the demand for renewable and much more efficient electricity generation, delivery, and conversion. Simulation and Analysis High Voltage Gain DC-DC Converter with Double Voltage Booster Switched Inductor for PV Applications are analyzed in this paper. Multilevel boost converter topologies recently reintroduced, are gaining popularity as a solution for industrial and transportation power systems because they enable the use of innovative, efficient, but relatively low voltage low-voltage devices at greater voltage and power levels. there is only one power switch on the converter that is planned here, three diodes, two capacitors, and two inductors to achieve ultra-high gain with better efficiency. High voltage gain, minimal switch stress, and the ability to lessen input-current ripple and capacitor voltage ripple are all benefits of the topology. When it switches complementary, the capacitors' ripple is reduced, which lowers the size requirement for the capacitors. A 12V, 500 watts prototype was analyzed, simulated and designed. at a duty cycle of 0.75 it is achieved high DC-DC gain i.e 19 and efficiency 93%. The practicality of the converter will be demonstrated by the close agreement between the analysis and simulation findings.
    Źródło:
    Advances in Science and Technology. Research Journal; 2023, 17, 2; 1--11
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modified small-signal models of BUCK, BOOST and BUCK-BOOST DC-DC converters
    Autorzy:
    Walczak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/118339.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    BUCK
    BOOST
    buck-boost
    line-to-output
    control-to-output
    parasitic resistance
    PWM converters
    small signal model
    DC-DC converters
    BUCK-BOOST
    rezystancje pasożytnicze w przetwornicach napięcia stałego
    modele małosygnałowe
    przetwornice napięcia stałego
    Opis:
    Various models of DC-DC converters have been presented in many references. This paper provides extended version of a common transfer functions (line-tooutput, control-to-output) of three most popular DC-DC converters BUCK, BOOST and BUCK-BOOST. The extension includes all parasitic resistances and additional voltage source created after linearization of diode characteristic.
    W dostępnej literaturze istnieje wiele modeli przetwornic napięcia stałego. Modele te różnią się między innymi rodzajem uwzględnianych rezystancji pasożytniczych. Niniejszy artykuł zawiera modele przetwornic napięcia stałego BUCK, BOOST oraz BUCK-BOOST, wyprowadzone przy pomocy techniki separacji zmiennych. Modele te uwzględniają zarówno rezystancje pasożytnicze wszystkich elementów przetwornicy jak i dodatkowe źródło napięcia powstałe po linearyzacji charakterystyki diody.
    Źródło:
    Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej; 2015, 8; 39-52
    1897-7421
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of an open-switch fault detection algorithm for a three-phase interleaved DC–DC boost converter in a photovoltaic system
    Autorzy:
    Boudjellal, Bilal
    Benslimane, Tara
    Powiązania:
    https://bibliotekanauki.pl/articles/27309944.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    DC–DC converters
    fault diagnosis
    interleaved boost converter
    open switch fault
    photovoltaic (PV) system
    Opis:
    This paper presents a novel fault detection algorithm for a three-phase interleaved DC–DC boost converter integrated in a photovoltaic system. Interleaved DC–DC converters have been used widely due to their advantages in terms of efficiency, ripple reductions, modularity and small filter components. The fault detection algorithm depends on the input current waveform as a fault indicator and does not require any additional sensors in the system. To guarantee service continuity, a fault tolerant topology is achieved by connecting a redundant switch to the interleaved converter. The proposed fault detection algorithm is validated under different scenarios by the obtained results.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 3; 661--676
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design, Analysis and Comparison of Si- and GaN-Based DC-DC Wide-Input-Voltage-Range Buck-Boost Converters
    Autorzy:
    Koszel, Mikołaj
    Grzejszczak, Piotr
    Nowatkiewicz, Bartosz
    Wolski, Kornel
    Powiązania:
    https://bibliotekanauki.pl/articles/1844528.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    buck-boost
    synchronous dc-dc converters
    GaN
    high efficiency
    ultracapacitor
    power losses
    SEPIC
    Ćuk
    Opis:
    The purpose of the article is a comparison between DC/DC topologies with a wide input voltage range. The research also explains how the implementation of GaN E-HEMT transistors influences the overall efficiency of the converter. The article presents a process of selection of the most efficient topology for stabilization of the battery storage voltage (9 V – 36 V) at the level of 24 V, which enables the usage of ultracapacitor energy storage in a wide range of applications, e.g., in automated electric vehicles. In order to choose the most suitable topology, simulation and laboratory research were conducted. The two most promising topologies were selected for verification in the experimental model. Each of the converters was constructed in two versions: with Si and with GaN E-HEMT transistors. The paper presents experimental research results that consist of precise power loss measurements and thermal analysis. The performance with an increased switching frequency of converters was also examined.
    Źródło:
    International Journal of Electronics and Telecommunications; 2021, 67, 3; 337-343
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of output conductance on characteristic frequencies of switch mode BUCK and BOOST converter
    Autorzy:
    Janke, W.
    Walczak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/140387.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pulse converters
    BUCK
    BOOST
    small-signal models
    control-to-output
    characteristics
    DCM boundary
    characteristic frequencies
    Opis:
    Characteristic frequencies corresponding to poles and zeros of small-signal control-to-output transfer functions of popular DC-DC converters (BUCK and BOOST) are analyzed. The main attention is paid to influence of load conductance on the characteristic frequencies for converters working in continuous conduction mode (CCM) as well as in discontinuous conduction mode (DCM). Parasitic resistances of all converter components are included in calculations. In addition the improved description of CCMDCM boundary is presented. The calculations are verified experimentally and good consistency of the results is observed.
    Źródło:
    Archives of Electrical Engineering; 2017, 66, 1; 165-178
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania symulacyjne charakterystyk przetwornic buck i boost z uwzględnieniem rezystancji pasożytniczych
    Autorzy:
    Walczak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/118412.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    BUCK
    BOOST
    step-down
    step-up
    DC-DC converter
    characteristics of converters
    parasitic resistance
    przetwornica
    charakterystyki przetwornic
    rezystancje pasożytnicze
    Opis:
    Two popular DC-DC power converters (BUCK and BOOST) have been discussed. Models of line-to-output and control-to-output transfer functions, considering all parasitic resistances, have been recalled. Based on those models examples of simulations corresponding to characteristics in frequency and time domain have been presented. The simulations have been performed with free of charge program called Scilab. All parameters of converters’ elements used for the simulations, including parasitic resistances, have been acquired during measurements. It means that simulated converters refer to a good approximation of real device which has been built and tested. Practical meaning of every simulation has been explained. The paper reveals differences between simulations of models considering three types of mathematical models which include: all, some of and none of a parasitic resistances. It is shown that simulations generated according to models considering only parasitic resistances of inductor and capacitor are substantially different from simulations achieved based on model, which additionally considers parasitic resistances of switching elements (transistor and diode).
    W niniejszej pracy przedstawiono transmitancje opisujące wpływ zmian napięcia wejściowego oraz współczynnika wypełnienia na amplitudę napięcia wyjściowego dwóch popularnych przetwornic BUCK i BOOST. Wspomniane transmitancje są modelami małosygnałowymi przebiegów uśrednionych na okres kluczowania wyżej wymienionych przetwornic. Przy pomocy programu Scilab wykonano symulacje tych modeli w dziedzinie częstotliwości i czasu. Przedstawione wyniki symulacji stanowią odpowiedź układu na skokowe oraz okresowe zmiany zarówno napięcia wejściowego jak i współczynnika wypełnienia oraz przedstawiają różnice pomiędzy trzema modelami przetwornic, które uwzględniają: wszystkie, część lub nie uwzględniają żadnych rezystancji pasożytniczych. Znaczenie poszczególnych charakterystyk przetwornic zostało wyjaśnione w tekście pracy.
    Źródło:
    Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej; 2013, 5; 37-53
    1897-7421
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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