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    Wyświetlanie 1-6 z 6
    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:
    Power electronics controlled current source based on a multi-converter topology
    Autorzy:
    Gwóźdź, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/377872.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    active power filter
    converter control
    interleaved converters
    PWM
    Opis:
    The paper presents the idea of power electronics voltage controlled current source (VCCS) which is able much more precise mapping of its output current in a reference signal, compared to a typical converter solution. It can be achieved by means of such interconnection of two separate converters that one of them corrects a total output current towards a reference signal. An output power of auxiliary converter is much lower than an output power of main one but its frequency response is extended. Thanks to continuous work of this converter also pulse modulation components in a total output current are minimized. In the paper an exemplary application of a current source, as an execution block of active power filter (APF), is presented.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2016, 87; 389-396
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    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:
    Design, development and verification of a new multilevel inverter for reduced power switches
    Autorzy:
    Mahato, Bidyut
    Ranjan, Mrinal
    Pal, Pradipta Kumar
    Gupta, Santosh Kumar
    Mahto, Kailash Mahto
    Powiązania:
    https://bibliotekanauki.pl/articles/2172807.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    7-level/13-level inverter
    DC-AC converters
    power-electronic switches
    sinusoidal PWM
    Opis:
    Due to recent developments in the field of high-power and medium-voltage, the multilevel inverter has raised to such an extent owing to some of its amazing facts regarding harmonic spectrum, ease in control, reduced electromagnetic interference (EMI), filterless circuit, stress on power switches, common-mode voltage. This paper well describes a novel architecture of a single-phase multilevel inverter using a lesser number of overall components, especially the power switches. The proposed topology is generalized in the structure that can generate any number of voltage steps. A 7-level structure of the proposed topology is explained and is elaborately discussed. Simulation is carried out in MATLAB and corresponding experimental results verify the existence of the proposed multilevel inverter. The real-time experimental results were presented and are well verified by the simulation results for 7-level as well for 13-level across RL-Load. The nature of load current is also indicated as per the nature of load voltage. Nevertheless, the topology is further compared with some of the recent literature and found superior in each respect.
    Źródło:
    Archives of Electrical Engineering; 2022, 71, 4; 1051--1063
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling and simulation of stand-alone hybrid power system with fuzzy MPPT for remote load application
    Autorzy:
    Bogaraj, T.
    Kanakaraj, J.
    Chelladurai, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/140494.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Solar PV system
    Wind energy conversion system
    Hybrid power system
    DC-DC converters
    fuzzy logic based MPPT
    Three phase PWM inverter
    Opis:
    Many parts of remote locations in the world are not electrified even in this Advanced Technology Era. To provide electricity in such remote places renewable hybrid energy systems are very much suitable. In this paper PV/Wind/Battery Hybrid Power System (HPS) is considered to provide an economical and sustainable power to a remote load. HPS can supply the maximum power to the load at a particular operating point which is generally called as Maximum Power Point (MPP). Fuzzy Logic based MPPT (FLMPPT) control method has been implemented for both Solar and Wind Power Systems. FLMPPT control technique is implemented to generate the optimal reference voltage for the first stage of DC-DC Boost converter in both the PV and Wind energy system. The HPS is tested with variable solar irradiation, temperature, and wind speed. The FLMPPT method is compared with P&O MPPT method. The proposed method provides a good maximum power operation of the hybrid system at all operating conditions. In order to combine both sources, the DC bus voltage is made constant by employing PI Controllers for the second stage of DC-DC Buck-Boost converter in both Solar and Wind Power Systems. Battery Bank is used to store excess power from Renewable Energy Sources (RES) and to provide continuous power to load when the RES power is less than load power. A SPWM inverter is designed to convert DC power into AC to supply three phase load. An LC filter is also used at the output of inverter to get sinusoidal current from the PWM inverter. The entire system was modeled and simulated in Matlab/Simulink Environment. The results presented show the validation of the HPS design.
    Źródło:
    Archives of Electrical Engineering; 2015, 64, 3; 487-504
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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