Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "DC/DC inverter" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-12 z 12
    Tytuł:
    Ograniczający łącznik napięcia przemiennego
    Current limiting switch of alternative voltage
    Autorzy:
    Bogusławski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/408284.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    ogranicznik prądu zwarciowego
    łącznik tyrystorowy
    napięcie przewodzenia
    przekształtnik DC/DC
    short circuit current limiter
    thyristor switch
    forward on-state voltage
    DC/DC inverter
    Opis:
    Na podstawie znanej koncepcji tyrystorowego ogranicznika prądu zwarciowego przedstawiono modyfikację tego układu do zastosowania także jako łącznik niewielkich prądów roboczych. Zaproponowano przekształtniki DC/DC sterujące działaniem łącznika i pośrednio zmniejszające wpływ temperatury oraz przedstawiono orientacyjnie symulowane przebiegi w obwodzie z łącznikiem jednofazowym. W podsumowaniu wskazano pokrótce na konsekwencje jego zastosowania.
    Based on literature study of known thyristor limiters and the modification providing of a low current switch function was presented. The proposed DC/DC inverters for control and temperature indirect independency was described. Preliminary results of one phase switch circuit simulation are included. In summary succession problems of application was shortly pointed out.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2014, 2; 37-40
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Resonant DC link inverters for AC motor drive systems – critical evaluation
    Autorzy:
    Turzyński, Marek
    Chrzan, P. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/200688.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    soft-switching
    resonant DC link inverter
    quasiresonant DC link inverter
    common-mode voltage
    voltage gradient
    zero voltage switching
    przekształtnik quasirezonansowy DC
    gradient napięcia
    przekształtnik rezonansowy DC/DC
    Opis:
    In this survey paper, resonant and quasiresonant DC link inverters are reexamined for AC motor drive applications. Critical evaluation of representative topologies is based on simulation and waveform analysis to characterize current/voltage stress of components, control timing constraints and feasibility. A special concern over inverter common-mode voltage and voltage gradient du/dt limitation capacity is discussed for motor bearing and winding insulation safety. Experimental records of the laboratory developed parallel quasiresonant DC link inverter feeding induction motor confirm results of analysis. Comparative tables and simulation results demonstrate characteristic features of various schemes.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 2; 241-252
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modern Direct Torque and Flux Control methods of an induction machine supplied by three-level inverter
    Autorzy:
    Sikorski, A.
    Kulikowski, K.
    Korzeniewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/201199.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    asynchronous machine
    DC/AC inverter
    DTC
    flux and torque control
    3-level DC/AC inverter
    Opis:
    This paper describes two modern direct torque and flux control methods of an induction machine supplied by a three-level inverter. Additionally, it presents a comparison of the methods both in static and dynamic states. The methods, in a specific way, make use of an increased number of active vectors of the three-level inverter in order to improve control quality and reduce switching frequency. The two methods modify the DTC method by using its advantages and eliminating, at the same time its drawbacks. In static states the comparison was based on the results of investigations performed for two different load values and three set values of angular speed, whereas in dynamic states the comparison was focused on the behavior of the machine at startup. The results of the investigations have shown that both methods give very good performance. They are characterized by both sinusoidal shape of flux and low current deformations even at low angular speeds i.e. less than 10% of the nominal value. The presented methods also allow to generate nominal flux for set zero angular speed in order to achieve excitation of the induction machine. The switching frequencies for both methods are very similar in almost the whole range of control but the methods have shown some differences in control quality, particularly for higher torque values.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 771-778
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Transformer Class E Amplifier
    Autorzy:
    Mikolajewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/141694.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Class E amplifier
    resonant inverter
    DC-DC converter
    transformer
    leakage inductance
    Opis:
    In a high-efficiency Class E ZVS resonant amplifier a matching and isolation transformer can replace some or even all inductive components of the amplifier thus simplifying the circuit and reducing its cost. In the paper a theoretical analysis, a design example and its experimental verification for a transformer Class E amplifier are presented. In the experimental amplifier with a transformer as the only inductive component in the circuit high efficiency ηMAX = 0.95 was achieved for supply voltage VI = 36 V, maximum output power POMAX = 100 W and the switching frequency f = 300 kHz. Measured parameters and waveforms showed a good agreement with theoretical predictions. Moreover, the relative bandwidth of the switching frequency was only 19% to obtain output power control from 4.8 W to POMAX with efficiency not less than 0.9 in the regulation range.
    Źródło:
    Archives of Electrical Engineering; 2014, 63, 4; 621-633
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Natural capacitor voltage balance in multilevel flying capacitor converters. A review of research achievements
    Autorzy:
    Stala, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193250.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    flying capacitor converter
    natural capacitor voltage balance
    multilevel converter
    inverter
    DC-DC converter
    Opis:
    The flying-capacitor (FC) topology is one of the more well-established ideas of multilevel conversion, typically applied as an inverter. One of the biggest advantages of the FC converter is the ability to naturally balance capacitor voltage. When natural balancing occurs neither measurements, nor additional control is needed to maintain required capacitors voltage sharing. However, in order to achieve natural voltage balancing suitable conditions must be achieved such as the topology, number of levels, modulation strategy as well as impedance of the output circuitry. Nevertheless this method is effectively applied in various classes of the converter such as inverters, multicell DC-DC, switch-mode DC-DC, AC-AC, as well as rectifiers. The next important issue related to the natural balancing proces is its dynamics. Furthermore, in order to reinforce the balancing mechanism an auxiliary resonant balancing circuit is utilized in the converter which can also be critical in the AC-AC converters or switch mode DC-DC converters. This paper also presents an issue of choosing modulation strategy for the FC converter due to the fact that the natural balancing process is well-established for phase shifted PWM whilst other types of modulation can be more favorable for the power quality.
    Źródło:
    Power Electronics and Drives; 2016, 1, 36/2; 5-33
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The DC-side active filter with dual-buck full-bridge inverter for wind generators
    Autorzy:
    Chen, X-Q.
    Zhao, S-W.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/141358.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multi-pulse ac-dc converter
    auto-transformer
    harmonic suppression
    DC-side active filter
    dual-buck full-bridge inverter
    Opis:
    This paper proposes a new dc-side active filter for wind generators that combines 12-pulse polygon auto-transformer rectifier with dc-side current injection method and dual-buck full-bridge inverter having not the “shoot-through” problem in conventional bridge-type inverters, and therefore this system with the character low harmonic distortion and high reliability. The proposed dc-side active filter is realized by using dual-buck full bridge converter, which directly injects compensation current at dc-side of two six-pulse diode bridges rectifiers. Compared with the conventional three-phase active power filter at ac-side, the system with the dc-side active filter draws nearly sinusoidal current by shaping the diode bridges output current to be triangular without using the instantaneous reactive power compensation technology, only using simple hysteretic current control, even though under load variation and unbalanced voltage disturbances, and while an acceptable linear approximation to the accurate waveform of injection current is recommended. The performance of the system was simulated using MATLAB/Simulink, and the possibility of the dc-side active filter eliminating current harmonics was confirmed in steady and transient states. The simulation results indicate, the system has a total harmonic distortion of current reduced closely to 1%, and a high power factor on the wind generator side.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 2; 263--277
    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
    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:
    Space-vector pulsewidth modulation for a seven-level cascaded H-bridge inverter with the control of DC-link voltages
    Autorzy:
    Lewicki, A.
    Morawiec, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/200099.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cascade H-bridge inverter
    DC-link voltage control
    space vector modulation
    mostek H
    sterowanie napięciem
    modulacja
    Opis:
    A control strategy of DC-link voltages for a seven-level cascaded H-bridge inverter is proposed in this paper. The DC-link voltage balancing is accomplished by an appropriate selection of H-bridges and control of their duty cycles in space-vector modulation (SVM) algorithm. The proposed SVM method allows to maintain the same voltage level on all inverter capacitors. Regardless of the balancing function, the SVM strategy makes it possible to generate the output voltage vector properly also in the case where the DC-link voltages are not balanced. The results of simulation and experimental investigations are presented in the paper.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 5; 619-628
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Overview of Carrier-based Modulation Methods for Z-Source Inverter
    Autorzy:
    Roomi, Muhammad M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193846.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    AC/DC
    power conversion
    impedance source inverter
    modulation methods
    shoot through
    phase opposition disposition
    reference disposition
    Opis:
    Single-stage energy converters, in particular, the Z-Source Inverter (ZSI) or impedance source inverter, has gained significant attention in the recent years. ZSI ensures flexible energy conversions (dc–dc, dc–ac, ac–ac and ac–dc) because of its unique ability to boost the output voltage in typical renewable energy systems. The impedance network integrated between the energy source and the load contributes to the unique functionality of the ZSI. As substantial research has been conducted on the ZSI, this article provides a review on the operation of ZSI. The article initially examines the various topologies commonly adopted for the application of the ZSI. Subsequently, details of the various modulation methods that are commonly used to obtain the voltage boosting using ZSI are documented. Additionally, the phenomenon of neutral point formation, which is an important impediment to the adoption of multilevel ZSIs and the limitation of the modulation methods, is explained.
    Źródło:
    Power Electronics and Drives; 2019, 4, 39; 15-31
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estymacja napięcia niezrównoważenia w obwodzie pośredniczącym falownika trójpoziomowego NPC na podstawie analizy prądów wyjściowych
    Evaluation of the neutral-point voltage in the three-level NPC inverter based on analysis of output currents
    Autorzy:
    Szczepankowski, P.
    Nieznański, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/154081.pdf
    Data publikacji:
    2007
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    trójpoziomowy falownik napięcia
    modulacja szerokości impulsów
    stabilizacja napięcia punktu środkowego
    three-level NPC inverter
    pulse width modulation (PWM)
    control of the DC-link midpoint voltage
    Opis:
    Zaproponowano prostą i skuteczną metodę wyznaczania wartości napięcia niezrównoważenia w obwodzie pośredniczącym trójpoziomowego falownika NPC (ang. Neutral-Point-Clamped). Zastosowanie proponowanej metody nie wymaga dodatkowych czujników pomiarowych, a nakłady obliczeniowe na realizację algorytmu są niewielkie. Do wyznaczania napięcia niezrównoważenia wykorzystuje się informacje zawarte w mierzonych prądach wyjściowych falownika. Wymagana jest znajomość impedancji obciążenia. Przedstawiono wyniki badań symulacyjnych i laboratoryjnych potwierdzających prawidłowe działanie proponowanej metody.
    A simple and effective method is proposed for evaluating the neutral-point voltage in the three-level neutral-point-clamped (NPC) inverter. The method does not require extra sensors, and the use of computing resources is limited. The neutral-point voltage is estimated based on the current measurements. The proposed approach necessitates the knowledge of the load impedance. Sample simulation and experimental results are provided, confirming satisfactory working of the proposed method.
    Źródło:
    Pomiary Automatyka Kontrola; 2007, R. 53, nr 4, 4; 48-51
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pasywna stabilizacja rozkładu napięć w obwodzie pośredniczącym falownika trójpoziomowego NPC
    Passive control of the DC-link midpoint voltage in the three-level NPC inverter
    Autorzy:
    Szczepankowski, P.
    Nieznański, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/154083.pdf
    Data publikacji:
    2007
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    falownik trójpoziomowy
    modulacja szerokości impulsów
    pasywna stabilizacja napięcia punktu środkowego
    three-level NPC inverter
    pulse width modulation (PWM)
    passive control of the DC-link midpoint voltage
    Opis:
    Przedstawiono wyniki badań dotyczące pasywnej stabilizacji rozkładu napięć w obwodzie pośredniczącym falownika trójpoziomowego NPC wskazujące na dobre uwarunkowania tej metody i możliwość jej wykorzystania w zastosowaniach praktycznych. Odpowiednio skonstruowana stabilizacja pasywna zapewnia stateczną pracę z podtrzymywaniem równowagi napięć i powrót napięcia niezrównoważenia do zerowej wartości średniej po ewentualnym zaburzeniu tej równowagi.
    The paper presents and discusses some test results pertaining to the passive control of the DC-link midpoint voltage in the three-level NPC inverter. The results indicate that the method is well-behaved, insuring stable operation with balanced voltages across both capacitors in the DC link, convergence to a voltage balance after possible disturbances and low sensitivity to asymmetries in the inverter load.
    Źródło:
    Pomiary Automatyka Kontrola; 2007, R. 53, nr 4, 4; 44-47
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies