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    Wyświetlanie 1-14 z 14
    Tytuł:
    Single-source three-phase switched-capacitor-based MLI
    Autorzy:
    Jena, Kasinath
    Gupta, Krishna Kumar
    Bhatnagar, Pallavee
    Jain, Sanjay K.
    Stala, Robert
    Waradzyn, Zbigniew
    Piróg, Stanisław
    Penczek, Adam
    Mondzik, Andrzej
    Skała, Aleksander
    Powiązania:
    https://bibliotekanauki.pl/articles/2175942.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    multilevel inverter
    switched capacitor
    multicarrier pulse width modulation
    cost function
    ANPC inverter
    Opis:
    This article proposes a novel three-phase inverter based on the concept of switched capacitors (SCs), which uses a single DC source. A three-phase, seven-level line-to-line output voltage waveform is synthesised by the proposed topology, which includes eight switches, two capacitors, and one diode per phase leg. The proposed topology offers advantages in terms of inherent voltage gain, lower voltage stresses on power switches, and a reduced number of switching components. Additionally, the switched capacitors are self-balanced, thereby eliminating the need for a separate balancing circuit. The proposed structure and its operating principle, the self-balancing mechanism of the capacitors, and the control strategy are all thoroughly explained in the article. The proposed topology has also been compared with some recent SC topologies. Lastly, the proposed topology has been shown to be feasible through simulation and experimentation.
    Źródło:
    Power Electronics and Drives; 2022, 7, 42; 197--209
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance study of a new high instantaneous power impulse converter with a switched capacitor unit
    Autorzy:
    Zając, L.
    Malinowski, M.
    Styński, S.
    Jasiński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193281.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    high instantaneous power impulse converter
    impulse converter
    switched capacitor converter
    Opis:
    A new high instantaneous power impulse converter (HIPIC) with a switched capacitor unit has been presented. HIPIC generates very short impulses (hundreds of microseconds) of instantaneous power in megawatt range while the average power is much lower (tens of kilowatts). The presented topology is composed of step-down converters, an H-bridge converter and a switched capacitor, adjusted with a new current control. It allows one to achieve the output current impulses with very short rising and falling times and strict peak current control with low ripples.
    Źródło:
    Power Electronics and Drives; 2017, 2, 37/1; 5-15
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optymalizacja kształtu prądu wejściowego tyrystorowego przekształtnika z przełączanymi kondensatorami podnoszącego napięcie stałe o ładowaniu kolejnościowym
    The optimization of the shape of input current in thyristor based boost switched capacitor converter with sequence charging
    Autorzy:
    Mondzik, A.
    Kawa, A.
    Piróg, S.
    Penczek, A.
    Stala, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1817892.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    przełączalne kondensatory
    tyrystorowy przekształtnik rezonansowy
    układ podwyższający napięcie stałe
    Opis:
    This paper describes the thyristor based DC-DC step-up switched capacitors converter, taking into account the input stage. Proper divide and value selection of resonant inductances reduces the peak value of discharging current pulse in order to equalize peak value of pulses of input current of converter. This allows to design the input filter for a higher frequency, which brings gauge reduction. Mathematical analysis of models and experimental results of laboratory setup have been presented.
    Źródło:
    Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały; 2015, 71, 35; 16--28
    1733-0718
    Pojawia się w:
    Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model matematyczny wzorca dużych rezystancjiwykonanego w technice SC
    Mathematical model of high resistance standard performed in switched capacitor technology
    Autorzy:
    Tyman, Z.
    Guzik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/151652.pdf
    Data publikacji:
    2008
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    wzorzec
    duża rezystancja
    technika SC
    modulacja szerokości impulsu
    modelowanie matematyczne
    rachunek operatorowy
    standard
    high resistance
    siwtched capacitors technology
    pulse width modulation (PWM)
    mathematical model
    Laplace transform
    Opis:
    W pracy zaprezentowano model matematyczny 6-cio elementowego wzorca dużych rezystancji (zrealizowanego w technice przełączalnych pojemności SC) przeznaczonego do sprawdzania wskazań wybranych mierników do pomiarów dużych rezystancji, np. megaomomierzy. Zaletą prezentowanej idei budowy wzorca dużych rezystancji jest możliwość zmiany nastawy odtwarzanej wartości rezystancji za pomocą parametrów (częstotliwości, współczynnika wypełnienia) sygnału sterującego procesem przełączania kondensatora.
    The paper presents the mathematical model of 6 - element high resistance standard (performed in Switched Capacitor technology) used for indications checking of chosen meters intended for high resistance measurements, eg. megaohmmeters. The advantage of presented high resistance standard construction idea is the possibility of realized resistance value changes by means of signal parameters (frequency, pulse width coefficient) controlling the switching process of a capacitor.
    Źródło:
    Pomiary Automatyka Kontrola; 2008, R. 54, nr 9, 9; 646-649
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamically programmable analog arrays in acoustic frequency range signal processing
    Autorzy:
    Falkowski, P.
    Mechler, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/221037.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FPAA
    audio processing
    switched-capacitor
    analog circuits design
    Opis:
    Field programmable analog arrays (FPAA), thanks to their flexibility and reconfigurability, give the designers quite new possibilities in analog circuit design. The number of both academic projects on FPAA and applications of commercially available programmable devices is still growing. This paper explores the properties and parameters of two most popular FPAA circuits: the AnadigmVortex AN221E04 and AnadigmApex AN231E04 from the Anadigm company. The research conducted by the authors led to the discovery of some undocumented features of these devices. Several applications for audio processing were built and tested. The results show that these circuits can be used in medium-demanding audio applications. Thanks to dynamic reconfigurability, they also allow to build an universal analog audio signal processor. These circuits can also act as a versatile platform for rapid prototyping and educational purposes.
    Źródło:
    Metrology and Measurement Systems; 2011, 18, 1; 77-89
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    DC–DC boost converter with high voltage gain and a low number of switches in multisection switched capacitor topology
    Autorzy:
    Stala, R.
    Pirog, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/141210.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    DC–DC converter
    boost converter
    switched-capacitor
    high voltage pulsed power
    Opis:
    This paper presents a concept and the results of an investigation of a DC–DC boost converter with high voltage gain and a reduced number of switches. The novel concept assumes that the converter operates in a topology composed of series connection switched- capacitor-based multiplier (SCVM) sections. Furthermore, the structure of the sections has significant impact on parameters of the converter which is discussed in this paper. The paper demonstrates the basic benefit such a multisection SCVM idea in the converter, which is the significant reduction in the number of switches and diodes for high voltage gain in comparison to an SCVM converter. Aside from the number of switches and diodes, such parameters as efficiency and volume of passive components in the multisection converter are analyzed in this paper. In figures, the analysis is demonstrated using the example of 100 kW thyristor-based converters. All the characteristics of the converter are compared between various configurations of switching cells in the particular sections, thus the paper can be useful for a design approach for a high voltage gain multicell converter.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 3; 617--627
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Capacitive MEMS accelerometer with open-loop switched-capacitor readout circuit
    Autorzy:
    Szermer, M.
    Amrozik, P.
    Zając, P.
    Maj, C.
    Napieralski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/397869.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    MEMS
    ASIC
    accelerometer
    integrated circuit
    balance disorders
    akcelerometr
    układy scalone
    zaburzenia równowagi
    Opis:
    MEMS are one of the fastest developing branch in microelectronics. Many integrated sensors are widely used in smart devices i.e. smartphones, and specialized systems like medical equipment. In the paper we present the main parts of a system for measuring human movement which can be used in human balance disorder diagnosis. We describe our design of capacitive accelerometers and dedicated switched-capacitor readout circuit. Both will be manufactured as separate chips in different technological processes. The principle of operation, schematics and layouts of all parts of the system are presented. Preliminary simulations show that the proposed designs are applicable for the considered medical device.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2017, 8, 4; 139-145
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    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:
    Analog Reconfirable Circuits
    Autorzy:
    Malcher, A.
    Falkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/226956.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    analog signal processing
    configurable analog block
    CAB
    dynamic reconfiguration
    field programmable analog array
    FPAA
    switched capacitor circuits
    Opis:
    The aim of this paper is to present an overview of a new branch of analog electronics represented by analog reconfigurable circuits. The reconfiguration of analog circuits has been known and used since the beginnings of electronics, but the universal reconfigurable circuits called Field Programmable Analog Arrays (FPAA) have been developed over the last two decades. This paper presents the classification of analog circuit reconfiguration, examples of FPAA solutions obtained as academic projects and commercially available ones, as well as some application examples of the dynamic reconfiguration of FPAA.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 1; 15-26
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A solution to low power switched capacitor integrator design with reduced effective input capacitance
    Autorzy:
    Korkmaz, S.
    Dundar, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/398106.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    integrator małej mocy
    bardzo duża stała czasowa integratora
    skuteczne zmniejszenie pojemności
    włączony integrator kondensatora
    low power integrator
    very large time constant integrator
    effective capacitance reduction
    switched capacitor integrator
    Opis:
    A novel low power Switched Capacitor Integrator with reduced effective input capacitance is proposed in this paper. It is mainly based on reducing the effective input sampling capacitance by charge sharing with an extra capacitance, such that the integration capacitance can be chosen much smaller while maintaining the same sampling to integration capacitance ratio. Reducing the integration capacitance will result in less integration current and less integration current will in turn result in less power over the integrator which is the main goal of this work, reducing the integrator power consumption and chip area. Another main advantage of this configuration is, that it can be used in large time constant integrators without using physically large integration capacitance.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2010, 1, 3; 229-235
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A New 13-Level Switched-Capacitor Inverter with Reduced Device Count
    Autorzy:
    Jena, Kasinath
    Panigrahi, Chinmoy Kumar
    Gupta, Krishna Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/1956000.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    multilevel inverter
    switched capacitor
    voltage gain
    component per level factor
    cost function
    Opis:
    This paper proposed a new voltage-boosting 13-level switched-capacitor (SC) cost-effective inverter. The proposed topology comprises fourteen transistors, three capacitors and a single DC source to produce a 13-level staircase waveform. The capacitor voltage balancing problem is inherently solved by the series/parallel technique. Structural description, working principle, calculation of optimum values of capacitance and modulation scheme are briefly described. The comparative analyses with the existing SC multilevel inverter (MLI) in terms of voltage gain, blocking voltage, total standing voltage (TSV), component per level factor and cost function illustrate the merits of the proposed topology. Further, simulation and experimental results at different loading conditions verify the feasibility of the proposed topology.
    Źródło:
    Power Electronics and Drives; 2021, 6, 41; 26-41
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A multilevel switched capacitor DC-DC converter. An analysis of resonant operation conditions
    Autorzy:
    Kawa, A. H.
    Stala, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193251.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    multilevel
    DC-DC
    switched capacitor
    resonant
    converter
    boost
    step-up
    Opis:
    This paper presents the research results of a multilevel switched capacitor DC-DC converter (MLSCC). The converter, for power electronic applications, can operate in ZCS mode by utilizing resonant circuits for recharging the switched capacitors. The main focus of this article is an in-depth original analysis of the waveforms and the converter voltage ratio. The concept of the converter is verified by simulation results of the circuit in MATLAB/Simulink Sim Power Systems. The formulas given in the mathematical analysis are evaluated for example parameters of the components with the use of numerical approach in MATLAB software. Plot sets are presented in order to judge the influence of the parameters on converter performance. All non-expected relations are explained based on mathematical analysis. The possibilities of the design optimization are identified and presented based on the anticipated results. The present analysis is important for the converter design process and can be used for numerical multi-object optimization to further improve the converter design.
    Źródło:
    Power Electronics and Drives; 2016, 1, 36/2; 35-53
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A family of high-power multilevel switched capacitor-based resonant DC-DC converters – operational parameters and novel concepts of topologies
    Autorzy:
    Stala, R.
    Piróg, S.
    Penczek, A.
    Kawa, A.
    Waradzyn, Z.
    Mondzik, A.
    Skała, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/953065.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    DC-DC converter
    high power converters
    resonant converter
    high voltage gain
    zero current switching
    przetwornica DC/DC
    konwerter
    moc
    wysokie napięcie
    Opis:
    This paper presents the concept of topologies and investigation results of switched-capacitor voltage multipliers designed for application in high power systems. The analyzed family of multilevel converters includes established topologies as well as novel concepts. The application of thyristors as well as the invention of novel concepts of multiplier topologies and appropriate control make it possible to achieve high efficiency, high voltage gain, reliable and simple DC-DC converters for high power systems. Based on analytical models of the SCVMs, the paper presents a discussion of the selection of components and the efficiency of the converters as a function of converted power as well as the voltage range on the input and the output side. The results are supported by computer simulations and demonstrative experimental tests.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 5; 639-651
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A cost-effective resonant switched-capacitor DC-DC boost converter – experimental results and feasibility model
    Autorzy:
    Waradzyn, Z.
    Stala, R.
    Skała, A.
    Mondzik, A.
    Penczek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193543.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    DC-DC converter
    switched-capacitor
    voltage multiplier
    charge pump
    ZCS
    Opis:
    This paper presents the results of experimental research of a resonant switched capacitor voltage multiplier in a cost-effective topology (CESCVM) with a limited number of active switches. In the charging mode of the switched capacitors, the converter utilizes only one active switch and a required number of diodes. Therefore, the cost of the converter is decreased as compared with that of a classical SCVM converter, owing to a lower number of switches and gate driver circuits, as well as a smaller PCB area. Moreover, the CESCVM has simpler control circuits and higher reliability. This paper presents the original experimental results of the operation of the CESCVM converter. A concept of the bootstrap supply of gate drivers of the flying switches is also examined.
    Źródło:
    Power Electronics and Drives; 2018, 3, 38; 75-83
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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