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    Tytuł:
    Operation of electric hybrid drive systems in varied driving conditions
    Eksploatacja elektrycznych układów napędowych pojazdów hybrydowych w zróżnicowanych warunkach ruchu
    Autorzy:
    Pielecha, I.
    Cieślik, W.
    Szałek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1365373.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    electric motor
    current generator
    hybrid drive
    voltage boost
    energy flow
    high voltage battery
    silnik elektryczny
    generator prądu
    napęd hybrydowy
    wzmocnienie napięcia
    przepływ energii
    akumulator wysokonapięciowy
    Opis:
    Hybrid vehicles allow an increase in the powertrain efficiency thanks to their design. One such factor is the use of increased voltage supplying electric motors to the voltage supplying the high voltage battery. The battery voltage is increased several times in the inverter (boost) system to increase the final electric power supplied to the electric motor. The article presents the possibilities of using such a voltage boost in urban and non-urban driving conditions. The tests were performed on the latest generations of parallel hybrid drive systems in Lexus NX 300h and Toyota RAV4 hybrid vehicles. It has been shown that the boost system is used in about 30–40% of the urban drive distance (up to 20% of the driving time). The power supply voltage boost of the electric motors of both vehicles is used throughout the entire engine speed range of these machines at high torque values. Research has shown that the maximum voltage gain – approximately three times (up to 650 V) – is within the maximum torque range of the electric motors and allows for doubling the torque generated by the drive.
    Pojazdy z napędem hybrydowym dzięki swojej konstrukcji, pozwalają na zwiększenie sprawności układu napędowego. Jednym z takich czynników jest stosowanie zwiększonego napięcia zasilającego silniki elektryczne w stosunku do napięcia zasilającego akumulator wysokonapięciowy. Napięcie akumulatora zostaje zwiększone kilkukrotnie w układzie inwertera (boost) w celu zwiększenia końcowej mocy elektrycznej doprowadzonej do silnika elektrycznego. W artykule przedstawiono możliwości wykorzystania takiego wzmocnienia napięcia w warunkach jazdy miejskiej i pozamiejskiej. W badaniach wykorzystano najnowsze generacje układów napędu hybrydowego równoległego w pojazdach Lexus NX 300h oraz Toyota RAV4 hybrid. Wykazano, że układ wzmocnienia napięcia w warunkach miejskich wykorzystany jest w około 30–40% dystansu (do 20% czasu jazdy). Wzmocnienie napięcia zasilającego maszyny elektryczne obu pojazdów wykorzystane jest w całym zakresie prędkości obrotowej tych maszyn przy dużych wartościach momentu obrotowego. Badania wykazały, że maksymalne wzmocnienie napięcia – około trzykrotne (do wartości 650 V) – występuje w zakresie maksymalnego momentu obrotowego silników elektrycznych i pozwala na ponad 2-krotne zwiększenie generowanego momentu obrotowego układu napędowego.
    Źródło:
    Eksploatacja i Niezawodność; 2018, 20, 1; 16-23
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    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:
    Analysis of loss distribution of conventional boost, Z-source and Y-source converters for wide power and voltage range
    Autorzy:
    Gadalla, B. S.
    Schaltz, E.
    Siwakoti, Y.
    Blaabjerg, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/136154.pdf
    Data publikacji:
    2017
    Wydawca:
    EEEIC International Barbara Leonowicz Szabłowska
    Tematy:
    boost converter
    Z-source converter
    Y-source converter
    winding losses
    core losses
    gain
    thermal design
    reliability
    Opis:
    Boost converters are needed in many applications which require the output voltage to be higher than the input voltage. Recently, boost type converters have been applied for industrial applications, and hence it has become an interesting topic of research. Many researchers proposed different impedance source converters with their unique advantages as having a high voltage gain in a small range of duty cycle ratio. However, the thermal behaviour of the semiconductor devices and passive elements in the impedance source converter is an important issue from a reliability point of view and it has not been investigated yet. Therefore, this paper presents a comparison between the conventional boost, the Z-source, and the Y-source converters based on a thermal evaluation of the semiconductors. In addition, the three topologies are also compared with respect to their efficiency. In this study the results show that the boost converter has higher efficiency than the Z-source and Y-source converter for these specific voltage gain of 2 and 4. The operational principle, mathematical derivations, simulation results and final comparisons are presented in this paper.
    Źródło:
    Transactions on Environment and Electrical Engineering; 2017, 2, 1; 1-9
    2450-5730
    Pojawia się w:
    Transactions on Environment and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A dual inductor-fed boost converter with an auxiliary transformer and voltage doubler
    Autorzy:
    Dawidziuk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/201526.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    DC/DC boost converter
    current-fed
    dual inductor-fed
    auxiliary transformer
    voltage doubler
    photovoltaic systems
    Opis:
    This paper presents a dual inductor-fed boost converter with an auxiliary transformer and voltage doubler for sustainable energy power converters. The new topology integrates a two-phase boost converter and a dual inductor-fed boost converter. The energy stored and transferred by both inductors can attain a wide input-voltage and load range which uses a constant switching frequency, by controlling the time duration of the simultaneous conduction of the two switches. Among other current-fed type boost converters the presented topology is attractive due to the high voltage conversion ratio, less stress on the components and less switch conduction loss. To verify the feasibility of this topology, the principles of operation, theoretical analysis, and experimental waveforms are presented for a 1 kW prototype.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 787-791
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation studies of half-bridge isolated DC/DC boost converter
    Autorzy:
    Krupa, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/376124.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    Pspice simulation
    boost converter
    high voltage step-up
    high efficiency
    Opis:
    In order to utilize energy from low voltage power source it is necessary to use isolated DC/DC boost converter which will provide desirable input voltage step-up. To obtain a high voltage gain it is necessary to apply a magnetic device with the relevant turns ratio to the converter structure. This can be coupled inductor or transformer. The great advantage of the transformer is galvanic isolation between the subsequent power levels. Unfortunately, the high values of voltage gain is accompanied by significant currents on the primary transformer side. Large DC input currents cause an increase in power losses as the transistor conduction losses are proportional to square of current. The solution to this problem would be to divide a large input current into smaller currents through applying balancing transformers in converter structure. The input current in one stage exactly matches the current in the parallel branch, therefore there is no need for additional control to guarantee current balancing between power stages. This technique, together with the use of transistors with a small drain-source resistance and output SiC (silicon carbide) Schottky diodes enables converter to achieve necessary output voltage. This paper presents PSpice simulation results and mathematical analysis of half-bridge isolated DC/DC boost converter. In presented circuit high voltage gain and high conversion efficiency were achieved.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2014, 80; 93-100
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    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:
    Multiresonant ZVS boost converter
    Autorzy:
    Szychta, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/262727.pdf
    Data publikacji:
    2005
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Tematy:
    multiresonant converter
    zero voltage switching
    ZVS
    resonant circuits
    Opis:
    The article presents properties ofmultiresonant voltage-increasing converter to be ! applied in DC voltage supply systems. The configuration of the system elements enables application ! of the technique of zero voltage switching (ZVS) of semi-conductor elements, which yields high operating frequencies of the system while maintaining high energy efficiency and reliability of operation. Results of simulation tests of the converter, based on Simplorer, are discussed. Regulation characteristics are presented and the converter's efficiency is determined.
    Źródło:
    Electrical Power Quality and Utilisation. Journal; 2005, 11, 2; 65-71
    1896-4672
    Pojawia się w:
    Electrical Power Quality and Utilisation. Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cascaded boost converter-based high-voltage pulse generator for pulsed electric field applications
    Autorzy:
    Krishnaveni, S.
    Rajini, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1841163.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    food processing
    MOSFET
    pulsed electric field
    cascaded boost converter
    high voltage pulse
    przetwórstwo spożywcze
    pulsacyjne pole elektryczne
    kaskadowy konwerter doładowania
    impuls wysokiego napięcia
    Opis:
    Food processing technologies for food preservation have been in constant development over a few decades in order to meet current consumer’s demands. Healthy competitive improvements are observed in both thermal and non-thermal food processing technology since past two decades due to technical revolution. Among these novel technologies, pulsed electric field food processing technology has shown to be a potential non-thermal treatment capable of preserving liquid foods. The high-voltage pulse generators specifically find their applications in pulsed electric field technology. So, this paper proposes a new structure of a high-voltage pulse generator with a cascaded boost converter topology. The choice of a cascaded boost converter helps in selecting low DC input voltage and hence the size and space requirement of the high-voltage pulse generator is minimized. The proposed circuit is capable of producing high-voltage pulses with flexibility of an adjusting duty ratio and frequency. The designed circuit generates a maximum peak voltage of 1 kV in the frequency range of 7.5–20 kHz and the pulse width range of 0.8–1.8 μs. Also, the impedance matching between the cascaded boost converter and the high-voltage pulse generator is found simple without further additional components. The efficiency can be improved in the circuit by avoiding low frequency transformers.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 3; 631-641
    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:
    A novel quasi-resonant ZVS boost converter with tapped inductor
    Autorzy:
    Dawidziuk, Jakub
    Harasimczuk, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/2173568.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    tapped inductor
    boost converter
    DC/DC converter
    zero voltage switching
    induktor gwintowany
    wzmacniacz
    przetwornica DC/DC
    przełączanie przy zerowym napięciu
    Opis:
    The purpose of this paper is to propose a model of a novel quasi-resonant boost converter with a tapped inductor. This converter combines the advantages of zero voltage quasi-resonant techniques and different conduction modes with the possibility of obtaining a high voltage conversion ratio by using a tapped inductor, which results in high converter efficiency and soft switching in the whole output power range. The paper contains an analysis of converter operation, a determination of voltage conversion ratio and the maximum voltage across power semiconductor switches as well as a discussion of control methods in discontinuous, critical, and continuous conduction modes. In order to verify the novelty of the proposed converter, a laboratory prototype of 300 W power was built. The highest efficiency η = 94.7% was measured with the output power Po = 260 W and the input voltage Vin = 50 V. The lowest efficiency of 90.7% was obtained for the input voltage Vin = 30 V and the output power Po = 75 W. The model was tested at input voltages (30–50) V, output voltage 380 V and maximum switching frequency 100 kHz.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136043
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel quasi-resonant ZVS boost converter with tapped inductor
    Autorzy:
    Dawidziuk, Jakub
    Harasimczuk, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/2090704.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    tapped inductor
    boost converter
    DC/DC converter
    zero voltage switching
    induktor gwintowany
    wzmacniacz
    przetwornica DC/DC
    przełączanie przy zerowym napięciu
    Opis:
    The purpose of this paper is to propose a model of a novel quasi-resonant boost converter with a tapped inductor. This converter combines the advantages of zero voltage quasi-resonant techniques and different conduction modes with the possibility of obtaining a high voltage conversion ratio by using a tapped inductor, which results in high converter efficiency and soft switching in the whole output power range. The paper contains an analysis of converter operation, a determination of voltage conversion ratio and the maximum voltage across power semiconductor switches as well as a discussion of control methods in discontinuous, critical, and continuous conduction modes. In order to verify the novelty of the proposed converter, a laboratory prototype of 300 W power was built. The highest efficiency η = 94.7% was measured with the output power Po = 260 W and the input voltage Vin = 50 V. The lowest efficiency of 90.7% was obtained for the input voltage Vin = 30 V and the output power Po = 75 W. The model was tested at input voltages (30–50) V, output voltage 380 V and maximum switching frequency 100 kHz.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; e136043, 1--11
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    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:
    Modeling of boost DC/DC pulse converter with regard of conduction power losses for continuous current mode
    Modelowanie przetwornicy DC/DC podwyższającej napięcie z uwzględnieniem strat mocy przewodzenia przy ciągłym prądzie łącznika diodowego
    Autorzy:
    Pawlak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/402456.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
    Tematy:
    switching mode power converter
    boost converter
    energy efficiency
    voltage gain
    tryb przełączania przetwornicy
    konwerter mocy
    efektywność energetyczna
    wzmocnienie napięcia
    Opis:
    Boost DC/DC pulse converter structure with regard to conduction power losses for Continuous Current Mode has been analyzed in the paper. Simplified model of converter which takes into account the nonlinearity of the static characteristic switches was usedfor theoretical analysis. The models of the transistor and diode whose static characteristic are modeled as in series connection ideal electronic switch, the constant voltage source and dynamic effective resistance have been used. The dynamic losses of powers occurring in the switching process of electronic switches were not captured in the work. The proposed model of the converter has the use in the case, when it works at low switching frequencies, when the losses of switching are considerably smaller than the losses of conductivity. This land of model is useful, particularly in the case of the converter supplied the low voltage, when the voltages loss on electronic switches is significant. Analysis was performed for Continuous Current Mode (CCM) with voltage step up. Results of theoretical analysis have been presented and were verified by simulation. TCAD circuit simulator was used for simulation. Simulations confirm results of theoretical analysis.
    Źródło:
    Structure and Environment; 2012, 4, 2; 27-35
    2081-1500
    Pojawia się w:
    Structure and Environment
    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
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