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Adam Kawa
Department of Power Electronics and Energy Control Systems, Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland

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Journal article
Published: 13 May 2020 in Energies
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This paper presents the research results of the bidirectional multilevel resonant switched capacitor converter (MRSCC). The converter can achieve a high voltage ratio in multilevel topology, which limits the voltage stress on switches and is able to operate with high power efficiency. The converter can be applied as an interconnector between DC voltage systems used for various applications. This paper presents a method that significantly improves the efficiency of the MSRCC through topology modification. Furthermore, the feasibility of the converter was demonstrated with the use of SiC and Si MOSFET switches, together with suitable passive components. It was demonstrated that the proposed modification of the topology makes the converter very efficient in SiC-based ones and can significantly improve the efficiency of Si MOSFET converters. The series of test results of the SiC-based converter is a novel aspect presented in this paper and shows promising achievements of efficiency. The results were obtained from the laboratory setup of 5 kW and 0.5/2 kV MRSCC. To demonstrate the bidirectional operation of the converter, a back-to-back setup (0.5/2/0.5 kV) was used. It also demonstrates that such a high-voltage gain converter can be accurately tested with the use of laboratory equipment with a typical voltage range.

ACS Style

Adam Kawa; Robert Stala. SiC-Based Bidirectional Multilevel High-Voltage Gain Switched-Capacitor Resonant Converter with Improved Efficiency. Energies 2020, 13, 2445 .

AMA Style

Adam Kawa, Robert Stala. SiC-Based Bidirectional Multilevel High-Voltage Gain Switched-Capacitor Resonant Converter with Improved Efficiency. Energies. 2020; 13 (10):2445.

Chicago/Turabian Style

Adam Kawa; Robert Stala. 2020. "SiC-Based Bidirectional Multilevel High-Voltage Gain Switched-Capacitor Resonant Converter with Improved Efficiency." Energies 13, no. 10: 2445.

Journal article
Published: 01 October 2017 in Bulletin of the Polish Academy of Sciences Technical Sciences
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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.

ACS Style

R. Stala; Stanislaw Pirog; A. Penczek; Adam Kawa; Z. Waradzyn; A. Mondzik; A. Skała. A family of high-power multilevel switched capacitor-based resonant DC-DC converters – operational parameters and novel concepts of topologies. Bulletin of the Polish Academy of Sciences Technical Sciences 2017, 65, 639 -651.

AMA Style

R. Stala, Stanislaw Pirog, A. Penczek, Adam Kawa, Z. Waradzyn, A. Mondzik, A. Skała. A family of high-power multilevel switched capacitor-based resonant DC-DC converters – operational parameters and novel concepts of topologies. Bulletin of the Polish Academy of Sciences Technical Sciences. 2017; 65 (5):639-651.

Chicago/Turabian Style

R. Stala; Stanislaw Pirog; A. Penczek; Adam Kawa; Z. Waradzyn; A. Mondzik; A. Skała. 2017. "A family of high-power multilevel switched capacitor-based resonant DC-DC converters – operational parameters and novel concepts of topologies." Bulletin of the Polish Academy of Sciences Technical Sciences 65, no. 5: 639-651.

Journal article
Published: 05 September 2017 in PRZEGLĄD ELEKTROTECHNICZNY
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Wydawnictwo SIGMA-NOT wydaje czasopisma fachowe informuj

ACS Style

Adam Kawa. The Multilevel Switched Capacitor Power Converter. Experimental Proof of Concept. PRZEGLĄD ELEKTROTECHNICZNY 2017, 1, 18 -21.

AMA Style

Adam Kawa. The Multilevel Switched Capacitor Power Converter. Experimental Proof of Concept. PRZEGLĄD ELEKTROTECHNICZNY. 2017; 1 (9):18-21.

Chicago/Turabian Style

Adam Kawa. 2017. "The Multilevel Switched Capacitor Power Converter. Experimental Proof of Concept." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 9: 18-21.

Conference paper
Published: 01 September 2017 in 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)
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ACS Style

Adam Kawa; Robert Stala. Bidirectional multilevel switched-capacitor resonant converter based on SiC MOSFET switches. 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe) 2017, 1 .

AMA Style

Adam Kawa, Robert Stala. Bidirectional multilevel switched-capacitor resonant converter based on SiC MOSFET switches. 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe). 2017; ():1.

Chicago/Turabian Style

Adam Kawa; Robert Stala. 2017. "Bidirectional multilevel switched-capacitor resonant converter based on SiC MOSFET switches." 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe) , no. : 1.

Journal article
Published: 01 September 2016 in Archives of Electrical Engineering
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The paper presents investigation results of the natural balancing phenomena in the flying-capacitor SEPIC converters. The SEPIC converters topologies can be reconfigured to the flying-capacitor topology. Owing to this modification the advantageous increase of frequency of the current in the chokes and the decrease of semiconductors voltages can be achieved which is shown in this paper. Similarly to other multilevel flying capacitor topologies the adequate voltage sharing of the flying capacitors is an important issue for safe operation of the converter. The paper focuses on the analysis of the flying capacitor voltages balancing in the converter by natural currents as well as by the application of the additional RLC balancing booster. The paper proves that the natural balancing can be achieved by the specific application of the balancing circuit in the flying-capacitor SEPIC topology and proves the specific differences in the balancing process by natural currents of converter and with the usage of the balancing circuit. An operation of the converter with the balancing circuit and the natural balancing ability is studied here.

ACS Style

Adam Kawa; Robert Stala. The flying-capacitor SEPIC converter with the balancing circuit. Archives of Electrical Engineering 2016, 65, 411 -424.

AMA Style

Adam Kawa, Robert Stala. The flying-capacitor SEPIC converter with the balancing circuit. Archives of Electrical Engineering. 2016; 65 (3):411-424.

Chicago/Turabian Style

Adam Kawa; Robert Stala. 2016. "The flying-capacitor SEPIC converter with the balancing circuit." Archives of Electrical Engineering 65, no. 3: 411-424.

Journal article
Published: 05 June 2016 in PRZEGLĄD ELEKTROTECHNICZNY
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ACS Style

Adam Kawa. Metoda wyznaczania w czasie rzeczywistym optymalnej częstotliwości impulsowania tyrystorowego, rezonansowego przekształtnika DC-DC o przełączanych kondensatorach. PRZEGLĄD ELEKTROTECHNICZNY 2016, 1, 27 -33.

AMA Style

Adam Kawa. Metoda wyznaczania w czasie rzeczywistym optymalnej częstotliwości impulsowania tyrystorowego, rezonansowego przekształtnika DC-DC o przełączanych kondensatorach. PRZEGLĄD ELEKTROTECHNICZNY. 2016; 1 (6):27-33.

Chicago/Turabian Style

Adam Kawa. 2016. "Metoda wyznaczania w czasie rzeczywistym optymalnej częstotliwości impulsowania tyrystorowego, rezonansowego przekształtnika DC-DC o przełączanych kondensatorach." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 6: 27-33.

Journal article
Published: 04 December 2015 in IEEE Transactions on Power Electronics
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This paper presents concepts and results of an investigation of power electronic thyristor-based switched-capacitor voltage multipliers (SCVMs). A concept of the SCVM power converters assumes the utilization of resonant circuits for the zero-current switching operation. The topology makes it possible to apply thyristors as active switches that create the possibility of composing the resonant switch-mode converters for high-voltage gain, high power, and low cost, and opens a huge area of applications. This paper presents an in-depth analysis of the SCVM configured as the resonant high-power thyristor-based converter. The operation with regard to the specific switching conditions of thyristors, as well as efficiency of the converter is analyzed providing the unique relationship important for the converter design, optimization, and efficiency improvement. An experimental validation confirms the feasibility and the operation concept of the SCVM and demonstrates the efficiency range. The SCVM converter can be optimized to the topology with a decreased number of switches. This paper also presents a novel topology of the resonant converter with a reduced number of switches, resonant switched capacitor voltage multiplier (RSCVM), dedicated for thyristor implementation. The RSCVM requires the specific component selection and control. The analysis of the configuration, operation, efficiency, and component selection of the RSCVM converter, as well as simulation and experimental results are presented.

ACS Style

Adam Kawa; Robert Stala; Andrzej Mondzik; Stanislaw Pirog; Adam Penczek. High Power Thyristor-Based DC-DC Switched-Capacitor Voltage Multipliers. Basic Concept And Novel Derived Topology with A Reduced Number of Switches. IEEE Transactions on Power Electronics 2015, 31, 1 -1.

AMA Style

Adam Kawa, Robert Stala, Andrzej Mondzik, Stanislaw Pirog, Adam Penczek. High Power Thyristor-Based DC-DC Switched-Capacitor Voltage Multipliers. Basic Concept And Novel Derived Topology with A Reduced Number of Switches. IEEE Transactions on Power Electronics. 2015; 31 (10):1-1.

Chicago/Turabian Style

Adam Kawa; Robert Stala; Andrzej Mondzik; Stanislaw Pirog; Adam Penczek. 2015. "High Power Thyristor-Based DC-DC Switched-Capacitor Voltage Multipliers. Basic Concept And Novel Derived Topology with A Reduced Number of Switches." IEEE Transactions on Power Electronics 31, no. 10: 1-1.

Journal article
Published: 01 September 2014 in Archives of Electrical Engineering
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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)

ACS Style

Adam Kawa; Adam Penczek; Stanisław Piróg. DC-DC boost-flyback converter functioning as input stage for one phase low power grid-connected inverter. Archives of Electrical Engineering 2014, 63, 393 -407.

AMA Style

Adam Kawa, Adam Penczek, Stanisław Piróg. DC-DC boost-flyback converter functioning as input stage for one phase low power grid-connected inverter. Archives of Electrical Engineering. 2014; 63 (3):393-407.

Chicago/Turabian Style

Adam Kawa; Adam Penczek; Stanisław Piróg. 2014. "DC-DC boost-flyback converter functioning as input stage for one phase low power grid-connected inverter." Archives of Electrical Engineering 63, no. 3: 393-407.