Wyniki wyszukiwania - BazTech

1

Implementacja uproszczonego modelu strat dławika przetwornicy impulsowej w programie GeckoCIRCUITS

Gzieł Damian

Elektronika : konstrukcje, technologie, zastosowania

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2022

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Vol. 63, Nr 8

36--40

PL

W pracy zaprezentowano wybrane możliwości programu GeckoCIRSCUITS w zakresie symulacji układów energoelektronicznych ze szczególnym uwzględnieniem modelowania strat elementów magnetycznych. Omówiono podstawowe zagadnienia dotyczące przygotowania danych wejściowych potrzebnych do symulacji. Następnie szczegółowo przedstawiono sposób implementacji modelu strat rdzenia iGSE oraz uproszczonego modelu strat w uzwojeniu dławika. Przeprowadzono symulacje pracy dławika w przetwornicy impulsowej obniżającej napięcie (buck) oraz poddano dyskusji wyniki i przydatność użytych modeli.

EN

The paper presents selected possibilities of the GeckoCIRSCUITS program in the field of simulation of power electronics systems, with particular emphasis on modeling losses of magnetic elements. The basic issues related to the preparation of the input data necessary for the simulation are discussed. Then, the implementation of the iGSE core loss model and the simplified choke winding loss model are presented in detail. The choke operation simulations in the switched-mode power supply (buck) were carried out, and the results and usefulness of the models used were discussed.

2

Analysis of loss distribution of conventional boost, Z-source and Y-source converters for wide power and voltage range

Gadalla B. S., Schaltz E., Siwakoti Y., Blaabjerg F.

Transactions on Environment and Electrical Engineering

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2017

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Vol. 2, No. 1

1--9

EN

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.

3

Analytical description of power losses in a transformer operating in the dual active bridge converter

Barlik R., Nowak M., Grzejszczak P., Zdanowski M.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2016

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Vol. 64, nr 3

561--574

EN

The paper presents an analytical approach to the determination of power losses in a high-frequency transformer operating in the dual active bridge (DAB). This transformer, having two single-phase transistor bridge inverters, couples two DC circuits that significantly differ in voltages (280 V and 51 V ±20%). Power losses in the core and windings of the planar transformer 5600 VA /100 kHz were calculated taking into account changes in the value and direction of the energy flow between the coupled DC circuits. These circuits represent storage or renewable energy sources and intermediate circuits of the converters used in distributed generation systems. Calculations were performed using the Steinmetz’s and Dowell’s equations. The analytical results have been verified experimentally.

4

Thermal analytical winding size optimization for different conductor shapes

Wojda R. P.

Archives of Electrical Engineering

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2015

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Vol. 64, nr 2

197--214

EN

The aim of this paper is to derive an analytical equations for the temperature dependent optimum winding size of inductors conducting high frequency ac sinusoidal currents. Derived analytical equations are useful designing tool for research and development engineers because windings made of foil, square-wire, and solid-round-wire windings are considered. Temperature dependent Dowell’s equation for the ac-to-dc winding resistance ratio is given and approximated. Thermally dependent analytical equations for the optimum foil thickness, as well as valley thickness and diameter of the square-wire and solid-round-wire windings are derived from approximated thermally dependent ac-to-dc winding resistance ratios. Minimum winding ac resistance of the foil winding and local minimum of the winding ac resistance of the solid-round-wire winding are verified with Maxwell 3D Finite Element Method simulations.

5

Effect of switching frequency on winding losses in buck - type dc - dc converter

Garbiec T.

Zeszyty Naukowe. Elektryka / Politechnika Opolska

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2010

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z. 63

15-16

EN

The paper presents an analysis of influence of operation frequency on losses in a winding of a choke inductor in DC - DC step - down switched mode converter. A field - circuit finite element model of the converter is used to compute winding losses of an inductor.