Temat: flying capacitor - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: The flying-capacitor SEPIC converter with the balancing circuit
Autorzy:: Kawa, A.
Stala, R.
Tematy:: SEPIC converter
natural balancing
flying-capacitor; Pokaż więcej
Data publikacji:: 2016
Powiązania:: https://bibliotekanauki.pl/articles/141719.pdf Link otwiera się w nowym oknie
Źródło:: Archives of Electrical Engineering; 2016, 65, 3; 411-424
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Opis:: 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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of Transients in a Three-Level DC–DC Flying Capacitor Converter. Time Domain Approach
Autorzy:: Reznikov, Boris
Ruderman, Alexander
Galanina, Valentina
Tematy:: three-level DC–DC converter
flying capacitor
transient
natural balancing; Pokaż więcej
Data publikacji:: 2019
Powiązania:: https://bibliotekanauki.pl/articles/1193695.pdf Link otwiera się w nowym oknie
Źródło:: Power Electronics and Drives; 2019, 4, 39; 33-45
2451-0262
2543-4292
Pojawia się w:: Power Electronics and Drives
Opis:: The paper considers a discrete state-space model for transients in a three-level flying capacitor DC–DC converter. A transition matrix is obtained for a pulse width modulation (PWM) period. The matrix elements are expanded into a power series using a selected small parameter. The matrix eigenvalues that determine the natural balancing dynamics transients are presented in the form of power series as well. Four separate transients are constructed based on four possible PWM period initial states (topologies). Inductor current and capacitor voltage transients are found for the voltage source power-up as the arithmetic average of the four separate transients. The discrete solutions are replaced by continuous ones. The resulting transients that are elementary functions of the circuit parameters, PWM period, and voltage reference demonstrate good agreement with the simulation results.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analysis of Transients in a 4-Level Flying Capacitor Converter: Time Domain Approach. Part 2: Small Normalised Voltage Command
Autorzy:: Reznikov, Boris
Ruderman, Alex
Galanina, Valentina
Tematy:: 4-level DC–DC converter
flying capacitor
natural balancing
transients; Pokaż więcej
Data publikacji:: 2020
Powiązania:: https://bibliotekanauki.pl/articles/1193863.pdf Link otwiera się w nowym oknie
Źródło:: Power Electronics and Drives; 2020, 5, 40; 41-57
2451-0262
2543-4292
Pojawia się w:: Power Electronics and Drives
Opis:: A 4-level flying capacitor converter (FCC) operation is considered on a base of discrete state-space model. A transition matrix is obtained for a pulse width modulation (PWM) period for small normalised voltage command values [0, 1/3]. The transition matrix elements are expanded into power series by small parameters. The matrix eigenvalues are presented in the form of power series as well. Six separate transients are constructed for six possible initial FCC states on a PWM period. Inductor current and capacitors’ voltage transients are found for the voltage source power-up as the arithmetic average of the six separate transients. Finally, the discrete solutions are replaced by equivalent continuous ones. Simple and accurate formulas for inductor current and capacitors’ voltage transients demonstrate good agreement with simulation results.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Analysis of Transients in a 4-Level Flying Capacitor Converter: Time Domain Approach. Part 1: Large Normalised Voltage Command
Autorzy:: Reznikov, Boris
Ruderman, Alex
Galanina, Valentina
Tematy:: 4-level DC-DC converter
flying capacitor
natural balancing
transients; Pokaż więcej
Data publikacji:: 2020
Powiązania:: https://bibliotekanauki.pl/articles/1193906.pdf Link otwiera się w nowym oknie
Źródło:: Power Electronics and Drives; 2020, 5, 40; 27-40
2451-0262
2543-4292
Pojawia się w:: Power Electronics and Drives
Opis:: A 4-level flying capacitor converter (FCC) operation is considered on a base of discrete state-space model. A transition matrix is obtained for a pulse width modulation (PWM) period for large normalised voltage command values [1/3, 1). The transition matrix elements are expanded into power series by small parameters. The matrix eigenvalues are presented in the form of power series as well. Six separate transients are constructed for six possible initial FCC states on a PWM period. Inductor current and capacitors’ voltage transients are found for the voltage source power-up as the arithmetic average of the six separate transients. Finally, the discrete solutions are replaced by equivalent continuous ones. Simple and accurate formulas for inductor current and capacitors’ voltage transients demonstrate good agreement with simulation results.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Natural capacitor voltage balance in multilevel flying capacitor converters. A review of research achievements
Autorzy:: Stala, R.
Tematy:: flying capacitor converter
natural capacitor voltage balance
multilevel converter
inverter
DC-DC converter; Pokaż więcej
Data publikacji:: 2016
Powiązania:: https://bibliotekanauki.pl/articles/1193250.pdf Link otwiera się w nowym oknie
Źródło:: Power Electronics and Drives; 2016, 1, 36/2; 5-33
2451-0262
2543-4292
Pojawia się w:: Power Electronics and Drives
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.
Dostawca treści:: Biblioteka Nauki

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