A modified two-level three-phase quasi-soft-switching inverter

Liu, Yusheng; Wu, Weimin; Blaabjerg, Frede; Chung, Henry Shu-Hung

doi:10.1109/apec.2014.6803319

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…Układy łagodnego przełączania stosowane w trójfazowych, dwupoziomowych falownikach napięcia można podzielić na dwie grupy. Pierwsza z nich obejmuje przypadki, w których falownik zawiera jeden układ łagodnego przełączania dla wszystkich tranzystorów falownika [4][5][6][7][8][9][10][11][12][13][14][15][16]. Mankamentem tych układów jest możliwość łagodnego przełączania tranzystorów w stosunkowo wąskim zakresie zmian częstotliwości.…”

Section: łAgodne Przełączanie Tranzystorów W Trójfazowych Falownikachunclassified

Trójfazowy dwupoziomowy falownik napięcia z łagodnym przełączaniem tranzystorów odpornym na zakłócenia sterowania

Mazgaj¹,

Rozegnał²,

Szular³

2016

ELECTROTECHNICAL REVIEW

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Trójfazowy dwupoziomowy falownik napięcia z łagodnym przełączaniem tranzystorów odpornym na zakłócenia sterowania Streszczenie. Łagodne przełączanie tranzystorów w falownikach napięcia wymaga najczęściej stosowania kondensatorów i dławików indukcyjnych. W proponowanym układzie łagodnego przełączania, w odróżnieniu od istniejących rozwiązań, nie występuje niebezpieczeństwo udarowego rozładowania kondensatora przez tranzystor główny falownika oraz nie ma ryzyka przerwania prądu dławika, co grozi uszkodzeniem tranzystorów. Przedstawiono zasady pracy układu, wytyczne doboru elementów oraz wyniki badań laboratoryjnych.

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Section: łAgodne Przełączanie Tranzystorów W Trójfazowych Falownikachunclassified

Trójfazowy dwupoziomowy falownik napięcia z łagodnym przełączaniem tranzystorów odpornym na zakłócenia sterowania

Mazgaj¹,

Rozegnał²,

Szular³

2016

ELECTROTECHNICAL REVIEW

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“…Generally, the active soft-switching circuits can achieve ZVS or ZCS of all switches [10], [12]- [17]. But they usually require extra auxiliary switches and passive components, so their circuits and control are more complex, which is detrimental for modularity.…”

Section: Introductionmentioning

confidence: 99%

A Passive Soft-Switching Snubber With Energy Active Recovery Circuit for PWM Inverters

et al. 2020

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A passive soft-switching snubber with energy active recovery circuit (PSS-EARC) for pulse width modulation (PWM) inverters is proposed in this paper. The PSS-EARC recovers the buffering energy of the snubber inductors and capacitors back to the input voltage source while achieving passive softswitching, so as to improve the inverter efficiency. In this paper, the configuration and operation principle of the PSS-EARC are analyzed and studied in detail firstly. Comparing with the traditional energy passive recovery circuit, the PSS-EARC avoids the circulating current issue by employing the auxiliary switches. Because the control of auxiliary switches is simple and independent, it is also benefit to the integration of auxiliary circuits. Moreover, in three-phase inverter application, the EARC is shared by three bridge-legs, which may further simplify the circuit. Finally, a 10kW three-phase inverter with the PSS-EARC is built. The experimental results demonstrate the validity and superiority of the proposed circuit. INDEX TERMS Energy active recovery, inverter, passive soft-switching, switching loss.

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“…A lot of soft switching solutions are described in scientific literature. Generally, these systems can be divided into two groups; the first one includes VSIs with one central auxiliary soft switching circuit [7][8][9][10][11][12] and the second group refers to the inverters with individual auxiliary soft switching circuit in each phase of the given inverter [13][14][15][16][17][18][19]. The majority advantages of the first group are small number of additional elements of the given soft switching circuit, and in result simple structure.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 2 presents, for example, one of the most often soft switching system presented in literature [13,16]. In the majority of the existing soft switching systems, the auxiliary circuits consist of capacitors connected in parallel to the main transistors [8,10,20] and resonant coils which are connected in series to auxiliary transistors [7,9,10,13,16]. These connections are not recommended because the main or auxiliary transistor can be damaged during disturbances in control systems.…”

Section: Introductionmentioning

confidence: 99%

Modifications of the soft switching system resistant to disturbances in control systems of voltage sources inverters

2018

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Reduction of the switching losses in three-phase voltage source inverters can be achieved by using of soft switching systems that not only increase the efficiency of the inverters, but they also reduce the size of the semiconductor cooling circuits, that is especially important in traction vehicles. The majority of existing soft switching systems have some drawbacks that could be danger for inverter operation in the case of disturbances in control systems. The paper briefly describes the structure, operation principles and results of laboratory tests of the proposed soft switching system. Particular attention has been paid to the specific features of alternative versions of the proposed soft switching system, that allow to improve operating parameters of the basic system.

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A modified two-level three-phase quasi-soft-switching inverter

Cited by 5 publications

References 17 publications

Trójfazowy dwupoziomowy falownik napięcia z łagodnym przełączaniem tranzystorów odpornym na zakłócenia sterowania

Trójfazowy dwupoziomowy falownik napięcia z łagodnym przełączaniem tranzystorów odpornym na zakłócenia sterowania

A Passive Soft-Switching Snubber With Energy Active Recovery Circuit for PWM Inverters

Modifications of the soft switching system resistant to disturbances in control systems of voltage sources inverters

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