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A step-down nesting-type ac–ac converter combined with voltage equalizers and switched-capacitor simple converters

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Veröffentlicht in: Energy reports 6(2020), 2 vom: Feb., Seite 173-178
Personen und Körperschaften: Eguchi, Kei (VerfasserIn), Rubpongse, Ratanaubol (VerfasserIn), Shibata, Akira (VerfasserIn), Ishibashi, Takaaki (VerfasserIn), Asadi, Farzin (VerfasserIn)
Titel: A step-down nesting-type ac–ac converter combined with voltage equalizers and switched-capacitor simple converters/ Kei Eguchi, Ratanaubol Rubpongse, Akira Shibata, Takaaki Ishibashi, Farzin Asadi
Format: E-Book-Kapitel
Sprache: Englisch
veröffentlicht:
2020
Gesamtaufnahme: : Energy reports, 6(2020), 2 vom: Feb., Seite 173-178
, volume:6
Schlagwörter:
Aufsatz in Zeitschrift
Kongressbeitrag
Quelle: Verbunddaten SWB
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Zusammenfassung: In this paper, we present an inductor-less direct ac-ac converter with improved nesting-type topology. Unlike existing direct ac-ac converters, the proposed ac-ac converter combines a voltage equalizer and a switched-capacitor (SC) simple converter. Owing to the nesting conversion using two techniques, the proposed converter can provide a stepped-down voltage with small number of circuit components and high input power factor. To evaluate the performance of the proposed ac-ac converter, we compared the proposed ac-ac converter with existing inductor-less ac-ac converters, namely, flying capacitor type converter, symmetrical type converter, and traditional nesting-type converter, by theoretical analysis and simulation program with integrated circuit emphasis (SPICE) simulations. The SPICE simulations demonstrate that the proposed ac-ac converter outperforms existing inductor-less ac-ac converters in the point of circuit size and input power factor, although the power efficiency of the proposed ac-ac converter is inferior to that of the symmetrical type converter. In the case of 1/4× voltage gain, the proposed ac-ac converter achieves about 82% power efficiency and 0.58 input power factor when the output power is 200 W.
ISSN: 2352-4847
DOI: 10.1016/j.egyr.2019.11.059
Zugang: Open Access