Design of an Inductor-less Step-Down AC/AC Converter Combined with a Symmetrical-Type Converter and Ladder-Type Converters
3rd International Conference on Power and Energy Applications, ICPEA 2020, Virtual, Busan, Güney Kore, 9 - 11 Ekim 2020, ss.89-93, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Doi Numarası: 10.1109/icpea49807.2020.9280136
- Basıldığı Şehir: Virtual, Busan
- Basıldığı Ülke: Güney Kore
- Sayfa Sayıları: ss.89-93
- Anahtar Kelimeler: ac/ac converters, autotransformers, inductor-less converters, nested topology, switched capacitor circuits
- Maltepe Üniversitesi Adresli: Evet
Özet
In this paper, a new inductor-less step-down ac/ac converter is designed by using switched-capacitor (SC) techniques. Unlike existing inductor-less ac/ac converters, the proposed ac/ac converter consists of ladder-type converters nested in a symmetrical-type converter. In the proposed ac/ac converter, the $1/4\times$ voltage gain is achieved by converting an ac input twice by the symmetrical-type converter and the ladder-type converters. The proposed new topology enables to reach not only high power efficiency but also high input power factor. To evaluate the characteristics of the proposed ac/ac inverter realizing the $1/4\times$ voltage gain, we conducted theoretical analysis and simulation program with integrated circuit emphasis (SPICE) simulations. The SPICE simulation results demonstrated that the proposed ac/ac converter can achieve about 84% power efficiency and 0.88 input power factor when the output power is 200W.