Design of a Simple Inductor-less AC-AC Converter Realizing High Input Power Factor

Kei Eguchi; Wanglok Do; Kanji Abe; Krit Smerpitak   and Sawai Pongswatd

doi:10.17485/ijst/2017/v10i4/110902

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Design of a Simple Inductor-less AC-AC Converter Realizing High Input Power Factor

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Indian Journal of Science and Technology

DOI: 10.17485/ijst/2017/v10i4/110902

Year: 2017, Volume: 10, Issue: 4, Pages: 1-6

Original Article

Design of a Simple Inductor-less AC-AC Converter Realizing High Input Power Factor

Kei Eguchi¹ , Wanglok Do¹, Kanji Abe¹ , Krit Smerpitak² and Sawai Pongswatd²

¹Department of Information Electronics, Fukuoka Institute of Technology, Japan; [email protected]; [email protected]; [email protected] ²Faculty of Engineering, King Mongkut’s Institute of Technology, Ladkrabang, Thailand; [email protected]; [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Switched capacitor (SC) techniques is used in order to design a simple inductor-less ac-ac converter with small size and high input power factor. Comparing conventional inductor-less ac-ac converters with the proposed converter, an input/ output (I/O) terminal is connected alternately to one of capacitors to achieve ac-ac conversion. To realize the new topology, the new designed converter is composed of two capacitors and four switches in the conversion ratios of 2 and 1/2. For this reason, as well as high input power factor, the proposed converter can achieve small size. To explain how the proposed converter is operated with the conversion ratios of 2 and 1/2, operation’s law, analysis in theory, and results of circuit simulation are written on this paper. The validity of the proposed converter is confirmed by circuit simulations using SPICE simulator.

Keywords: Direct AC-AC Converters, Power Converters, Switched Capacitor Techniques, Switching Mode Power Supply