Special Issue "Design and Optimization of High-Frequency Power Converter"

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: 30 June 2020.

Special Issue Editor

Prof. Dr. Woo-Young Choi
E-Mail Website
Guest Editor
Division of Electronic Engineering, Chonbuk National University, Jeonju 561-756, Korea
Interests: switching power converters; control and modulation strategies; high-frequency power conversion; high-frequency switching circuits; wide band-gap power semiconductors

Special Issue Information

Dear Colleagues,

High-frequency power converters are switching power converters that use high-frequency switching techniques. One of advantages this provides is improved power density, which reduces the system size. This has been applied to recent industrial applications such as solar microinverters, server power supplies, and electric vehicle chargers. At the same time, the use of wide band-gap devices, such as SiC and GaN, creates new challenges for the compact design of high-frequency power converters. With the development of advanced devices, many technical aspects require deep investigation to optimize the design of high-frequency power converters.

This Special Issue focuses on the design and optimization of high-frequency power converters. The topics of interest include, but are not limited to:

  • Topology, control, and modulation of high-frequency power converters;
  • High-frequency switching techniques (resonant switching, switched capacitor);
  • High-frequency switching circuits (magnetic design, gate driving circuit);
  • Circuit count reduction design of high-frequency power converters;
  • Application of wide band-gap devices in high-frequency power conversion;
  • Layout and design techniques for high-frequency power converters;
  • Industrial applications of high-frequency power converters.

Prof. Dr. Woo-Young Choi
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Electronics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (2 papers)

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Research

Open AccessFeature PaperArticle
Soft-Switching Bidirectional Three-Level DC–DC Converter with Simple Auxiliary Circuit
Electronics 2019, 8(9), 983; https://doi.org/10.3390/electronics8090983 - 03 Sep 2019
Abstract
This paper suggests a soft-switching bidirectional three-level DC–DC converter with a simple auxiliary circuit. The proposed converter uses auxiliary LC resonant circuits so that the power switches operate under a soft-switching condition. The resonant operation of the LC circuits makes power switches turn [...] Read more.
This paper suggests a soft-switching bidirectional three-level DC–DC converter with a simple auxiliary circuit. The proposed converter uses auxiliary LC resonant circuits so that the power switches operate under a soft-switching condition. The resonant operation of the LC circuits makes power switches turn on at zero voltage, eliminating the turn-on switching power losses. The proposed converter improves the power efficiency, not using complex power switching circuits, but using simple LC resonant circuits. The operation of the proposed converter is described according to its operation modes. Experimental results for a 1.0 kW prototype are discussed to verify its performance. The proposed converter achieved the power efficiencies of 97.7% in the step-up mode and 97.8% in the step-down mode, respectively, for the rated load condition. Full article
(This article belongs to the Special Issue Design and Optimization of High-Frequency Power Converter)
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Open AccessFeature PaperArticle
Power Efficiency Improvement of Three-Phase Split-Output Inverter Using Magnetically Coupled Inductor Switching
Electronics 2019, 8(9), 969; https://doi.org/10.3390/electronics8090969 - 30 Aug 2019
Abstract
The conventional three-phase split-output inverter (SOI) has been used for grid-connected applications because it does not require dead time and has no shoot-through problems. Recently, the conventional inverter uses the silicon carbide (SiC) schottky diodes for the freewheeling diodes because of its no [...] Read more.
The conventional three-phase split-output inverter (SOI) has been used for grid-connected applications because it does not require dead time and has no shoot-through problems. Recently, the conventional inverter uses the silicon carbide (SiC) schottky diodes for the freewheeling diodes because of its no reverse-recovery problem. Nevertheless, in a practical design, the SiC schottky diodes suffer from current overshoots and voltage oscillations. These overshoots and oscillations result in switching-power losses, decreasing the power efficiency of the inverter. To alleviate this drawback, we present a three-phase SOI using magnetically coupled inductor switching technique. The magnetically coupled inductor switching technique uses one auxiliary diode and coupled inductor for each switching leg in the three-phase SOI. By the operation of the coupled inductor, the main diode current is shifted to the auxiliary diode without the reverse-recovery process. The proposed inverter reduces switching-power losses by alleviating current overshoots and voltage oscillations of SiC schottky diodes. It achieves higher power efficiency than the conventional inverter. We discuss experimental results for a 1.0 kW prototype inverter to verify the performance of the proposed inverter. Full article
(This article belongs to the Special Issue Design and Optimization of High-Frequency Power Converter)
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