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Electronics
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High-Frequency Power Converters
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High-Frequency Power Converters

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

Deadline for manuscript submissions: closed (31 January 2022) | Viewed by 11343

Special Issue Editors

Prof. Dr. Huang-Jen Chiu

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Guest Editor
Distinguished Professor and Dean of Industry-Academia Collaboration, National Taiwan University of Science and Technology, Taipei City 106, Taiwan
Interests: switching power supply design; high-power-density converter
Dr. Minh-Khai Nguyen

E-Mail Website
Guest Editor
Department of Electrical and Computer Engineering, Wayne State University, Detroit, MI 48202, USA
Interests: power electronics; impedance-source converters; multilevel inverters; PWM strategies; power converters for renewable energy systems and electric vehicles
Special Issues, Collections and Topics in MDPI journals
Dr. Anh Dung Nguyen

E-Mail Website
Guest Editor
The Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
Interests: high-efficiency, high-power-density converter; digital control; magnetic design for power converter

Special Issue Information

Dear Colleagues,

The study of high-switching-frequency power converters has received widespread attention due to the rapid development of technologies and industrial applications. Power converters operating at hundreds of kHz to Mega-Hertz range have a high-power density and compact size, but cause difficulties in terms of design, modelling, control, and analysis. The use of wide-bandgap devices such as Silicon Carbide (SiC) and Gallium Nitride (GaN) creates new challenges for the compact design of high-switching power converters. In order to employ high switching frequency to the power converters, a deep investigation in terms of the analysis of the control or topology as well as the design methodology and control solution is required.

Authors are invited to submit full papers describing original research work in areas including but not limited to the following:

  • Innovated topologies in high-frequency, high-power-density power conversion;
  • Design methodology of high-frequency power converters such as magnetic design and circuit design;
  • Wide bandgap devices in high-frequency power conversion;
  • Control solution (analog, digital, or mixed signal) for high-frequency power converters;
  • Modelling for high-frequency power converter, including dynamic modelling and power loss characterization;
  • Soft-switching techniques for power converters.

Prof. Dr. Huang-Jen Chiu
Dr. Anh Dung Nguyen
Dr. Minh-Khai Nguyen
Guest Editors

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 submissions that pass pre-check are 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 semimonthly 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 2400 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.

Keywords

  • high-frequency converters
  • high-power density
  • soft-switching techniques
  • wide-bandgap devices
  • SiC
  • GaN
  • DC–DC converters

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Published Papers (4 papers)

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Research

13 pages, 5264 KiB  
Article
An Investigation of Zero-Voltage-Switching Condition in a High-Voltage-Gain Bidirectional DC–DC Converter
by Nhat-Truong Phan, Anh-Dung Nguyen, Yu-Chen Liu and Huang-Jen Chiu
Electronics 2021, 10(16), 1940; https://doi.org/10.3390/electronics10161940 - 11 Aug 2021
Cited by 4 | Viewed by 2085
Abstract
This paper analyzes the zero-voltage switching (ZVS) for all switches in a high-voltage-gain bidirectional DC–DC converter in triangular conduction mode (TCM) operation without any auxiliary components. From the ZVS condition, the reverse inductor current can be derived, and the required dead-time duration between [...] Read more.
This paper analyzes the zero-voltage switching (ZVS) for all switches in a high-voltage-gain bidirectional DC–DC converter in triangular conduction mode (TCM) operation without any auxiliary components. From the ZVS condition, the reverse inductor current can be derived, and the required dead-time duration between the main switches and SR switches can be determined, which leads to a reduction in the duty cycle loss. Moreover, the relationship between switching frequency and load in TCM operation can be determined, which helps to reduce the peak-to-peak inductor current and reduce the conduction loss at light load. An experimental prototype of a high-voltage-gain bidirectional DC–DC converter is implemented with a maximum output power of 48 W. The result shows the peak efficiency of 97% and 96.8% in the forward and reverse directions, respectively. Full article
(This article belongs to the Special Issue High-Frequency Power Converters)
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14 pages, 5886 KiB  
Article
Comparison of Different Large Signal Measurement Setups for High Frequency Inductors
by Jaime Lopez-Lopez, Cristina Fernandez, Andrés Barrado and Pablo Zumel
Electronics 2021, 10(6), 691; https://doi.org/10.3390/electronics10060691 - 15 Mar 2021
Cited by 2 | Viewed by 1764
Abstract
The growing interest of miniaturized power converters has pushed the development of high frequency inductors integrated in Power Supply on Chip or Power Supply in Package. The proper characterization of inductor impedance is a challenge due to the dependence of the impedance on [...] Read more.
The growing interest of miniaturized power converters has pushed the development of high frequency inductors integrated in Power Supply on Chip or Power Supply in Package. The proper characterization of inductor impedance is a challenge due to the dependence of the impedance on the current, the high quality factor (Q) and the high frequency range where these devices operate. In this paper, we present a comparison of different measuring methods to characterize high frequency and high Q inductors. The comparison is based on a systematic analysis of the measurement process, quantifying the influence of the parameters that affect the measurement result. Four common measurement setups are analyzed and compared. To validate the calculations, the resistance of a high frequency, high-Q inductor is characterized using every presented setup. The good match between calculations, simulation and measurement validates the analysis and the conclusions extracted. Full article
(This article belongs to the Special Issue High-Frequency Power Converters)
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18 pages, 2755 KiB  
Article
Three-Output Flyback Converter with Synchronous Rectification for Improving Cross-Regulation and Efficiency
by Chung-Ming Leng and Huang-Jen Chiu
Electronics 2021, 10(4), 430; https://doi.org/10.3390/electronics10040430 - 9 Feb 2021
Cited by 9 | Viewed by 3936
Abstract
This paper proposes a single stage alternating current/direct current (AC/DC) flyback converter which contains three output windings with synchronous rectification (SR) function to achieve better cross-regulation and efficiency. Because the three output windings are stacked in a series structure and use synchronous rectification [...] Read more.
This paper proposes a single stage alternating current/direct current (AC/DC) flyback converter which contains three output windings with synchronous rectification (SR) function to achieve better cross-regulation and efficiency. Because the three output windings are stacked in a series structure and use synchronous rectification instead of diode rectification, the forward conduction loss of the diode can be eliminated, and the current of each winding can flow bilaterally. Therefore, the energy of leakage inductance can be dissipated through heavy load winding without transient overvoltage in light load winding. Compared with existing methods in the literature, the proposed converter can be realized by simple analog IC with fewer winding turns. Finally, under the extreme load imbalance condition, the cross-regulation is still within ±2.26%. The maximum efficiency of the proposed converter reaches 87%, which is about 3% higher than the conventional Schottky diode solution’s efficiency. The circuit structure and operation principle are described. A practical prototype and experiment results are implemented to verify the feasibility of the proposed converter. Full article
(This article belongs to the Special Issue High-Frequency Power Converters)
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17 pages, 6441 KiB  
Article
Analysis of Symmetric Dual Switch Converter under High Switching Frequency Conditions
by Yu Tang, Dekai Kong and Haisheng Tong
Electronics 2020, 9(12), 2183; https://doi.org/10.3390/electronics9122183 - 18 Dec 2020
Viewed by 1877
Abstract
Electric vehicle batteries have the problem of low output voltage, so the application of a high-gain converter is a research hotspot. The symmetrical dual-switch high gain converter has the merits of simple structure, low voltage and current stress, and low EMI. Due to [...] Read more.
Electric vehicle batteries have the problem of low output voltage, so the application of a high-gain converter is a research hotspot. The symmetrical dual-switch high gain converter has the merits of simple structure, low voltage and current stress, and low EMI. Due to the deterioration of circuit performance caused by circuit parasitic parameters under high frequency operating conditions, the former analysis under low frequency condition cannot satisfy the requirements for performance evaluation. To clarify whether the symmetrical dual-switch high-gain converter can maintain its operating characteristics under high-frequency operating conditions, this paper establishes the converter model considering parasitic parameters, and deduces the sneak circuit modes at high frequency. The effects of parasitic parameters at high frequency on voltage gain, switch stress, and symmetrical operating are analyzed, which is beneficial for the selection and optimization of power devices. This paper believes that considering parasitic parameters may reduce the output gain of the symmetrical double-switch high-gain converter considering parasitic parameters under high frequency conditions, increase the switching stress, and affect the symmetry of the circuit operation when the parasitic parameter values are different. Finally, an experimental platform rated on 200 W with 200 kHz switching frequency is established, and experimental verification is given to verify the analysis. Full article
(This article belongs to the Special Issue High-Frequency Power Converters)
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