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Applied Sciences
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Innovative Technologies in Power Electronics Converters
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Innovative Technologies in Power Electronics Converters

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".

Deadline for manuscript submissions: 20 July 2024 | Viewed by 1919

Special Issue Editors

Dr. Minsung Kim

E-Mail Website
Guest Editor
Department of Electronic and Electrical Engineering, Dongguk University-Seoul Campus, Seoul 04620, Republic of Korea
Interests: highly efficient power conversion circuit design; intelligent controller design for industrial electronics; renewable energy and energy storage systems
Special Issues, Collections and Topics in MDPI journals
Dr. Byeongcheol Han

E-Mail Website
Guest Editor
School of Electronics Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
Interests: GaN-based power electronic circuit design; modulation techniques for EMI noise reduction; nonlinear systems and control; grid-connected inverters; advanced control design for power conversion systems.

Special Issue Information

Dear Colleagues，

With the rapid expansion of the electric vehicle market, the demand for batteries for electric vehicles is increasing. Power conversion circuits are essential to cope with the wide voltage variation of the battery during the charging and discharging processes. In addition, as the price of wide bandgap devices is cheaper, compact interface circuits that switch at high frequency using wide bandgap devices are being released in the market. Furthermore, research on the operational reliability of power conversion circuits has also been actively conducted. This trend can also be observed in renewable energy systems, home appliances, wireless power systems, and pulse power systems.

We encourage researchers in this field to contribute their original papers to share their technical achievements with the readers. The subjects included, but are not limited to:

  • Converters operating at high switching frequency;
  • Soft switched converters;
  • Compact design of passive power components;
  • Optimal use of wide band gapped devices;
  • Multi-level, multi-phase converters;
  • Fault tolerent converters;
  • Control strategies for emerging converters.

Dr. Minsung Kim
Dr. Byeongcheol Han
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. Applied Sciences 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

  • converters operating at high switching frequency
  • soft switched converters
  • compact design of passive power components
  • optimal use of wide band gapped devices
  • multi-level, multi-phase converters
  • fault tolerent converters
  • control strategies for emerging converters

Published Papers (2 papers)

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Research

24 pages, 15369 KiB  
Article
Design of Dual-Notch-Filter-Based Controllers for Enhancing the Dynamic Response of Universal Single-Phase Grid-Connected Power Converters
by Sahar Borafker, Pavel Strajnikov and Alon Kuperman
Appl. Sci. 2023, 13(18), 10144; https://doi.org/10.3390/app131810144 - 08 Sep 2023
Viewed by 668
Abstract
Trade-off between transient response and grid-side current quality is a well-known issue of single-phase mains-connected power converters. A dual-loop control structure (usually based on PI or type-II controllers) is typically employed in such systems to regulate the DC link voltage to a constant [...] Read more.
Trade-off between transient response and grid-side current quality is a well-known issue of single-phase mains-connected power converters. A dual-loop control structure (usually based on PI or type-II controllers) is typically employed in such systems to regulate the DC link voltage to a constant reference (in order to maintain power balance) while forcing the grid-side current to have a specific shape (in order to comply with power quality requirements). Introducing notch term/s (tuned to certain multiple/s of the mains base frequency) into one of the loops allows either for the improvement of the dynamic performance without worsening the total harmonic distortion of grid-side current or for the enhancement of the current quality without impairing the dynamic response. Since the maximum tolerable value of total harmonic distortion is typically imposed by a certain power quality standard, it is desirable to enhance the transient response of the power converter system as much as possible while keeping the total harmonic distortion at the maximum allowed value. However, universal off-grid operating power conversion systems must support both 50 Hz and 60 Hz mains; consequently, tuning the notch term/s to 50 Hz multiple/s would not be sufficient for a 60 Hz mains operation and vice-versa. Consequently, this work examines the possibility of introducing a dual-notch term into the control loop in order to cover both above-mentioned base frequencies. It is demonstrated that under typical base frequency uncertainty values, the performances of dual-notch terms are nearly decoupled so that the term tuned to a 50 Hz frequency (and optionally to its multiples) has nearly no influence at a 60 Hz mains operation and vice-versa. Consequently, the methodology allows for the improvement of the dynamics of universal grid-connected power converters without total harmonic distortion (THD) deterioration. A stability analysis of the proposed control structure is carried out and quantitative design guidelines, allowing for the attainment of an optimized dynamic response for a given maximum tolerable total harmonic distortion, minimum allowed phase margin and a certain base frequency uncertainty, are established. It is shown that a DC link voltage loop bandwidth of 52 Hz may be attained while keeping the grid-side current THD below 5%. Simulations and experimental results support well the proposed design methodology. Full article
(This article belongs to the Special Issue Innovative Technologies in Power Electronics Converters)
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16 pages, 4145 KiB  
Article
Virtual Admittance Feedforward Compensation and Phase Correction for Average-Current-Mode-Controlled Totem-Pole PFC Converters
by Hongkai He, Desheng Zhang, Aosong Zhou, Fanwu Zhang, Xuecheng Zou, Jun Yuan and Meng Wei
Appl. Sci. 2023, 13(17), 9498; https://doi.org/10.3390/app13179498 - 22 Aug 2023
Viewed by 897
Abstract
This paper explores a current distortion problem in totem-pole bridgeless power factor correction (PFC) converters with average current mode (ACM) control. With in-depth modeling for the current and voltage loops, it was found that the current distortion is caused by the limited current [...] Read more.
This paper explores a current distortion problem in totem-pole bridgeless power factor correction (PFC) converters with average current mode (ACM) control. With in-depth modeling for the current and voltage loops, it was found that the current distortion is caused by the limited current loop bandwidth and input filter capacitor. These factors lead to the presence of a susceptance component in the input admittance, which degrades the power factor (PF) and total harmonic distortion (THD) of the PFC converter. To solve this problem, this paper proposes virtual admittance feedforward compensation (VAFC) and phase correction methods to adjust the input admittance to pure conductance. The VAFC can generate virtual admittance that compensates for susceptance components in the input admittance, while phase correction can generate an equivalent current source that offsets the current in input capacitors. Furthermore, a phase lock loop (PLL) is introduced to realize the VAFC, which reduces the feedforward interference caused by input voltage sampling noise. Finally, an experimental prototype was built to verify the effectiveness of the proposed strategies. According to the test results, the proposed compensation strategy improves the PF by 1.23%, while reducing the THD by 2.52% and achieving a peak efficiency of 98.69%. Full article
(This article belongs to the Special Issue Innovative Technologies in Power Electronics Converters)
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