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Recent Advances in Power Electronics and Wireless Power Transfer Systems
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Recent Advances in Power Electronics and Wireless Power Transfer Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F3: Power Electronics".

Deadline for manuscript submissions: 15 July 2025 | Viewed by 6495

Special Issue Editors

Prof. Dr. Kalina Detka

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Guest Editor
Department of Marine Electronics, Faculty of Electrical Engineering, Gdynia Maritime University, Morska 83, 81-225 Gdynia, Poland
Interests: power electronics; power converters; wireless power transfer; energy storage technology; magnetic elements; modelling electronic components
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Krzysztof Górecki

E-Mail Website
Guest Editor
Department of Marine Electronics, Faculty of Electrical Engineering, Gdynia Maritime University, Morska 83, 81-225 Gdynia, Poland
Interests: power electronics; power converters; wireless power transfer; energy storage technology; magnetic elements; modelling electronic components and systems; IGBT; MOSFET; BJT; power LEDs; electrothermal analysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Recently, there has been a significant interest in wireless power transfer systems. They are widely used not only in the electronics industry but also in the automotive and medical industries. In each case, the aim is to miniaturize these systems while maintaining their high energy efficiency. Such systems, in general, apart from the transmitter and the receiver, also contain different types of power conversion systems that affect the value of the transferred and converted power, and thus, the energy efficiency of such a solution.

The effect of miniaturization is also observed in modern power electronic systems. Increasing the switching frequency of switching devices imposes limitations on the applicability of some semiconductor devices and increases the power losses in magnetic elements. This is also accompanied by an increase in the internal temperature of the electronic components included in these systems.

Therefore, the purpose of this Special Issue is to indicate new trends and research in the field of new power electronic solutions and wireless power supply systems.

Prof. Dr. Kalina Detka
Prof. Dr. Krzysztof Górecki
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. Energies 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 2600 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

  • power semiconductor devices
  • air core transformers
  • wireless power transfer
  • WPT systems
  • power supply
  • power converters
  • pulse transformers
  • inductors
  • thermal parameters
  • modeling
  • measurements
  • reliability

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Published Papers (6 papers)

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Research

17 pages, 3909 KiB  
Article
Input Power Quality Enhancement in Controlled Single-Phase AC to DC Converter
by Naveed Ashraf, Ghulam Abbas and Tanveer Yazdan
Energies 2025, 18(7), 1674; https://doi.org/10.3390/en18071674 - 27 Mar 2025
Cited by 1 | Viewed by 207
Abstract
Voltage-controlled AC to DC converters govern the load voltage as per requirement. They may be employed in numerous applications, including battery-charging systems, light dimming, and industrial speed drive systems. The voltage regulation is based on the delay angle control of the thyristors, which [...] Read more.
Voltage-controlled AC to DC converters govern the load voltage as per requirement. They may be employed in numerous applications, including battery-charging systems, light dimming, and industrial speed drive systems. The voltage regulation is based on the delay angle control of the thyristors, which has a simple gate control mechanism. Still, their input currents are highly distorted due to the generation of low-order harmonics. Also, their output voltage can only be regulated in step-down mode. The total harmonic distortion (THD) of the input current depends on the relative value of the fundamental frequency components to their non-fundamental component. The power factor (PF) also depends on these values, as well as the phase displacement angle, which is controlled by the firing delay. The improvement in THD and PF can be enhanced by maintaining the sinusoidal characteristics of the input current as much as possible. The use of an AC filter may enhance these characteristics, but filtering the low-order harmonics is a big challenge. This research suggests a novel control and circuit of a single-phase rectifier that may ensure the sinusoidal characteristics of the input current with a dual polarity-controlled output voltage. Thus, it improves the THD and PF for any polarity of the output DC voltage. A practical test circuit is built for the validation of the analytical and computer simulation results. Full article
(This article belongs to the Special Issue Recent Advances in Power Electronics and Wireless Power Transfer Systems)
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18 pages, 5704 KiB  
Article
Influence of Construction of High Frequency Air Transformers for SMPS on Parameters of Their Compact Thermal Model
by Krzysztof Górecki and Kalina Detka
Energies 2025, 18(6), 1313; https://doi.org/10.3390/en18061313 - 7 Mar 2025
Viewed by 390
Abstract
High frequency air transformers for switched-mode power supply (SMPS) are important components of wireless power transfer systems (WPT). This paper describes a compact thermal model of such transformers. This model takes into account self-heating in all components of such a transformer and mutual [...] Read more.
High frequency air transformers for switched-mode power supply (SMPS) are important components of wireless power transfer systems (WPT). This paper describes a compact thermal model of such transformers. This model takes into account self-heating in all components of such a transformer and mutual thermal couplings between these components. Methods of measurement of self- and transfer transient thermal impedances characterizing properties of the considered devices are proposed. The form of the elaborated model is described together with a parameters estimation method. Some results of measurements and calculations illustrating an influence of selected factors on waveforms of self- and transfer transient thermal impedances obtained for different constructions of the tested devices are shown and discussed. Two kinds of constructions of the air transformers are considered—with ferrite plates and without them. Different dimensions of the coils and different distances between them are considered. A good agreement is obtained between the results of measurements and simulations for all the considered constructions of the tested transformers operating in different conditions. Full article
(This article belongs to the Special Issue Recent Advances in Power Electronics and Wireless Power Transfer Systems)
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21 pages, 13816 KiB  
Article
Robust Wireless Power Transfer for EVs by Self-Oscillating Controlled Inverters and Identical Single-Coil Transmitting and Receiving Pads
by Alireza Eikani, Mohammad Amirkhani, Ehsan Farmahini Farahani, Volker Pickert, Mojtaba Mirsalim and Sadegh Vaez-Zadeh
Energies 2025, 18(1), 211; https://doi.org/10.3390/en18010211 - 6 Jan 2025
Cited by 1 | Viewed by 1074
Abstract
Inductive wireless power transfer (IWPT) with stable output power and high efficiency is a major challenge for charging electric vehicles (EVs). This paper, for the first time, develops a robust IWPT system using a circular pad (CP) and double-D pad (DDP) with a [...] Read more.
Inductive wireless power transfer (IWPT) with stable output power and high efficiency is a major challenge for charging electric vehicles (EVs). This paper, for the first time, develops a robust IWPT system using a circular pad (CP) and double-D pad (DDP) with a self-oscillating controlled inverter (SOCI), which offers high steady output power and transfer efficiency under magnetic coupling variations simply with feedback from the transmitter-side current. The compact 2CP and 2DDP magnetic couplers with single identical coils are robust to self- and mutual-inductance variations, so the IWPT system exhibits greater robustness at increased transfer distances (air gaps), as well as in the presence of lateral and rotational misalignments between the two magnetic pads, compared to couplers using nonidentical transmitting primary (TP) and receiving secondary (RS) pads and numerous decoupled coils on the RS pad. Based on a thorough analysis and experimental study, the proposed 1 kW IWPT system with 2CP and 2DDP couplers with up to a 20 cm air gap achieves constant output power with 93% and 92% constant transfer efficiency, respectively. The 2CP with a 15 cm air gap and the 2DDP with a 20 cm air gap, with up to 12 cm lateral misalignment, can tolerate coupling variations. Full article
(This article belongs to the Special Issue Recent Advances in Power Electronics and Wireless Power Transfer Systems)
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13 pages, 1499 KiB  
Article
A Light-Load Efficiency Improvement Technique for an Inductive Power Transfer System through a Reconfigurable Circuit
by Xuebin Zhou, Jiabin Wang and Lin Yang
Energies 2024, 17(12), 3024; https://doi.org/10.3390/en17123024 - 19 Jun 2024
Cited by 3 | Viewed by 951
Abstract
Constant voltage (CV) charging and efficiency improvement are the most basic and main targets to be achieved in inductive power transfer (IPT) systems. However, efficiency may be jeopardized as battery charging progresses, especially under a light-load condition, which accounts for most of the [...] Read more.
Constant voltage (CV) charging and efficiency improvement are the most basic and main targets to be achieved in inductive power transfer (IPT) systems. However, efficiency may be jeopardized as battery charging progresses, especially under a light-load condition, which accounts for most of the charging time. Traditional maximum-efficiency tracking (MET) control provides an effective solution to the above issues. However, MET control not only brings the difficulties of complicated control and increased cost/volume, but also increases the additional power losses because of the introduction of additional converters or hard-switching in dual-shift phase control. To address the above difficulty, a light-load efficiency improvement (LLEI) technique is presented in this study. Under a heavy-load condition, both the inverter and rectifier operate in conventional full-bridge mode with satisfactory efficiency. Under a light-load condition, both the rectifier and inverter are reconfigured as a voltage-doubler rectifier and half-bridge inverter, respectively, to achieve two targets: one is to keep the charging voltage roughly unchanged, and the other is to force the equivalent load resistance (ELR) approach to the optimal point to improve system power transfer efficiency. A demonstrative experimental prototype with a charging voltage of 60 V is constructed and tested to validate the LLEI method proposed in this study. The experimental results show that the proposal can ensure stable CV charging and significantly improve the system efficiency under a light-load condition over the whole charging process. Full article
(This article belongs to the Special Issue Recent Advances in Power Electronics and Wireless Power Transfer Systems)
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18 pages, 861 KiB  
Article
Optimal Selection of Switch Model Parameters for ADC-Based Power Converters
by Saif Alsarayreh and Zoltán Sütő
Energies 2024, 17(1), 56; https://doi.org/10.3390/en17010056 - 21 Dec 2023
Cited by 2 | Viewed by 1326
Abstract
Real-time hardware-in-the-loop-(HIL) simulation integration is now a fundamental component of the power electronics control design cycle. This integration is required to test the efficacy of controller implementations. Even though hardware-in-the-loop-(HIL) tools use FPGA devices with computing power that is rapidly evolving, developers constantly [...] Read more.
Real-time hardware-in-the-loop-(HIL) simulation integration is now a fundamental component of the power electronics control design cycle. This integration is required to test the efficacy of controller implementations. Even though hardware-in-the-loop-(HIL) tools use FPGA devices with computing power that is rapidly evolving, developers constantly need to balance the ease of deploying models with acceptable accuracy. This study introduces a methodology for implementing a full-bridge inverter and buck converter utilising the associate-discrete-circuit-(ADC) model, which is optimised for real-time simulator applications. Additionally, this work introduces a new approach for choosing ADC parameter values by using the artificial-bee-colony-(ABC) algorithm, the firefly algorithm (FFA), and the genetic algorithm (GA). The implementation of the ADC-based model enables the development of a consistent architecture in simulation, regardless of the states of the switches. The simulation results demonstrate the efficacy of the proposed methodology in selecting optimal parameters for an ADC-switch-based full-bridge inverter and buck converter. These results indicate a reduction in overshoot and settling time observed in both the output voltage and current of the chosen topologies. Full article
(This article belongs to the Special Issue Recent Advances in Power Electronics and Wireless Power Transfer Systems)
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18 pages, 3433 KiB  
Article
Novel Control Approach for Resonant Class-DE Inverters Applied in Wireless Power Transfer Systems
by Juan Pablo Ochoa Avilés, Fernando Lessa Tofoli and Enio Roberto Ribeiro
Energies 2023, 16(21), 7238; https://doi.org/10.3390/en16217238 - 24 Oct 2023
Cited by 3 | Viewed by 1745
Abstract
Regulating the load voltage is of major importance for ensuring high transmission efficiency in wireless power transfer (WPT) systems. In this context, this work presents a novel control strategy applied in the dc-ac converter used in the primary side of a WPT system. [...] Read more.
Regulating the load voltage is of major importance for ensuring high transmission efficiency in wireless power transfer (WPT) systems. In this context, this work presents a novel control strategy applied in the dc-ac converter used in the primary side of a WPT system. The performance of a class-DE resonant inverter is investigated considering that such topology presents inherent soft-switching characteristics, thus implying reduced switching losses. The controller relies on an autoregressive with exogenous output (ARX) model based on an adaptive linear neuron (ADALINE) network, which allows for determining the turn-on time of the active switches accurately while providing the system with the ability to adapt to distinct alignment conditions. The performance of the proposed controller is compared with that of a linear controller, which does not prove to be an effective solution if misalignment occurs. Full article
(This article belongs to the Special Issue Recent Advances in Power Electronics and Wireless Power Transfer Systems)
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