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Energies
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Intelligent Wireless Power Transfer System and Its Application 2021
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Intelligent Wireless Power Transfer System and Its Application 2021

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F: Electrical Engineering".

Deadline for manuscript submissions: closed (15 January 2022) | Viewed by 11547

Special Issue Editors

Prof. Dr. Mauro Feliziani

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Guest Editor
Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy
Interests: wireless power transfer (WPT); electromagnetic compatibility (EMC); electromagnetic field (EMF) safety; computational electromagnetics
Special Issues, Collections and Topics in MDPI journals
Dr. Tommaso Campi

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Guest Editor
Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy
Interests: wireless power transfer; bioelectromagnetics; electromagnetic compatibility
Special Issues, Collections and Topics in MDPI journals
Dr. Silvano Cruciani

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Guest Editor
Department of Astronautics, Electrical and Energetic Engineering, Sapienza University of Rome, Rome, Italy
Interests: wireless power transfer; numerical methods; bioelectromagnetics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Wireless power transfer (WPT) technology will be widely used in the near future because it permits the transmission of electrical energy from a power source to an electrical load across an air gap without the use of any galvanic connection. For this reason, it is safer, cheaper, and more comfortable than traditional wired connections. The vision for the future of power supply is the gradual replacement of wire links with wireless connections, as was the case in communications a few years ago. WPT technology based on inductively coupled (resonant or nonresonant) coils is under investigation and development for a very wide range of applications in electric vehicles, drones, medical devices, consumer electronics, portable and mobile devices, sensors, IoT, etc. This Special Issue is focused on algorithms, models, methods, technologies, and applications that permit an improvement on the reliability and performance of intelligent WPT systems for fixed and mobile applications. Potential topics include but are not limited to software and hardware intelligent techniques for automatic alignment of coils and re-tuning, smart compensation, range adaptation, multicoil design and selection, soft switching, frequency selection, load matching, mitigation of electromagnetic compatibility (EMC), and electromagnetic safety issues.

Prof. Dr. Mauro Feliziani
Dr. Tommaso Campi
Dr. Silvano Cruciani
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

  • wireless power transfer (WPT)
  • inductive power transfer
  • magnetic resonance
  • power electronics
  • battery charging
  • electric vehicle (EV)
  • static and dynamic EVs charging
  • electrified road
  • railway systems
  • aircraft, UAV and drones
  • transcutaneous energy transfer (TET)
  • biomedical devices
  • electromagnetic compatibility (EMC)
  • electromagnetic (EMF) safety
  • wireless charging of mobile phones, pads, smart watches
  • soft switching converter topologies
  • advanced and new materials
  • energy harvesting
  • smart home
  • smart city
  • smart grids
  • IoT

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Published Papers (4 papers)

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Research

23 pages, 2107 KiB  
Article
Standing Wave Pattern and Distribution of Currents in Resonator Arrays for Wireless Power Transfer
by Mattia Simonazzi, Ugo Reggiani and Leonardo Sandrolini
Energies 2022, 15(2), 652; https://doi.org/10.3390/en15020652 - 17 Jan 2022
Cited by 11 | Viewed by 2230
Abstract
The possibility of increasing the transmission efficiency in mid-range wireless power transfer (WPT) applications can be achieved by inserting resonant relay coils between the transmitting and receiving sides of the device, forming an array of magnetically coupled resonant circuits, over which a receiver [...] Read more.
The possibility of increasing the transmission efficiency in mid-range wireless power transfer (WPT) applications can be achieved by inserting resonant relay coils between the transmitting and receiving sides of the device, forming an array of magnetically coupled resonant circuits, over which a receiver can be placed. This is a very cheap solution for improving the performance of the WPT apparatus, even if the complexity of the system increases, requiring a complete and detailed investigation for a smart design and control of the apparatus. The presented study investigates the current distribution in the coils of the array, which revealed strong peaks in magnitude depending on the load and receiver position. The analysis is carried out with the transmission line (TL) theory and it is performed for different positions of the receiver, as well as for different load conditions. Furthermore, a real application is considered and discussed, which includes the presence of a power converter as power supply and a battery charging system as load. Each resonant circuit resonates at 150 kHz and the whole apparatus is capable to transmit power up to 1 kW with an efficiency around 70%. The theoretical results have been validated with experimental measurements. Full article
(This article belongs to the Special Issue Intelligent Wireless Power Transfer System and Its Application 2021)
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14 pages, 4636 KiB  
Article
Efficient Wireless Drone Charging Pad for Any Landing Position and Orientation
by Tommaso Campi, Silvano Cruciani, Francesca Maradei and Mauro Feliziani
Energies 2021, 14(23), 8188; https://doi.org/10.3390/en14238188 - 6 Dec 2021
Cited by 11 | Viewed by 3200
Abstract
A wireless charging pad for drones based on resonant magnetic technology to recharge the internal battery is presented. The goal of the study was to design a robust, reliable and efficient charging station where a drone can land to automatically recharge its battery. [...] Read more.
A wireless charging pad for drones based on resonant magnetic technology to recharge the internal battery is presented. The goal of the study was to design a robust, reliable and efficient charging station where a drone can land to automatically recharge its battery. The components of the wireless power transfer (WPT) system on board the drone must be compact and light in order not to alter the payload of the drone. In this study, the non-planar receiving coil of the WPT system is integrated into the drone’s landing gear while the transmitting pad is designed to be efficient for any landing point and orientation of the drone in the charging pad area. To meet these requirements, power transmission is accomplished by an array of planar coils integrated into the ground base station. The configuration of the WPT coil system, including a three-dimensional receiving coil and a multicoil transmitter, is deeply analyzed to evaluate the performance of the WPT, considering potential lateral misalignment and rotation of the receiving coil due to imprecise drone landing. According to the proposed configuration, the battery of a light drone (2 kg in weight and 0.5 kg in payload) is recharged in less than an hour, with an efficiency always greater than 75%. Full article
(This article belongs to the Special Issue Intelligent Wireless Power Transfer System and Its Application 2021)
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14 pages, 4332 KiB  
Article
Reduction in Human Interaction with Magnetic Resonant Coupling WPT Systems with Grounded Loop
by Xianyi Duan, Junqing Lan, Yinliang Diao, Jose Gomez-Tames, Hiroshi Hirayama, Masashi Hotta, George Fischer and Akimasa Hirata
Energies 2021, 14(21), 7253; https://doi.org/10.3390/en14217253 - 3 Nov 2021
Cited by 3 | Viewed by 2232
Abstract
Wireless power transfer (WPT) systems have attracted considerable attention in relation to providing a reliable and convenient power supply. Among the challenges in this area are maintaining the performance of the WPT system with the presence of a human body and minimizing the [...] Read more.
Wireless power transfer (WPT) systems have attracted considerable attention in relation to providing a reliable and convenient power supply. Among the challenges in this area are maintaining the performance of the WPT system with the presence of a human body and minimizing the induced physical quantities in the human body. This study proposes a magnetic resonant coupling WPT (MRC-WPT) system that utilizes a resonator with a grounded loop to mitigate its interaction with a human body and achieve a high-efficiency power transfer at a short range. Our proposed system is based on a grounded loop to reduce the leakage of the electric field, resulting in less interaction with the human body. As a result, a transmission efficiency higher than 70% is achieved at a transmission distance of approximately 25 cm. Under the maximum-efficiency conditions of the WPT system, the use of a resonator with a grounded loop reduces the induced electric field, the peak spatial-average specific absorption rate (psSAR), and the whole-body averaged SAR by 43.6%, 69.7%, and 65.6%, respectively. The maximum permissible input power values for the proposed WPT systems are 40 and 33.5 kW, as prescribed in the International Commission of Non-Ionizing Radiation Protection (ICNIRP) guidelines to comply with the limits for local and whole-body average SAR. Full article
(This article belongs to the Special Issue Intelligent Wireless Power Transfer System and Its Application 2021)
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15 pages, 5558 KiB  
Article
Analysis of Dynamic Characteristics of Foreign Metal Objects under Electromagnetic Force in High-Power Wireless Power Transfer
by Xian Zhang, Yanan Ren, Lin Sha, Qingxin Yang, Xuejing Ni and Fengxian Wang
Energies 2020, 13(15), 3881; https://doi.org/10.3390/en13153881 - 30 Jul 2020
Cited by 6 | Viewed by 2330
Abstract
Because of the noncontact structure of wireless power transfer (WPT) systems, foreign metal objects can easily enter into the coupling region—and often move under the action of electromagnetic force (EMF), instead of staying relatively static, which brings a difficult problem for foreign object [...] Read more.
Because of the noncontact structure of wireless power transfer (WPT) systems, foreign metal objects can easily enter into the coupling region—and often move under the action of electromagnetic force (EMF), instead of staying relatively static, which brings a difficult problem for foreign object detection technology. In this paper, we investigate the motion state of foreign metal objects with different properties under the action of electromagnetic force in the coupling space of WPT system. The equivalent model of the circuit parameters with the intervention of foreign metal objects and the differential equations for the motion of foreign metal objects are derived. Combined with finite-element simulation calculations, the motion characteristic of ferromagnetic and non-ferromagnetic metals under EMF was analyzed. The results show that, due to the size and properties of the metal, non-ferromagnetic foreign metal objects have four states: vibration, suspension, static and flying out. The ferromagnetic foreign metal objects will adsorb on the coil surface and rapidly heat up. By establishing an experimental prototype, the analysis uses high-speed acquisition equipment to obtain the movement of foreign metal objects which verified the correctness of the simulation. This research is also beneficial to the operational safety and reliability of the WPT. Full article
(This article belongs to the Special Issue Intelligent Wireless Power Transfer System and Its Application 2021)
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