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Energies
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Advanced Technology in Wireless Power Transfer and Harvesting Systems
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Advanced Technology in Wireless Power Transfer and Harvesting Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F1: Electrical Power System".

Deadline for manuscript submissions: closed (12 July 2024) | Viewed by 1890

Special Issue Editors

Dr. Xiaoqiang Gu

E-Mail Website
Guest Editor
Department of Electrical and Computer Engineering, McGill University, Montreal, QC, Canada
Interests: energy-efficient emerging wireless technologies; wireless power transfer; wireless power harvesting; backscattering; battery-free sensing and communications; applied electromagnetics
Dr. Dong-Wook Seo

E-Mail Website
Guest Editor
Interdisciplinary Major of Maritime AI Convergence, Korea Maritime and Ocean University, Busan 49112, Republic of Korea
Interests: wireless power transfer; biomedical implantable device; energy harvesting system; radar cross section (RCS); automotive radar system; mmWave antenna; applied RF/microwave
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Zhu Liu

E-Mail Website
Guest Editor
School of Physics and Electronics, Hunan Normal University, Changsha 410081, China
Interests: wireless power transfer, wireless energy harvesting, antennas, and wearable electronics

Special Issue Information

Dear Colleagues,

The concept of wireless power transfer can be traced back to Tesla’s experimentation in 1899 and has experienced renewed momentum since the introduction of resonant coupling wireless power transfer technology in 2007. So far, some commercial products based on near-field wireless power transfer have been successfully rolled out. Far-field wireless power harvesting has been considered a promising and key enabling technology for energizing a large-scale sensing and communication network.     

Challenges in wireless power transfer and harvesting attract plots of research efforts, such as enhancing operating distance (near-field), improving rectifying efficiency (far-field), optimizing system-level integrated design, and identifying emerging applications. This Special Issue aims to invite submissions related to wireless power transfer and harvesting technology that highlight recent advancements and provide a forward-looking perspective.  

Topics of interest include but are not limited to:

  1. Inductive wireless power transfer;
  2. Capacitive wireless power transfer;
  3. Static and dynamic wireless charging;
  4. Acoustic, optical, and solar wireless power transfer;
  5. High-frequency rectifying circuit design;
  6. Rectennas and antenna design for rectifiers;
  7. Simultaneous wireless information and power transfer;
  8. Hybrid power harvesters;
  9. Battery-free sensing and communications systems;
  10. Backscattering, RFID, and electronic tags.

Dr. Xiaoqiang Gu
Dr. Dong-Wook Seo
Prof. Dr. Zhu Liu
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
  • wireless power harvesting
  • capacitive coupling
  • inductive coupling
  • rectifiers
  • rectennas
  • battery-free sensing
  • Internet of Things

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Published Papers (2 papers)

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Research

26 pages, 10541 KiB  
Article
Modeling and Transmission Characteristics Study of a Resonant Underwater Wireless Electric Power Transmission System
by Qiong Hu, Yu Qin, Zhenfu Li, Meiling Zheng, Junqiang Huang and Yujia Ou
Energies 2024, 17(15), 3717; https://doi.org/10.3390/en17153717 - 28 Jul 2024
Viewed by 587
Abstract
Compared to the traditional wet-mate underwater power supply method, Magnetic Coupling Resonant Wireless Power Transfer (MCR-WPT) technology boasts advantages such as excellent insulation, high safety, and convenient operation, showing promising application prospects in the field of power supply for underwater vehicles and other [...] Read more.
Compared to the traditional wet-mate underwater power supply method, Magnetic Coupling Resonant Wireless Power Transfer (MCR-WPT) technology boasts advantages such as excellent insulation, high safety, and convenient operation, showing promising application prospects in the field of power supply for underwater vehicles and other mobile underwater devices. In order to explore the transmission characteristics of this technology underwater, this article first establishes a traditional mathematical model, and then modifies the underwater model through analysis of changes in coil self-inductance and mutual inductance, as well as the impact of eddy current losses. Using the modified mathematical model of the underwater MCR-WPT system, the transmission characteristics are analyzed, and simulations and experimental validations are performed using MATLAB R2022a software. In the study of frequency characteristics, it is found that the system operates optimally when both ends of the circuit work at the resonant state; that is, when finput = fresonance = 100 kHz, the output performance is at its best, and the optimal resonant frequency significantly improves power and transmission efficiency. When the input frequency is less than 87.3 kHz or greater than 122.9 kHz, the output power decreases to less than half of the maximum power. In the investigation of load effects, the optimal load for maximizing system output power was identified, but the load that maximizes transmission efficiency is different from this optimal load. This study provides strong theoretical support and guidance for improving the performance of underwater wireless power transmission systems. Full article
(This article belongs to the Special Issue Advanced Technology in Wireless Power Transfer and Harvesting Systems)
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15 pages, 3165 KiB  
Article
Analysis of the Wireless Power Transfer System Using a Finite Grid of Planar Circular Coils
by Jacek Maciej Stankiewicz
Energies 2023, 16(22), 7651; https://doi.org/10.3390/en16227651 - 19 Nov 2023
Cited by 3 | Viewed by 880
Abstract
In this paper was analysed a wireless power transfer system (WPT) with multiple resonators supplying, for example, sensors or LED lighting. Energy is transferred simultaneously using a group of identical planar spiral circular coils acting as transmitters and receivers. These coils were arranged [...] Read more.
In this paper was analysed a wireless power transfer system (WPT) with multiple resonators supplying, for example, sensors or LED lighting. Energy is transferred simultaneously using a group of identical planar spiral circular coils acting as transmitters and receivers. These coils were arranged to form transmitting and receiving planes. The receivers were connected to independent power supply circuits of each, e.g., sensor or LED lighting. Higher power reliability and flexibility can be achieved by isolating these circuits. The proposed system was described and discussed. Taking into account the skin effect and mutual couplings, a theoretical analysis was made. A detailed analysis was made at the resonant frequency of the system. The system was modeled using a matrix equation and appropriate formulas. The calculations were verified experimentally for different loads and two distances between transmitters and receivers. The efficiency and receiver power were compared and discussed. The maximum efficiency was about 45% at the small distance between the planes. The maximum efficiency of the WPT system decreased more than two times to less than 20% when the distance between the coils was doubled. The results and discussion of the conducted analysis may provide valuable knowledge when designing this type of system. Full article
(This article belongs to the Special Issue Advanced Technology in Wireless Power Transfer and Harvesting Systems)
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