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Electronics
Special Issues
Wireless Power Transfer Technology: Current Situation and Future Perspectives
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Wireless Power Transfer Technology: Current Situation and Future Perspectives

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Microwave and Wireless Communications".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 11893

Special Issue Editor

Dr. Pedro Pinho

E-Mail Website
Guest Editor
1. Instituto de Telecomunicações, 3810-193 Aveiro, Portugal
2. Departamento de Engenharia Eletrónica, Telecomunicações e de Computadores, Instituto Superior de Engenharia de Lisboa, 1959-007 Lisboa, Portugal
Interests: antennas; propagation; wireless power transfer
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Wireless power transfer (WPT) refers to technologies and systems with the purpose of transmitting electrical energy from a source to destination, without using any physical connection. Generally, two main techniques are considered for WPT systems—near-field and far-field radio-frequency (RF) methods. Inductive and/or capacitive coupling are two types of near-field method operations. However, this technique is only capable of transferring power over short distances. In contrast, with WPT based on the far-field RF technique (referred to as far-field WPT), where power is transmitted by electromagnetic radiation, the transition of electrical energy over longer distances is made possible, at the cost of lower efficiencies. This feature makes the far-field method an attractive WPT option. To further promote the development of this area, we invite researchers to contribute original research manuscripts as well as review articles on recent advances in the design and performance analysis of micro- and milli-meter-wave systems that employ the concepts of WPT.

Dr. Pedro Pinho
Guest Editor

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

  • wireless power transfer
  • WPT techniques
  • near field
  • far field
  • coupling
  • rectenna
  • backscatter
  • energy harvesting
  • IoT and RFID
  • applications

Published Papers (5 papers)

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Research

13 pages, 6679 KiB  
Article
Integrated WPT-PLC System Applied to UAV: Characterization of a Two-Coil Channel Considering Misalignment Scenarios
by Safa Zouaoui, Wael Dghais, Luis Romba, Rui Melicio and Hamdi Belgacem
Electronics 2022, 11(8), 1249; https://doi.org/10.3390/electronics11081249 - 15 Apr 2022
Cited by 1 | Viewed by 1441
Abstract
WPT system performances highly depend on the misalignment scenarios of the transmitter or the receiver coil. In this contribution, the authors analyze the effect of the misalignment influencing factors of the integrated WPT-PLC system receiving coil on the system performances. The simulations and [...] Read more.
WPT system performances highly depend on the misalignment scenarios of the transmitter or the receiver coil. In this contribution, the authors analyze the effect of the misalignment influencing factors of the integrated WPT-PLC system receiving coil on the system performances. The simulations and experimental analysis are based on power efficiency and channel capacity metrics. The simulations are performed using finite element calculations in COMSOL Multiphysics and Advanced Design System (ADS) from Keysight technology. By analyzing the results, maximum transferred power is reached under resonance conditions. For instance, the calculated efficiencies versus the misalignment cases of the WPT-PLC system varies (η = 86% to 60%) when d = [3 cm to 7 cm], s = [3 cm to 9 cm], and for a tilt angle θ ≤ 20 deg, while the optimal data rate C(bps) is achieved while appealing different data access points and under reasonable SNR value. Full article
(This article belongs to the Special Issue Wireless Power Transfer Technology: Current Situation and Future Perspectives)
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10 pages, 2751 KiB  
Article
A Comparative Analysis of S-S and LCCL-S Compensation for Wireless Power Transfer with a Wide Range Load Variation
by Yuhao Zhu, Hao Wu, Fan Li, Yongsheng Zhu, Yi Pei and Wen Liu
Electronics 2022, 11(3), 420; https://doi.org/10.3390/electronics11030420 - 29 Jan 2022
Cited by 10 | Viewed by 2956
Abstract
Wireless power transmission (WPT) has great potential for charging electric vehicles. Constant voltage (CV) and constant current (CC) are two major types of battery charging modes. In this paper, we analyze the output characteristics of series-series (S-S) topology and double capacitances and inductances-series [...] Read more.
Wireless power transmission (WPT) has great potential for charging electric vehicles. Constant voltage (CV) and constant current (CC) are two major types of battery charging modes. In this paper, we analyze the output characteristics of series-series (S-S) topology and double capacitances and inductances-series (LCCL-S) topology. Voltage gain variation is achieved in the LCCL-S compensation structure without additional components, and the system is still kept in resonant condition. A WPT experimental platform was also built and tested based on the theoretical analysis. When the load resistance is 300 Ω, a voltage gain of 0.7 or 2.22 is achieved for the LCCL-S with a compensating inductor of 100 μH or 33 μH, respectively. The experimental results fit the theoretical analysis. The CC/CV output characteristics and efficiencies of S-S and LCCL-S topologies in a wide load resistance range are also demonstrated. Moreover, zero voltage switch (ZVS) is also implemented in both two systems. Full article
(This article belongs to the Special Issue Wireless Power Transfer Technology: Current Situation and Future Perspectives)
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18 pages, 4932 KiB  
Article
Prospective Powering Strategy Development for Intelligent-Tire Sensor Power Charger Application
by C. Bambang Dwi Kuncoro, Min-Feng Sung, Cornelia Adristi, Arvanida Feizal Permana and Yean-Der Kuan
Electronics 2021, 10(12), 1424; https://doi.org/10.3390/electronics10121424 - 14 Jun 2021
Cited by 5 | Viewed by 2778
Abstract
Tire sensors embedded in a vehicle tire are stand-alone autonomous devices. A tire sensor reserve power strategy is crucial due to sensor energy sources limitations for long operational periods. This paper presents an innovative tire sensor powering strategy for the intelligent-tire system. The [...] Read more.
Tire sensors embedded in a vehicle tire are stand-alone autonomous devices. A tire sensor reserve power strategy is crucial due to sensor energy sources limitations for long operational periods. This paper presents an innovative tire sensor powering strategy for the intelligent-tire system. The powering strategy offers a green concept, maintenance-free, and low-cost method in order to extend the tire sensor lifetime for long operating periods. The proposed strategy adopts wireless power transfer (WPT) technology to transfer power to an electrical load mounted on the rotational system without an interconnection cable. It is composed of a power transmitter designed to be mounted on the vehicle’s inner fender liner, and a power receiver that provides power to recharge the tire sensor battery/energy storage. The transmitter transfers power from the vehicle battery/accumulator to a power receiver coupled with the tire sensor which is mounted on the vehicle tire inner wall. WPT devices were designed based on induction electromagnetic coupling and can provide an output current up to 1A at 5 V. The proposed powering strategy was verified using a vehicle tire simulator model to emulate rotational motion. A voltage and current sensor module as well microcontroller and data logger modules were utilized as the load for the developed WPT system. The verification experimental and preliminary test results reveal that the proposed strategy can provide constant power to the load (in this case, the voltage is around 4.3 V and the current is around 21.1 mA) although the vehicle tire model was rotated at different speeds from 0 rpm to 800 rpm. The proposed system has the potential and feasibility for implementation in tire sensor power applications in the intelligent-tire system. Full article
(This article belongs to the Special Issue Wireless Power Transfer Technology: Current Situation and Future Perspectives)
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14 pages, 495 KiB  
Article
Gain Expressions for Capacitive Wireless Power Transfer with One Electric Field Repeater
by Ben Minnaert, Giuseppina Monti, Alessandra Costanzo and Mauro Mongiardo
Electronics 2021, 10(6), 723; https://doi.org/10.3390/electronics10060723 - 18 Mar 2021
Cited by 4 | Viewed by 1722
Abstract
In this paper, the use of a repeater element between the transmitter and the receiver of a capacitive wireless power transfer system for achieving larger transfer distances is analyzed. A network formalism is adopted and the performance described by using the three power [...] Read more.
In this paper, the use of a repeater element between the transmitter and the receiver of a capacitive wireless power transfer system for achieving larger transfer distances is analyzed. A network formalism is adopted and the performance described by using the three power gains usually adopted in the context of two-port active networks. The analytical expressions of the gains as function of the network elements are derived. Assuming that the parameters of the link are given and fixed, including the coupling factors between transmitter, repeater and receiver, the conditions for maximizing the different gains by acting on the network terminating impedances (i.e., load and internal source conductance) are determined. The analytical formulas are verified through circuital simulations. Full article
(This article belongs to the Special Issue Wireless Power Transfer Technology: Current Situation and Future Perspectives)
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15 pages, 6812 KiB  
Article
A Multireceiver Wireless Power Supply System with Power Equalization in Stereoscopic Space
by Bin Shi, Feng Wen and Xiaohu Chu
Electronics 2021, 10(6), 713; https://doi.org/10.3390/electronics10060713 - 18 Mar 2021
Cited by 3 | Viewed by 1526
Abstract
With the rapid development of wireless power transfer (WPT) technology, the traditional single-transceiver WPT system has become more and more advanced; however, it is still difficult to meet its extensive application requirements. Aiming at the wireless charging of mobile phones in public places, [...] Read more.
With the rapid development of wireless power transfer (WPT) technology, the traditional single-transceiver WPT system has become more and more advanced; however, it is still difficult to meet its extensive application requirements. Aiming at the wireless charging of mobile phones in public places, electric vehicles (EVs) in multistorey garages, and electronic shelf labels (ESLs) in supermarket merchandise shelves, a multireceiver wireless power supply system with power equalization is proposed. The condition of power equalization is derived according to the equivalent circuit of the proposed WPT system, and the received power can be equally maintained by adjusting the transceiver loop resistance when the total load number or transmission distance changes. A simulation model is established to evaluate the electromagnetic environment of the proposed WPT system, and the results comply with the electromagnetic safety of the ICNIRP-2018 guidelines. Finally, the experimental results show that the power differential rate that meets the power equalization condition is 13 to 17% lower than that of the unsatisfied rate, which verifies the effectiveness of the proposed system in terms of power equalization. Full article
(This article belongs to the Special Issue Wireless Power Transfer Technology: Current Situation and Future Perspectives)
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