Submit to Special Issue Submit Abstract to Special Issue Review for Energies Propose a Special Issue

Journal Browser

► Journal Browser

Wireless Charging Technology and Energy Management for Electronic and Electric Devices

Print Special Issue Flyer
Special Issue Editors
Special Issue Information
Keywords
Published Papers

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

Deadline for manuscript submissions: 19 June 2024 | Viewed by 3239

Share This Special Issue

Special Issue Editor

Dr. Jiafeng Zhou

E-Mail Website
Guest Editor

Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, UK
Interests: wireless power transfer; energy harvesting; RF devices; metamaterials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With more and more autonomous devices emerging in our daily life, such as self-driving cars, there is no reason why they still need to be recharged using wires with human involvement in the future. Wireless charging techniques have been rapidly developed over the last few years and are continuously evolving. For high-power applications, such as charging for electric vehicles, etc., improving efficiency and safety would be the priority. For mid-power applications, such as mobile phones and drones, flexibility and reliability would be the main considerations. For low-power applications, such as small sensors for the Internet of Things, it is important to receive or harvest sufficient energy for the operation of electronic devices.

The aim of this Special Issue is to report the latest theoretical, practical, and industrial progress on wireless charging for electric and electronic devices. The topics of interest include but are not limited to:

High-power wireless charging technologies for electric vehicles, electric bikes, etc.;
Mid-power wireless charging technologies for robots, drones, mobile phones, etc.;
Low-power wireless charging or energy harvesting technologies for medical devices, IoT sensors, etc.;
Design of magnetic coils and capacitive plates for wireless power transfer;
Design of resonators for resonance-based wireless power transfer;
Design of AC/DC (RF/DC) converters and DC/AC (DC/RF) inverters;
Design of power management systems for wireless charging;
Health and safety of wireless charging, such as foreign object detection and electromagnetic compatibility issues;
Simultaneous wireless information and power transfer (SWIPT).

Dr. Jiafeng Zhou
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. 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 charging
energy harvesting
WPT
EH
near field
far field
coupling
rectenna
backscatter
converter
inverter
power management

Published Papers (3 papers)

Download All Papers

Research

18 pages, 9361 KiB

Open AccessArticle

Design and Analysis of a Step-Up Multi-Port Converter Applicable for Energy Conversion in Photovoltaic Battery Systems

by Siyuan Shi, Song Xu, Wei Jiang and Seiji Hashimoto

Energies 2024, 17(1), 223; https://doi.org/10.3390/en17010223 - 31 Dec 2023

Viewed by 744

Abstract

Aiming at the problems of large power fluctuations and poor stability in photovoltaic and other new energy power generation systems, a step-up multiport converter (MPC) that can simultaneously connect low-voltage photovoltaic cells, batteries, and loads (independent loads or power grids) is proposed in this manuscript. According to the possible operating conditions of the system, the working principles are described in detail. Theoretical analysis based on different working modes is presented and a hybrid modulation control method including pulse width modulation (PWM) and phase shift modulation (PSM) are applied to realize energy transmission between photovoltaics, batteries, and power grids. A simulation model is built in the PSIM environment to validate each working state of the system and mode switching function. Experiments are carried out on an experimental platform using the dsPIC33FJ64GS606 digital microcontroller as the control center, and the experimental results successfully verify the system function and PWM + PSM control efficiency. Full article

(This article belongs to the Special Issue Wireless Charging Technology and Energy Management for Electronic and Electric Devices)

► Show Figures

Figure 1

22 pages, 4174 KiB

Open AccessFeature PaperArticle

Estimation of the Influence of the Coil Resistance on the Power and Efficiency of the WPT System

by Jacek Maciej Stankiewicz

Energies 2023, 16(17), 6210; https://doi.org/10.3390/en16176210 - 26 Aug 2023

Cited by 7 | Viewed by 1067

Abstract

This paper presents the results of an analysis of a low-power Wireless Power Transfer (WPT) system. The system consists of periodically distributed planar spiral coils that form the transmitting and receiving planes. An analytical and numerical analysis of the WPT system, over the frequency range from 100 to 1000 kHz, was carried out. A simpler and faster solution is the proposed use of an equivalent circuit represented by a single WPT cell. The influence of coil resistance changes on the power and efficiency of the WPT system was studied. This was obtained by changing the diameter of the wire from which the coils were wound. In addition, the size of the coil, the number of turns, and the distance between the two planes have changed. After a detailed analysis, the results showed that the highest efficiency values were obtained for a wire diameter of 200 μm, which means the lowest coil resistance. However, the lowest efficiency values were obtained for the smallest wire diameter, i.e., 100 µm, which means the highest coil resistance. In this case, the efficiency decreased by more than 40%. Based on the calculation results, it was also shown that it was better to accept the skin effect (efficiency decreased below 7%) than to reduce the wire diameter to eliminate it. Full article

(This article belongs to the Special Issue Wireless Charging Technology and Energy Management for Electronic and Electric Devices)

► Show Figures

Figure 1

17 pages, 3101 KiB

Open AccessArticle

Analysis of Simultaneous WPT in Ultra-Low-Power Systems with Multiple Resonating Planar Coils

by Jacek Maciej Stankiewicz, Adam Steckiewicz and Agnieszka Choroszucho

Energies 2023, 16(12), 4597; https://doi.org/10.3390/en16124597 - 8 Jun 2023

Viewed by 845

Abstract

This paper analyses the conceptual application of a wireless power transfer (WPT) system with multiple resonators supplying outdoor sensors using a mobile charger. The solution is based on the idea of using sensors, located in open space, to monitor environmental parameters. Instead of the typical two-coil WPT with a single charger, energy transfer is realized simultaneously, using a group of identical planar coils as transmitters and receivers connected to the independent power supply circuits of each sensor and microcontroller. By isolating these charged circuits, a higher reliability and powering flexibility of the weather station can be achieved. The concept of the proposed system was discussed, and it was proposed to include the main devices in it. A theoretical analysis was performed considering all mutual couplings and the skin effect; hence, the system is characterized by a matrix equation and sufficient formulae are given. The calculations were verified experimentally for different frequencies, two possible distances between the transmitters and receivers, and equivalent loads. Both the efficiency and load power are compared and discussed, showing that this solution can provide power to ultra-low-power devices, yet the efficiency must still be improved. At the small distance between the transmitting and receiving coils (5 mm), the maximum efficiency value was about 40%, with a load resistance of 10 Ω. By doubling the distance between the coils, the efficiency of the WPT system decreased by three times. Full article

(This article belongs to the Special Issue Wireless Charging Technology and Energy Management for Electronic and Electric Devices)

► Show Figures

Figure 1

Journal Menu

Journal Browser

Wireless Charging Technology and Energy Management for Electronic and Electric Devices

Share This Special Issue

Special Issue Editor

Special Issue Information

Keywords

Published Papers (3 papers)

Research

Further Information

Guidelines

MDPI Initiatives

Follow MDPI