Next Article in Journal
A Study on Ceiling Temperature Distribution and Critical Exhaust Volumetric Flow Rate in a Long-Distance Subway Tunnel Fire with a Two-Point Extraction Ventilation System
Next Article in Special Issue
Magnetic Field during Wireless Charging in an Electric Vehicle According to Standard SAE J2954
Previous Article in Journal
A Decision-making Model for Corrective Maintenance of Offshore Wind Turbines Considering Uncertainties
Previous Article in Special Issue
Integrated Control Strategy for Inductive Power Transfer Systems with Primary-Side LCC Network for Load-Average Efficiency Improvement
Article Menu
Issue 8 (April-2) cover image

Export Article

Open AccessArticle

A Compact Spatial Free-Positioning Wireless Charging System for Consumer Electronics Using a Three-Dimensional Transmitting Coil

1
National Active Distribution Network Technology Research Center, School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
2
Department of Electrical & Computer Engineering, San Diego State University, San Diego, CA 92182, USA
3
Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing Jiaotong University, Beijing 100044, China
4
Shenzhen Precise Testing Technology Co., Ltd, Shenzhen 518000, China
5
School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
*
Author to whom correspondence should be addressed.
Energies 2019, 12(8), 1409; https://doi.org/10.3390/en12081409
Received: 11 March 2019 / Revised: 4 April 2019 / Accepted: 10 April 2019 / Published: 12 April 2019
(This article belongs to the Special Issue Wireless Power for Electric Vehicles)
  |  
PDF [3238 KB, uploaded 12 April 2019]
  |  

Abstract

A compact spatial free-positioning wireless charging system with a novel three-dimensional (3D) transmitting (Tx) coil is proposed to charge consumer electronics in the working area. Because of the strengthened electromagnetic field generated by the proposed 3D Tx coil in the space, this system can charge consumer electronics wirelessly with great tolerance to positional and angular misalignments between the transmitter and receiver. Benefiting from the compact design of the 3D Tx coil, the system can be easily embedded in some corners of office furniture/cubic panels, which will not cause any extra working space consumption when charging devices. The inductor-capacitor-capacitor (LCC) compensation circuit on the Tx side can achieve constant current output, which is independent of load condition and can protect the transmitter. With the LCC compensation circuit, the MOSFETs of the H-bridge high-frequency inverter realized zero voltage switching (ZVS). The small-sized planar receiving (Rx) coil and series (S) compensation circuit is applied to achieve compact receiver design. The theoretical and experimental results show that the spatial free-positioning wireless charging prototype can transfer 5 W to the small-sized receiver in around 350 mm × 225 mm × 200 mm 3D charging area and achieve the highest efficiency of 77.9%. View Full-Text
Keywords: compact embedded design; spatial free-positioning wireless charging system; three-dimensional (3D) transmitting (Tx) coil; inductor–capacitor–capacitor and series (LCC-S) compact embedded design; spatial free-positioning wireless charging system; three-dimensional (3D) transmitting (Tx) coil; inductor–capacitor–capacitor and series (LCC-S)
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Liang, Z.; Wang, J.; Zhang, Y.; Jiang, J.; Yan, Z.; Mi, C. A Compact Spatial Free-Positioning Wireless Charging System for Consumer Electronics Using a Three-Dimensional Transmitting Coil. Energies 2019, 12, 1409.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top