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| Content Provider | IET Digital Library |
|---|---|
| Author | Zhang, Wei Zhang, Tengyuan Guo, Qiuquan Shao, Lingmin Zhang, Naibo Jin, Xiangliang Yang, Jun |
| Abstract | Wireless power transfer (WPT) has become increasingly widespread in recent years, ranging from electric vehicles, portable consumer electronics, and implantable biomedical devices to flexible/stretchable electronics. The authors here present a WPT system based on the maximum efficiency design principle. Utilising the properties of Helmholtz coils, a near-uniform 3D volume electromagnetic field is generated making it possible to transfer power to multiple devices simultaneously with no requirement of orientation and/or alignment. The system can also provide continuous wireless power to multiple devices even when they are moving, with an efficiency of up to 87%. An automatic frequency tracing technique was developed to compensate for the resonant frequency shifting issue encountered when the number of loadings changes. Meanwhile, a multi-load decoupling control system was also developed, such that each secondary coil receives consistent energy without being affected by the addition or removal of another receiving coil(s). As a proof of concept, the authors successfully charged various numbers of mobile phones simultaneously and transmitted power to single/multiple moving devices wirelessly. |
| Starting Page | 658 |
| Ending Page | 665 |
| Page Count | 8 |
| ISSN | 17518660 |
| Volume Number | 12 |
| e-ISSN | 17518679 |
| Issue Number | Issue 5, May (2018) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-epa/12/5 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2017.0581 |
| Journal | IET Electric Power Applications |
| Publisher Date | 2018-02-22 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | 3D Unstationary Free-positioning Automatic Frequency Tracing Technique Continuous Wireless Power Electric Vehicle Electromagnetic Field Flexible-stretchable Electronics Helmholtz Coils High-efficiency Wireless Power Transfer System Implantable Biomedical Device Inductive Power Transmission Maximum Efficiency Design Principle Mobile Phones Multiload Decoupling Control System Multiobject Charging Multiple Moving Device Near-uniform 3D Volume Electromagnetic Field Portable Consumer Electronics Radio Frequency Power Transmission Receiving Coil Resonant Frequency Secondary Coil WPT System |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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