Abstract
The power transfer efficiency of magnetic-resonance coupled wireless power transfer (WPT) systems is sensitive to the alignment of coils. In this paper, a novel multi-coil WPT system is proposed to enhance power transfer efficiency. It can overcome the misalignment problem and maintain high power transfer efficiency. The proposed coil loop structure can provide a strong magnetic resonance coupling between the Tx and Rx coils. There are four induvial resonators applied in the system and it demonstrates that at least a pair of coupled resonators in several misaligned conditions could realize high power transfer efficiency over a misaligned distance. The experimental results show that the proposed multi-loop WPT system can achieve 90.2% peak efficiency when the coils are well aligned. Mean-while, this WPT system maintains over 70% efficiency over a misalignment distance from 0 to 55 mm, which is about 66% of the length of the Rx board. The proposed WPT system could be used either in implant devices for biomedical healthcare and treatment or for electric vehicles charging systems.
| Original language | English |
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| Title of host publication | 2018 IEEE MTT-S International Wireless Symposium (IWS) |
| Publisher | IEEE |
| ISBN (Electronic) | 9781538663462 |
| DOIs | |
| Publication status | Published - 2 Jul 2018 |
| Event | 2018 IEEE MTT-S International Wireless Symposium - Chengdu, China Duration: 6 May 2018 → 10 May 2018 |
Conference
| Conference | 2018 IEEE MTT-S International Wireless Symposium |
|---|---|
| Abbreviated title | IWS 2018 |
| Country/Territory | China |
| City | Chengdu |
| Period | 6/05/18 → 10/05/18 |