非接觸式充電平台應用於行動裝置之研究

Study of contactless charging platform for mobile devices

李正男(Cheng-Nan Li)

指導教授 ： 孫卓勳

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2011年)

https://doi.org/10.6841/NTUT.2011.00174

摘要

本論文提出一種通用的非接觸式充電平台，可同時對兩種不同類型的行動裝置充電，充電平台的大小為114mm x 110mm x 22mm。充電平台和行動裝置之間是採用電磁感應方式來達到無線功率傳輸。非接觸式充電系統的感應結構是使用印刷電路板(Printed Circuit Board；PCB)線圈來製作，有效減少感應線圈的體積和厚度。充電平台使用磁簧開關來達到零待機功率損耗。經由實測驗證，當感應線圈間隙等於2mm且平行位移等於0mm時，次級側經由電壓調整電路輸出直流電壓為穩定5V。當次級側負載等於25Ω時，最大輸出功率可達1W，最大傳輸效率為24.2%。當次級線圈平行位移4mm內，其傳輸效率可維持在20%以上。最後可透過設計適當的次級側電路，以滿足不同行動裝置的充電需求。

關鍵字

非接觸式充電平台 ； 無線功率傳輸 ； 印刷電路板線圈

並列摘要

This thesis proposes a universal contactless charging platform, which allowed two mobile devices placed and charged simultaneously. The size of charging platform is 114mm x 110mm x 22mm. By using electromagnetic induction, it could achieve wireless power transmission between charging platform and mobile device. The induction coil of the contactless charging platform is made of printed circuit board coil with minified coil size and circuit volume. The reed switch is used to achieve zero standby power consumption in the charging system. The experimental results show that the output regulated dc voltage of the secondary-side circuit is 5V, when the induction coil gap is 2mm and displacement is 0mm. The secondary-side circuit has a maximum output power of 1W and a maximum transmission efficiency of 24.2%, with a load impedance of 25Ω. The transmission efficiency maintained above 20%, when the secondary coil displacement less than 4mm. By designing appropriate secondary-side circuits to meet the charging requirements of different types of mobile device.

並列關鍵字

contactless charging platform ； wireless power transmission ； printed circuit board (PCB) coil

參考文獻

[32] D. K. Cheng, Field and Wave Electromagnetics (Second Edition), Addison-Wesley, United States of America, 1989.

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