應用於攜帶式電子設備之通用型非接觸式充電平台

Design of an universal contactless charging platform for portable devices

鄧涵中(Han-Chung Teng)

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(2012年)

https://doi.org/10.6841/NTUT.2012.00525

摘要

本論文以無線功率傳輸原理設計一非接觸式充電平台，將可對行動電話或其他電子裝置進行充電。充電平台和電子裝置間是採用電磁感應方式耦合，並藉由繞線式線圈達到非接觸式功率傳輸，充電平台使用霍爾元件及磁簧開關來達到低待機功率損耗。
本篇論文首先比較感應線圈各參數對於磁場分布之影響，歸納出最佳的陣列線圈結構，並以此原則設計的線圈作為單位陣列線圈，再以此線圈為基準並延伸形成陣列結構。別於以往的非接觸式充電系統，本論文之陣列結構除了保有原系統的傳輸效率之外並能夠提升電子設備擺放之範圍，也能提升電子產品在使用上之便利性。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。次級側最大輸出功率可達1.6W，最大傳輸效率為41%，且次級線圈平行位移6mm內，其傳輸效率仍可維持在40%左右。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 ； 陣列線圈結構

並列摘要

This thesis proposes an universal contactless charging platform, which allowed cell-phone or other mobile devices placed and charged. By wound-wire structure and magnetic coupling, wireless power transmission could be achieved between platform and mobile device. The Hall-sensor and reed switch is used to achieve low standby power consumption in the charging system.
This thesis started from the parameters of induction coil for the magnetic field distribution, and optimize the design principal. With this principle, the coil could be designed as an unit array coil, and extended it to compose array structure. Different from the other contactless charger, array structure not only enhance the sensing range but also increase the use of convenience. The experimental results show that the output voltage is 5V when the induction coil gap is 2mm and displacement is 0mm. The maximum power output is 1.6W and a maximum transmission efficiency of 41%. The transmission efficiency maintained above 40%, when the secondary coil displacement less than 6mm. 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 ； array structure

參考文獻

參考文獻

[1] Y. Jang and M. M. Jovanovic, “A contactless electrical energy transmission system for portable-telephone battery chargers,” IEEE Trans. Ind. Electron., vol. 50, no. 3, pp. 520-527, Jun. 2003.

[2] B. Choi, H. Cha, J. Noh, and Sangkyu Park, “A new contactless battery charger for portable telecommunication/compurng electronics,” in Proc. Int. Conf. Consumer Electron., Piscataway, Jun. 2001, pp. 58-59.

[3] H. L. Li , A. P. Hu, G. A. Covic, and C. S. Tang, “A new primary power regulation method for contactless power transfer,” in Proc. Int. Conf. Industrial Technology, Gippsland, Feb. 2009, pp. 1-5.

[4] C. J. Chen, T. H. Chu, C. L. Lin, and Z. C. Jou, “A study of loosely coupled coils for wireless power transfer,” IEEE Trans. Circuits Syst., vol. 57, no. 7, pp. 536-540. Jul. 2010.