本論文主旨在以共振磁能傳輸為架構，將無線電力傳輸技術應用於可充電之行動裝置，並提出一無線充電系統。本系統以自動節能切換和二次側追蹤定位為主軸，結合單晶片和無線通訊模組做充電系統之控制與管理。無線充電系統在共振磁能之發射上只具有單一方向性，無法對其它方向之二次側待充物充電，本研究以此為考量利用紅外線具單一指向性和可反射性之性質並輔以步進馬達帶動一次側線圈旋轉，以對二次側追蹤定位，為了對不同距離遠近之二次側充電，系統採用自動節能功率切換方式，控制一次側開啟不同層級功率，並針對不同距離二次側供給不同大小之能量，以達節能之功效。本系統設計之自動功率切換開啟層級分為三級，傳輸效率最大為19.86 %，二次側於 10 cm所接收之功率為 136.64 mW。為了達到最佳之定位效果，當二次側擺放於 20~140 ˚之範圍內時，定位誤差角度為 6 ˚以內。

This research based on the structure of resonance magnetic field energy transmission proposes a wireless charging system applied in portable electronic devices. The system focuses on power saving and secondary locating. Furthermore, it also combines the microcontroller and wireless communication module for charging system control and management. Due to the reason of single orientation, the wireless charging system can not charge devices in other directions. As a result, the system adopts infrared and step motor in the primary coil to locate the secondary device. For different charging distances, the system makes use of auto power saving to control the levels of primary power. The function of power scaling in the system can be divided into three levels. Each level can provide proper energy for the secondary devices at different positions. The maximum power efficiency is 19.86 %, and the secondary receiving power is 136.64 mW at 10 cm. Besides, in order to achieve the optimal performance of the locating function, the secondary device is put in the range of 20 to 140 degrees, and the error of the locating function is below 6 degrees.

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