本文使用磁場耦合與電場耦合的方式將能量穿越方形金屬管之無線電力傳輸，利用銅箔與絕緣膠帶在方形金屬管上形成兩薄膜電容器，兩薄膜電容所產生的電場讓電流流經金屬管壁，兩薄膜電容之間金屬管壁視為磁場耦合的初級側繞組，並在管內依據耦合磁場面積配置一個高導磁接收線圈作為二次側繞組。主電路為全橋相移式與串聯-串聯諧振轉換器所組成之電路架構。
文中分別採用方形不鏽鋼管與方形鐵管作為硬體架構並進行比較，在使用方形不鏽鋼管作為硬體架構時，電流會因集膚效應的影響導致分布在方形不鏽鋼管的轉角處，使得接收線圈不易設計，本文使用方形鐵管作為硬體架構時，可改善電流集中在轉角處的問題，且接收線圈可以在方型鐵管的平面處得到較大的功率。
為了考慮高頻集膚效應對兩種方形金屬管的電流分布，本研究使用ANSYS Maxwell模擬軟體建立3D模型用以分析，並利用MATLAB/SIMULINK系統電路進行模擬。最終電路實測使用數位訊號處理器（TMS320F28069）作為控制核心，並具有共振頻率追蹤的功能，透過模擬與實驗驗證本文提出之方法可行性，結果將於本論文中呈現。

This thesis used a wireless method to transfer electrical power across a square metal tube by combining with magnetic field coupling and electric field coupling. Two film-type capacitors on the square metal tube are set up by two copper foils with isolating layers. The electric field generated by the capacitors provides current path to flow between the two film capacitors through the wall of the metal tube. The wall of the metal tube between the two film capacitors acts as the primary winding of a coupling inductor. According to the area of the coupled magnetic field, a secondary winding receiving coil with high-permeability core was deployed inside the tube. The electric power received by the secondary winding is harvested by the main circuit which consists of a phase-shifted H-bridge converter and a series- series resonant circuit.
Both square stainless steel tube and square iron tube were investigated in this thesis. For square stainless steel tube, it is found that the current which flows along the wall will concentrate at the corner part of the tube due to skin effect. This phenomenon is inconvenient for the design of receiving coil. This study also found that the current distribution of the iron tube is more evenly than stainless steel tube. In addition, more power can be transferred to receiving coil.
In order to consider the high-frequency skin effect, this thesis established a 3D model to analyze the current distribution of both metal tubes by ANSYS Maxwell software. Moreover, the proposed system was simulated by using MATLAB/SIMULINK software. This thesis used a digital signal processor (TMS320F28069) as controller with automatic resonant frequency tracking. Both simulation and experimental results showed the correction and validity of the proposed scheme.

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