本文提出一部三繞組感應式功率傳輸系統的研製。主電路分為兩級，前級為全橋串聯諧振轉換器，利用串聯諧振電路達到零電壓切換，減少切換損失，提升效率。後級採用降壓式轉換器，調整功率元件的責任週期，藉以改變輸出的電壓或電流，達到定電壓或定電流的輸出。
文中繞製三個圓盤型繞組，包括一次側及二次側的耦合繞組以及第三側的中間繞組，透過磁場耦合的方式達成感應式功率傳輸，藉由第三繞組，提升耦合能力，因此不需使用磁芯。
本文使用德州儀器公司所生產的TMS320F2808數位信號處理器，作為控制核心，執行預測型控制法則，藉由調控權重因子得到比傳統比例積分器更佳的動態性能。
最後，文中研製一套輸入電壓為直流220V，輸出電壓為直流130V，輸出功率為2kW的感應式功率轉換器。實測結果說明，本文所研製的系統在一、二次側繞組距離為20公分時，滿載轉換效率約可達到88%，本文所提的三繞組感應式功率傳輸系統，具有比雙繞組感應式功率傳輸系統更長的傳輸距離。相關的成果，未來可推廣作為電動汽、機車的感應式充電器。

This thesis proposes the design and implementation of three-winding inductive power transfer systems. The main circuit of the power transfer system includes two stages. The first stage is a full-bridge series resonant converter, which uses a series resonant circuit to reach zero voltage switching and then reduces the switching loss and increases efficiency. The second stage uses a buck converter to regulate the duty cycle of the power device to adjust the output voltage or output current, and achieves a constant voltage output or a constant current output.
Three panel windings are implemented. The windings include a primary winding, a secondary winding, and a third winding that is a short- circuited winding. By using this proposed method, no core is reguired.
A digital signal processor, TMS320F2808, made by Texas Instrument, is used to execute the predictive controller algorithms. By adjusting the weighting factor, the predictive controller provides better performance than the PI controller.
Finally, an inductive power transfer system, which has DC 220V input, DC 130V output, rated power 2kW, has been implemented. Experimental results show the proposed inductive power transfer system can provide 88% efficiency at a 20cm distance between the primary winding and the secondary winding. In addition, the proposed three-winding inductive power transfer system can have a longer air gap than the traditional two-winding inductive power transfer system. The results of the proposed inductive power transfer system could be extended as an inductive power transfer system for electric vehicles and electric motorcycles.

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