本文旨在研發一非接觸式充電系統，並以磷酸鋰鐵電池作為系統負載，於非接觸式主電力電路部分，考量其漏磁通現象將較傳統緊密耦合變壓器嚴重，係於兩側線圈加入補償電容，並利用阻抗匹配與諧振原理，提升系統效能。同時經由互感等效模型建立，推導系統輸出電壓公式，並統整一套設計流程，可依所需之系統規格參數，完成線圈設計。最後為使磷酸鋰鐵電池負載可於快速安全情況下完成充電，本文於非接觸系統輸出端，加入充電控制電路調整充電電壓與電流，同時經由電池特性之探討，擬訂合適之充電策略，並利用單晶片程式撰寫實現所需之充電控制。而為驗證所提方法之可行性，本文已完成電路實作及進行實際量測，測試結果與推導之數學式計算結果相近，且系統可於既定之輸出功率情況下，達成滿意之傳輸效率，並使電池容量符合飽電率要求，測試結果應有助於證實本文所提之設計方法，兼以具備實作研製參考價值。

This thesis is aimed to design a contactless charging system for lithium iron phosphate battery. Compared to the traditional tightly coupled transformer, the flux-leakage phenomenon is found to be more serious in the contactless transformer, resulting in lower electric power transmission efficiency. In view of this drawback along with the consideration of impedance matching and circuit resonance, the proposed method adds compensation capacitors in two sides of coil such that the voltage drop caused by the leakage inductance can be more effectively eliminated. Meanwhile, the formulas for system output voltage based on the mutual inductance circuit model is derived, which is beneficial to form a systematic design procedure to accomplish the coil windings to satisfy the system specification requirements. Then, in order to charge the battery module under fast and safe conditions, a charging control circuit is also cascaded to regulate the charging voltage and current, by which the charging strategy is well developed and realized by the single-chip programming. To verify the feasibility of the proposed method, a prototype circuit has been established and tested. Experimental results of the overall system show that the output voltage is well matched with the derived equations, while the power transmission achieves a satisfactory efficiency on rated output power. The discharging capacity also reaches the required battery capacity as well. These testing results help to confirm the proposed design method and could be a useful reference for the related system design.

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