AUV(Autonomous underwater vehicles) 運行於海水水域內執行任務，因各水域海水電導率並不相同，實驗研究電能傳輸系統在不同電導率海水的傳能結果，而非接觸式電能傳輸系統調整在最佳諧振點時，會因為負載變化，或耦合結構中間介質的變化，使得反射阻抗改變，造成等效電抗感值基礎參數改變，令電抗沒辦法完全抵消，造成LC諧振點偏移，並利用鎖相追頻電路，使系統處於電抗抵消的情況，來維持系統最大基頻電流，以提高系統傳能，最後實驗量測結果，最高電能傳輸效率在空氣中為74.50%，在電導度34.8 mS/cm海水中為73.95%，在電導度49.7 mS/cm海水中為73.17%。

AUVs are used for underwater tasks. Because the conductivity of the seawater is different in each water area, the experiment studies for the power transfer system in different conductivity of the seawater. When the resonance point, or the intermediate medium of the coupling structure changes, the basic parameters of the equivalent reactance value changed due to the reflection impedence. Because the reactance cannot be completely canceled, causing the LC resonance point to shift. In order to solve the problem above, we use the phase-locked loop circuit. The frequency chasing circuit makes the system in the case of reactance cancellation to maintain the maximum fundamental current of the system to improve the power transmission of the system. Finally, the experimental measurement results, the highest power transmission efficiency is 74.50% in the air, and the electrical conductivity is 34.8 mS/cm. It is 73.95% in the seawater and 73.17% in the seawater with an electrical conductivity of 49.7 mS/cm.

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