This paper presents a multi-objective design method of underwater wireless power transfer (UWPT) system for autonomous underwater vehicles (AUV) based on the cooperative design of compensation network and a DC/DC converter, considering seawater eddy current loss. Firstly, the electromagnetic field model of the underwater coil is established based on the non-axisymmetric model, and the analysis method of eddy current loss is given. Then, according to the circuit model with seawater eddy current loss, a two-port network including a compensation network and coil coupling model, is established. The cooperative design method of compensation network and DC/DC converter is presented to improve the efficiency of the UWPT system and reduce the electrical stress of the inverter, considering seawater eddy current loss. Finally, a 1 kW AUV UWPT system prototype is built. The experimental results prove that the proposed seawater eddy current loss analysis method is effective. The experimental results also show that the proposed compensation network and DC / DC converter duty cycle design method can achieve the purpose of constant voltage output, optimization of system efficiency, reduction of inverter electrical stress and inverter zero-voltage-switch.

基于补偿网络和DC / DC变换器的协同设计，考虑了海水涡流损耗，提出了一种自动水下机器人（AUV）水下无线功率传输（UWPT）系统的多目标设计方法。首先，基于非轴对称模型，建立了水下线圈的电磁场模型，给出了涡流损耗的分析方法。然后，根据海水涡流损耗的电路模型，建立了包括补偿网络和线圈耦合模型的两端口网络。针对海水涡流损失，提出了补偿网络与DC / DC变换器的协同设计方法，以提高UWPT系统的效率，降低逆变器的电应力。最后，建造了一个1 kW的AUV UWPT系统原型。实验结果证明了所提出的海水涡流损失分析方法是有效的。实验结果还表明，提出的补偿网络和DC / DC变换器占空比设计方法可以达到恒压输出，优化系统效率，降低逆变器电应力和逆变器零电压开关的目的。