水下无线电能传输系统建模与分析  

Modeling and analysis of underwater wireless power transmission system

作　　者：缪远杰 刘宁[1] 王海涛[1] 赵建锐[1] Miao Yuanjie;Liu Ning;Wang Haitao;Zhao Jianrui(National Ocean Technology Center,Tianjin 300112,China)

机构地区：[1]国家海洋技术中心,天津300112

出　　处：《国外电子测量技术》2021年第8期13-17,共5页Foreign Electronic Measurement Technology

基　　金：国家重点研发计划(2017YFF0208400)项目资助。

摘　　要：为了研究磁耦合谐振无线电能传输技术在海水中的传输损耗问题,在此提出一种海水等效电路模型,并对此模型推导得出系统的传输特性。通过对模型中线圈在海水和空气中等效辐射电阻分析对比,得出随着工作频率的提高,在空气中辐射电阻几乎忽略不计,而在海水传输过程中线圈的辐射电阻呈指数递增,传输频率的增加会导致系统的辐射电阻增加,系统的传输损耗增大。海水传输距离越大,等效电感越大,传输效率逐渐降低。仿真得出在海水中传输的最佳频率为50~250 kHz。在最佳频率范围内系统在海水传输过程中相比于空气、淡水中传输效率略微降低。最后通过试验搭建水下MCR-WPT系统与仿真对比验证此海水等效电路模型的正确性并且在传输距离35 mm下系统传输效率可达72.6%。In order to study the transmission loss of the magnetic coupling resonance wireless power system(MCR-WPT) in seawater, a seawater equivalent circuit model is proposed and the transmission characteristics of the system are derived from this model. Through the analysis of the equivalent radiation resistance in the model, it is concluded that the radiation resistance of the coil in seawater is mainly affected by the transmission frequency of the system. The increase of the transmission frequency will cause the radiation resistance of the system to increase, and the transmission loss of the system increases. The best frequency for transmission is 50~250 kHz. In the optimal frequency range, the transmission efficiency of the system during seawater transmission is slightly lower than that in air and fresh water. Finally, an underwater MCR-WPT system was built through experiments and compared with simulation to verify the correctness of this model, and the transmission efficiency of the system can reach 72.6% at a transmission distance of 35 mm.

关 键 词：水下无线电能传输 涡流损耗 传输频率 磁耦合谐振 电路模型 导电介质 

分 类 号：TM724[电气工程—电力系统及自动化]