中文摘要：

针对电动汽车无线充电技术中充电电池体积大、充电时间长、续航能力不足等问题,本文提出了一套发射线圈可选择性开断的电动汽车动态充电方案。该方案基于近场谐振式无线电能传输原理,对发射线路和接收线路耦合结构进行研究。通过数学模型变换,探讨了系统电能传输效率关系,并对系统实验平台进行搭建,经过分析电动汽车动态充电过程,得出接收线路不同位置时线路耦合情况及系统传输效率变化规律。经过实验,得出在进一步改进线路结构后,系统电能传输效率平均提升18%,并在70%左右保持稳定趋势,满足实际应用需要。

英文摘要：

In view of the weakness of wireless charging technology in the application of electric car,such as too large volume of battery,long charging time and low mileage,the paper proposes a new charging design. The emission coil of the charging system is featured that it can selectively be connected and cut. Based on principle of near field electromagnetic resonance in the wireless transmission theory,the emission coil and receiving coil have been reconstructed. The efficiency of electric energy transmission is studied through mathematical model and an experimental platform is constructed. By the analysis of EV dynamic charging process,the relation between the coupling of circuits at different locations of the receiving circuit and the efficiency of transmission is obtained. The experiment shows that after the improvement of the circuit construction the power transmission efficiency of the system can be increased by an average of 18%,and can be maintained stably at about 70%,which meets the needs of practical application.