中文摘要：

传统的电动汽车无线充电技术存在停车后充电、单次充电时间长、充电频繁等问题，严重影响电动汽车的续航里程。为此，该文重点研究一种基于多初级绕组并联方式的电动汽车公路式动态无线充电方法，利用分段导轨实现对行驶中电动汽车无线供电。首先，利用互感耦合模型对初级绕组并联耦合机构进行电路拓扑分析；其次，通过仿真分析获取所述耦合机构在能量传输过程中的物理特性及磁场强度分布特性；最后，研究了一种基于磁场强度检测的接收端定位方法，通过三轴磁传感器测量行驶方向的磁场强度，实现次级绕组的实时精确定位，测量周期为6 ms，分辨率为5 mGs。仿真和实验结果表明，所述磁耦合机构与传统单初级/次级绕组串并补偿结构相比，由于边界磁场强度增大，输出功率提高25%，传输效率提高7%。

英文摘要：

The conventional wireless charging technology for electric vehicles （EV） has the disadvantages of non-running charging, long charging time and frequent charging, etc. To solve the above problems, a novel wireless power transfer （WPT） for road-embedded running EV charging using multi-parallel primary coils is proposed in this paper. Firstly, a coupling model is utilized to analyze the circuit topology of this proposed coupling structure. Then, electromagnetic field simulation is done to obtain the physical characteristics and the magnetic field distribution of energy transfer process, respectively. Finally, a three-axis magnetic sensor is employed to locate the secondary coil by detecting the magnetic field intensity in the EV running direction. Both simulation and experimental results demonstrate that the proposed strategy can improve the output power by 25% and transfer efficiency by 7%, compared with the traditional single Tx/Rx circuits in the primary series and secondary parallel structure.