中文摘要：

传统的感应电能传输（inductive power transfer，IPT）系统只含有单个逆变电源与单个初级线圈，由于受到功率器件的容量限制，较难满足轨道交通非接触供电等大功率应用的要求。为增加IPT系统的输出功率，该文构建了基于双初级线圈并绕的IPT系统，通过初级线圈产生磁场的叠加，实现IPT系统大功率输出。利用互感耦合理论对此系统进行详细分析，发现此结构不但需要补偿各初级线圈的自感，而且还需要额外电容补偿两初级线圈间的互感。研究表明，通过选择合适的额外补偿电容值，不仅能使各逆变器工作在谐振状态，还可以有效分配两逆变器的输出功率，达到合理分配两逆变器输出容量的目的。建立输出总功率为1.4 kW的实验系统，验证了两逆变器输出功率比为1：1和1：2的工况。这种基于双初级线圈并绕的IPT系统具有结构简单等优点，可望在轨道交通非接触供电系统等大功率场合中得到应用。

英文摘要：

The power capacity of the single-phase H-bridge inverter and single primary coil used in the traditional inductive power transfer （IPT） systems is limited by the constraint of the power electronic devices,so that it may not be able to meet the high-power requirement of rail transit applications. A novel IPT system with dual parallel wound primary coils is proposed in this paper to enhance the system’s power capacity, and each primary coil is equipped with a high-frequency inverter. After analyzing the circuit topology of this proposed structure by coupling model in detailed, it is released that this structure not only needs capacitors to compensate the coil’s self-induction, but also needs additional capacitors to compensate the equivalent reactance caused by another primary coil. By choosing appropriate additional compensation capacitances, effective output power allocation of two inverters is achieved. Finally, an experimental setup of total power output of 1.4 kW is employed to verify the output power ratio of 1：1 and 1：2. The result shows that the proposed system is validated.The IPT system based on dual parallel wound primary coil is prospected to be applied in the rail transit contactless power supply system.