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一种双初级线圈并绕的感应电能传输系统及其功率分配方法

DOI: 10.13334/j.0258-8013.pcsee.2015.17.021, PP. 4454-4460

Keywords: 感应电能传输,双初级线圈,功率分配,大功率

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Abstract:

传统的感应电能传输(inductivepowertransfer,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1.4kW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。

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