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首页> 外文期刊>Science, Measurement & Technology, IET >Numerical and experimental study of the effects of load and distance variation on wireless power transfer systems using magnetically coupled resonators
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Numerical and experimental study of the effects of load and distance variation on wireless power transfer systems using magnetically coupled resonators

机译：负载和距离变化对使用磁耦合谐振器的无线电力传输系统的影响的数值和实验研究

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This work investigates a series resonant circuit designed to wirelessly transfer power to charge an electrical vehicle battery. A typical approach assumes the load connected to the power transfer system to be constant and then the wireless link efficiency is studied. In practical engineering applications, however, the load and the distance between coils will vary and the efficiency may strongly depend on these variations. The efficiency will also be affected by the presence of massive conducting or shielding structures in the proximity of the wireless system. Here, the authors study these effects with the help of an equivalent circuit extracted from a full wave simulation and correlated with measured results. The authors demonstrate that by changing the load resistance the efficiency of the system can be improved, even for a large separation between the two magnetically coupled resonators; however, the maximum efficiency point may not correspond to the maximum power that can be handled by the system. They then analyse the primary and secondary voltages and currents in support of the above findings.
机译：这项工作研究了一种串联谐振电路，该电路设计用于无线传输功率以为电动汽车电池充电。一种典型方法是假设连接到电力传输系统的负载恒定，然后研究无线链路效率。然而，在实际工程应用中，负载和线圈之间的距离将变化，效率可能强烈取决于这些变化。效率还将受到无线系统附近大量导电或屏蔽结构的影响。在这里，作者借助于从全波仿真中提取并与测量结果相关的等效电路来研究这些影响。作者证明，通过改变负载电阻，即使两个磁耦合谐振器之间的间隔较大，也可以提高系统的效率。但是，最大效率点可能不对应于系统可以处理的最大功率。然后他们分析一次和二次电压和电流以支持上述发现。

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