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首页> 外文期刊>Power Electronics, IET >Primary topology selection and conversion in short-segmented on-road charging system for electrical vehicles
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Primary topology selection and conversion in short-segmented on-road charging system for electrical vehicles

机译：电动汽车短分段道路充电系统中的主要拓扑选择和转换

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摘要

In an on-road charging system for electric vehicles where short-segmented primary coils are energised one by one, a serious power slump occurs when a secondary coil is placed in the middle of two primary coils. This issue can be tackled by powering double segmented primary coils simultaneously. First, four circuit topologies are established based on different connections of double primary coils. Then, a method of flux linkage superposition is utilised to identify two effective topologies. Forward series connection topology is further identified as an optimal selection based on performance comparison. In addition, topology conversion points are figured out after a comparison between the curve of received power in the single primary coil model and that in the double primary coil model. Afterwards, the topology conversion strategy, that is conversion of primary circuit topologies and adjustment of source frequency, is proposed to restrain the power slump. Finally, experiments are carried out to verify the theoretical analysis including primary topology selection and conversion strategy. Results show that with the application of the topology conversion strategy, the received power rises from 9.6 to 18.7 W when the secondary coil is located in the middle of the two primary coils.
机译：在用于电动汽车的道路充电系统中，短节段的初级线圈被一个一个地激励，当次级线圈置于两个初级线圈的中间时，会发生严重的功率下降。可以通过同时给双段式初级线圈供电来解决此问题。首先，基于双初级线圈的不同连接建立了四个电路拓扑。然后，使用磁链叠加的方法来识别两种有效的拓扑。基于性能比较，将前向串联连接拓扑进一步确定为最佳选择。此外，在单初级线圈模型和双初级线圈模型中的接收功率曲线进行比较之后，得出拓扑转换点。然后，提出了一种拓扑转换策略，即一次电路拓扑的转换和源频率的调整，以抑制功率损耗。最后，进行实验以验证理论分析，包括主要的拓扑选择和转换策略。结果表明，通过拓扑转换策略的应用，当次级线圈位于两个初级线圈的中间时，接收功率从9.6 W上升到18.7W。

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