A Bi-directional wireless power system with integrated magnetics
A Bi-directional wireless power system with integrated magnetics
复制标题
具有集成磁性的双向无线电源系统
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
P. Hu
中科院分区：
文献类型：
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作者：
Lei Zhao;D. Thrimawithana;U. Madawala;P. Hu
电动汽车（EV）作为未来的交通方式越来越受欢迎。电动汽车和公用电网之间的无线接口采用双向无线充电技术（BD-WPT），具有安全、方便和物理隔离等优点。然而，电动汽车中使用的 BD-WPT 系统的磁耦合器之间的物理错位是不可避免的，并且会导致关键参数的变化，从而显着增加损耗并影响功率吞吐量。本文提出了一种新的 BD-WPT 拓扑，其中 LCL 网络的串联电感器集成到磁耦合器中，以提高未对准情况下的系统性能。 DD 型和双极型集成磁性器件都被实现并进行了比较。开发了一个数学模型来研究系统参数变化的行为和敏感性。结果表明，与基准 LCL 调谐 BD-WPT 系统相比，当焊盘未对准时，所提出的系统可将功率吞吐量提高多达 20%。此外，所提出的具有双极垫的系统的效率为 95.5%，而具有 DD 垫的系统的效率稍低，为 93.5%
Electric vehicles (EVs) are becoming increasingly popular as a mean of future transportation. A wireless interface between EV and the utility grid, with a bi-directional wireless power technology (BD-WPT), has several advantages, such as safety, convenience and physical isolation. However, physical misalignment between the magnetic couplers of BD-WPT systems used in EVs are unavoidable and introduces variations in key parameters, thus, significantly increasing losses and affecting the power throughput. This paper proposes a new BD-WPT topology where the series inductors of the LCL networks are integrated in to the magnetic couplers to improve system performance under misalignment. Both DD and bi-polar type integrated magnetics are implemented and compared. A mathematical model is developed to investigate the behavior and the sensitivity to variation in parameters of the system. The results indicate that, in comparison to a benchmark LCL tuned BD-WPT system, proposed system results in up to 20% more in power throughput when pads are misaligned. Moreover, the proposed system with bi-polar pads has an efficiency of 95.5% while the system with DD pads has a slightly lower efficiency of 93.5%