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Optimisation design for series–series dynamic WPT system maintaining stable transfer power

机译：串联动态WPT系统保持稳定传输功率的优化设计

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摘要

In amount of practical applications of wireless power transfer (WPT), charging electric vehicles (EVs) has attracted much attention. Dynamic WPT is considered as a solution to the problem of battery bottleneck and the difficulty of convenient charging encountered in the development of EV. However, the transfer power can hardly be maintained stable under large coil misalignment in movement. What is more, the transfer efficiency will decline correspondingly. A method of optimisation design is presented from the perspective of against misalignment for dynamic series-series (SS) WPT system. The primary compensation capacitance is well designed to regulate transfer power fluctuation in WPT system. Then the optimal load is matched by DC-DC converter to guarantee the highest average transfer efficiency. A secondary-only resonant SS WPT system with fixed frequency is finally built. The power transfer profile is smooth against coupling coefficient to realise high tolerance to position as the power drop (raise) percentage is no more than 10% (20%) within 200% variation of coupling coefficient for different loads. Meanwhile, the efficiency can always be maintained at a high level.
机译：在无线电力传输（WPT）的实际应用中，电动汽车（EV）的充电备受关注。动态WPT被认为是解决电动汽车发展过程中电池瓶颈和方便充电的难题。但是，在运动中的大的线圈未对准的情况下，难以保持稳定的转印功率。而且，传输效率也会相应下降。从动态序列系列（WPT）系统的不对准角度出发，提出了一种优化设计方法。初级补偿电容经过精心设计，可调节WPT系统中的传输功率波动。然后，最佳负载通过DC-DC转换器进行匹配，以确保最高的平均传输效率。最终构建了具有固定频率的仅次级谐振SS WPT系统。功率传递曲线相对于耦合系数是平滑的，以实现对位置的高容忍度，因为在不同负载的耦合系数变化200％内，功率下降（上升）百分比不超过10％（20％）。同时，效率总是可以保持在较高水平。

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  • 来源
    《Power Electronics, IET》 |2017年第9期|987-995|共9页
  • 作者

    Shengming Wang; Junfeng Chen; Zhaoyang Hu; CanCan Rong; Minghai Liu;

  • 作者单位

    Huazhong University of Science and Technology, Institute of Fusion and Plasma Research, People's Republic of China;

    Huazhong University of Science and Technology, Institute of Fusion and Plasma Research, People's Republic of China;

    Huazhong University of Science and Technology, Institute of Fusion and Plasma Research, People's Republic of China;

    Huazhong University of Science and Technology, Institute of Fusion and Plasma Research, People's Republic of China;

    Huazhong University of Science and Technology, Institute of Fusion and Plasma Research, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    capacitance; coils; DC-DC power convertors; electric vehicle charging; inductive power transmission; optimisation;

    机译：电容;线圈;DC-DC电源转换器;电动汽车充电;感应式电力传输;优化;

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