Wireless Power Transfer System Adaptive to Change in Coil Separation
Wireless Power Transfer System Adaptive to Change in Coil Separation
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DOI：
10.1109/tap.2013.2290795
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发表时间：
2014-02-01
影响因子：
5.7
通讯作者：
Lim, Seung-Ok
中科院分区：
文献类型：
--
作者：
Lee, Juseop;Lim, Yong-Seok;Lim, Seung-Ok
在本文中，我们提出了一种自适应线圈间距变化的无线功率传输（WPT）。针对WPT系统的解析设计，提出了一种不需要计算系统电压和电流的新设计方法。所提出的设计方法使我们能够在理论上为使用连接到发送和接收线圈的电容器电路的WPT系统实现完美的阻抗匹配。提供了封闭式设计方程，以便直接应用新的设计方法。为了补偿由于间距变化而导致的两个线圈之间互耦合的变化，我们提出了一种新的可切换电容器阵列电路。为了验证新的设计方法和新的可切换电容器阵列电路，我们制造并测量了工作频率为 370 kHz 的 WPT 系统。测量结果与理论响应非常吻合，并且通过使用所提出的可切换电容器阵列电路在 5:1 的线圈间距变化上实现了小于 3% 的反射功率比。
In this paper, we present a wireless power transfer (WPT) that is adaptive to change in coil separation. For analytic design of the WPT system, a new design method which does not require calculating the voltages and currents in the system is presented. The proposed design method allows us to have perfect impedance matching theoretically for the WPT system using capacitor circuits connected to the sending and receiving coils. Closed-form design equations are provided for straight-forward application of the new design method. In order to compensate the variation of the mutual coupling between the two coils due to the change in separation, we propose a new switchable capacitor array circuit. For verification of the new design method and the new switchable capacitor array circuit, we have fabricated and measured a WPT system operating at 370 kHz. Measured results have shown a good agreement with theoretical responses, and the reflected power ratio smaller than 3% has been achieved by using the proposed switchable capacitor array circuit over the 5:1 change of coil separation.