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Equalization Method of the Wireless Power Transfer in an Electronic Shelf Label Power Supply System

机译：电子货架标签供电系统中无线功率传输的均衡方法

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摘要

In a wireless power transmission device that drives multiple power outputs for electronic shelf labels (ESLs), we propose a novel rail transformer design for use with a 50/60 Hz power supply. By periodically short circuiting the receiving coils located closest to the transmitting coil, we experimentally verified that power can be transmitted to each ESL in a significantly uniform fashion. We expect the present approach with periodically switched receiver coils to be much more convenient, reliable, and flexible than our previous method of physically adjusting the air gaps between coils. In verification experiments, the output power of three receiving coils in a prototype was equalized at a level of approximately 60 mW. Without periodic switching, the output power of the center receiving coil only reached 40 mW, whereas, the receiving coils closest to the transmitting coils reached an output level of 80 mW, with output power fluctuating by approximately 49%. This paper demonstrates an effective design strategy for wireless power transfer devices.
机译：在为电子货架标签（ESL）驱动多个电源输出的无线电力传输设备中，我们提出了一种新颖的铁路变压器设计，可与50/60 Hz电源一起使用。通过周期性地短路最靠近发射线圈的接收线圈，我们通过实验验证了功率可以以非常均匀的方式传输到每个ESL。我们期望与周期性地调整接收器线圈之间的气隙的先前方法相比，本发明的具有周期性切换的接收器线圈的方法更加方便，可靠和灵活。在验证实验中，原型中的三个接收线圈的输出功率被均衡在大约60 mW的水平上。如果不进行定期切换，则中央接收线圈的输出功率仅达到40 mW，而最靠近发射线圈的接收线圈达到80 mW的输出电平，输出功率波动约49％。本文演示了一种有效的无线电力传输设备设计策略。

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