基于垂直中继线圈结构的L形无线充电装置设计与优化

Design and Optimization of an L-Shaped Wireless Charging Device Based on Vertical Repeater Structure

目前手机等掌上移动电子设备的无线充电设计多采用发射-接收线圈水平叠放布置方式。考虑到大量电子设备需要立式工作,单一的水平充电模式无法满足设备边工作边充电的需求,为此提出一种基于垂直中继线圈结构的无线电能传输系统。设计一种L形基座,利用基座侧面的发射线圈与底面中继线圈的配合,实现电子设备在基座上及其附近从水平到竖直范围内任意角度的无线充电,满足设备不同工作状态时的充电需求。首先采用等效电路模型对系统进行分析,得出传输功率及效率的影响因素;其次通过仿真研究了三种典型接收线圈位置系统的传输特性并通过实验验证了仿真结果;最后,利用仿真对中继线圈与发射线圈的相对位置进行优化,实验结果表明优化后的系统效率最大可提高6%。

Today’s wireless charging for movable handy terminals like mobile phones utilizes a charging pad on which the terminals must be placed horizontally. This working mode cannot meet the requirement of charging while working. Given that various devices need to work in upright mode, a novel wireless power transfer (WPT) system based on vertical repeater was proposed. An L-shaped charging base in which the lateral transmitter and the repeater on the base cooperate to charge devices at any angle on and in vicinity of the base, was designed. Analysis of the equivalent circuit model was conducted and expressions of transmission power and efficiency were obtained. Transmission characteristics at three typical positions of the receiver were studied through simulation and verified by experiments. The relative position of repeater to the transmitter was optimized through simulation and the experimental results show that the efficiency can achieve a improvement up to 6%.