The regulated output characteristic is crucial for a wireless power transfer (WPT) system. Most studies focus on the single-load system or the system with multiple evenly distributed loads; however, the loads might distribute in space at different distances from the power supply in practice. In this article, a WPT hybrid repeater system is proposed to power multiple loads over a long distance. The output mode of each load in the system can be switched separately to realize the load-independent constant-current (CC) or constant-voltage (CV) output. Based on four compensation network combinations of a two-load WPT repeater system with CC/CV output, the structure of the $N$ -load WPT hybrid repeater system with load-independent CC/CV output is derived. With the ZPA input characteristic, fixed operating frequency, and high system efficiency, the proposed system can be easily used in various medium- or low-power applications. The effects of system parameters on output characteristics, power transfer capability, and system efficiency are investigated. A three-load experimental prototype was built to verify the theoretical analysis. Measurement results were in good agreement with the analysis, and the maximum measured efficiency reached 83%.

中文翻译：

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具有独立于负载的恒流或恒压输出的长距离无线电源传输到多个负载

稳压输出特性对于无线电力传输 (WPT) 系统至关重要。大多数研究集中在单负载系统或具有多个均匀分布负载的系统上；然而，在实践中，负载可能会分布在距电源不同距离的空间中。在本文中，提出了一种 WPT 混合中继器系统，可为远距离的多个负载供电。系统中各负载的输出模式可单独切换，实现与负载无关的恒流（CC）或恒压（CV）输出。基于CC/CV输出的双负载WPT中继器系统的四种补偿网络组合，推导出负载无关CC/CV输出的$N$负载WPT混合中继器系统的结构。ZPA输入特性，工作频率固定，系统效率高，建议的系统可以轻松用于各种中低功率应用。研究了系统参数对输出特性、功率传输能力和系统效率的影响。搭建了三载荷实验样机对理论分析进行验证。测量结果与分析吻合较好，最大测量效率达到83%。