Multiple-receiver resonant inductive coupling wireless power transfer (RIC-WPT) technique is emerging as a promising charging method for multiple household appliances, mobile devices, and wearable devices. However, this technique often suffers from output power fluctuation owing to the cross-interference among receivers as well as the manufacturing and aging tolerance of the resonant frequency (i.e., resonant frequency tolerance). This article proposes an autonomous RIC-WPT system concept to solve this difficulty. The proposed concept addresses the cross-interference and resonant frequency tolerance by incorporating the following two functions. First, the amplitude of the transmitter current is controlled to have a constant amplitude. Second, the phase of each receiver current is controlled to be orthogonal to that of the transmitter current by using an active reactance compensator installed in each receiver. The experiment of a two-receiver RIC-WPT system successfully verified that the two functions of the proposed system concept can stabilize the output voltage against the cross-interference and resonant frequency tolerance.

中文翻译：

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多接收器感应耦合无线功率传输的自治系统概念，用于稳定输出功率，防止接收器之间的交叉干扰和谐振频率容差


多接收器谐振电感耦合无线功率传输（RIC-WPT）技术正在成为一种有前途的多种家用电器、移动设备和可穿戴设备的充电方法。然而，由于接收器之间的交叉干扰以及谐振频率的制造和老化容差（即谐振频率容差），该技术经常遭受输出功率波动。本文提出了一种自主RIC-WPT系统概念来解决这个困难。所提出的概念通过结合以下两个功能来解决交叉干扰和谐振频率容限问题。首先，控制发射器电流的幅度以具有恒定幅度。其次，通过使用安装在每个接收器中的有源电抗补偿器，将每个接收器电流的相位控制为与发射器电流的相位正交。双接收器 RIC-WPT 系统的实验成功验证了所提出的系统概念的两个功能可以稳定输出电压以抵抗交叉干扰和谐振频率容差。