Current imbalance in multistring light-emitting diodes (LEDs) is a critical issue. It may cause overcurrent in one or more LED strings, leading to rapid degradation. In this paper, a mixed high-order compensation networks-based wireless power transfer system is proposed to generate multiple constant current outputs. It is composed of an LCC resonant network in the transmitting side, a series resonant network, and multiple CLC resonant rectifiers in the receiving side. The CLC resonant rectifiers are connected in parallel to form multiple independent output channels, and each channel is then connected to an LED string. Based on the analysis of the T resonant circuit and the modeling of coupling coils, multiple constant output currents can be derived. As a result, current balance can be achieved, which is very suitable for driving multistring LEDs. The proposed system also offers a modular, scalable, and maintenance-free design, which can significantly reduce the construction cost and the control complexity. In addition, the inverter in the transmitting side can achieve zero phase angle. A laboratory prototype with dual independent output currents is built to verify the proposed method. The experimental results agree well with the theoretical analysis.

中文翻译：

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用于驱动多串 LED 的具有恒定电流输出的基于混合高阶补偿的 WPT 系统的分析、设计和实验验证

多串发光二极管 (LED) 中的电流不平衡是一个关键问题。它可能会导致一个或多个 LED 串中的过电流，从而导致快速退化。在本文中，提出了一种基于混合高阶补偿网络的无线电力传输系统来产生多个恒流输出。它由发射侧的LCC谐振网络、串联谐振网络和接收侧的多个CLC谐振整流器组成。CLC谐振整流器并联形成多个独立的输出通道，然后每个通道连接到一个LED串。基于 T 谐振电路的分析和耦合线圈的建模，可以导出多个恒定输出电流。因此可以实现电流平衡，非常适合驱动多串LED。所提出的系统还提供模块化、可扩展和免维护的设计，可以显着降低建设成本和控制复杂性。此外，发射侧逆变器可以实现零相角。建立具有双独立输出电流的实验室原型来验证所提出的方法。实验结果与理论分析吻合较好。