In some industrial application scenarios, multiple constant-voltage (CV) outputs with galvanic isolation are required. Selective power transfer among the CV outputs can enable its flexibility. This article proposes a modular single-channel wireless power transfer system for industrial power supply with a dual-frequency hybrid compensation topology. The series–series topology is adopted for CV outputs at the two CV output frequency points. The bandstop filter with a parallel resonant network is designed to filter the undesired frequency component, and the series–series–parallel resonant network is formed to avoid the impact of the bandstop filter on the desired frequency component. In this way, selective power transfer with CV outputs can be achieved by changing the working frequency. The mathematical model of the proposed compensation topology is established and analyzed. The transmission coils and the compensating inductors are integrated to achieve a compact structure. The design principles of the coupler parameters are proposed, and a design example is given. An experimental prototype is built to verify the theoretical analysis. The system realizes CV outputs and supplies power to different loads at different working frequencies, with an average transfer efficiency of 85.23% and a maximum output power of 85.95 W.

中文翻译：

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用于电力电子转换器辅助电源的双频模块化无线输电系统


在某些工业应用场景中，需要具有电流隔离的多个恒压 (CV) 输出。 CV 输出之间的选择性功率传输可以实现其灵活性。本文提出了一种具有双频混合补偿拓扑的用于工业电源的模块化单通道无线电力传输系统。两个CV输出频率点的CV输出均采用串联-串联拓扑。带并联谐振网络的带阻滤波器旨在滤除不需要的频率分量，并形成串-串-并联谐振网络，以避免带阻滤波器对所需频率分量的影响。这样，可以通过改变工作频率来实现具有CV输出的选择性功率传输。建立并分析了所提出的补偿拓扑的数学模型。传输线圈和补偿电感集成在一起，结构紧凑。提出了耦合器参数的设计原则，并给出了设计实例。搭建了实验样机来验证理论分析。系统实现CV输出，在不同工作频率下为不同负载供电，平均传输效率为85.23%，最大输出功率为85.95 W。