Resonant rectifier topologies would be a promising candidate for achieving simple, compact, and reliable single-stage wireless power transfer (WPT) receiver if not for the lack of good dc regulation capability. This article investigates the problems that prevent the feasibility of single-stage dc regulation in resonant rectifier topologies. A possible solution is the proposed differential resonant rectifier topology, of which the rectifier is designed to have a relatively constant ac voltage, and that phase-shift control is used to achieve relatively good output regulation. Design considerations on the reactive component sizing, magnetic component design, frequency and phase synchronization, small-signal modeling, and closed-loop feedback control design, are discussed. Experimental results verified that the proposed WPT receiver system can achieve single-stage ac rectification and dc regulation while attaining the key features of low harmonic distortion in its ac output voltage, continuous dc current, and zero-voltage-switching operation over a wide operating range.

中文翻译：

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具有低输入谐波失真的单级稳压谐振 WPT 接收器

如果不是缺乏良好的直流调节能力，谐振整流器拓扑将成为实现简单、紧凑和可靠的单级无线电力传输 (WPT) 接收器的有希望的候选者。本文研究了阻碍谐振整流器拓扑中单级直流调节可行性的问题。一种可能的解决方案是提出的差分谐振整流器拓扑结构，其中整流器设计为具有相对恒定的交流电压，并且使用相移控制来实现相对良好的输出调节。讨论了无功元件尺寸、磁元件设计、频率和相位同步、小信号建模和闭环反馈控制设计的设计注意事项。