The series-series compensation topology is widely adopted in many wireless power transfer applications. For such systems, their wireless power receiver part typically involves a dc–dc converter with front-stage full-bridge diode rectifier, to process the high-frequency transmitted ac power into a dc output voltage for the load. It is recently reported that the current source nature of the series-series compensation will introduce right-half-plane (RHP) zeros into the small-signal transfer functions of the dc–dc converter of the wireless power receiver, which will severely affect the stability and dynamic response of the system. To resolve this issue, in this article, it is proposed to adopt a different rectifier configuration for the system such that the input current to the dc–dc converter becomes controllable to eliminate the presence of RHP zeros of the small-signal transfer functions of the system. This rectifier can be applied to different wireless power receivers using the buck, buck-boost, or boost converters. As compared with the original wireless power receivers, the modified ones feature minimum-phase characteristics and hence ease the design of compensator. Theoretical and experimental results are provided. The comparative experimental results verify the elimination of the RHP zero, improved dynamic responses of reference tracking and against load disturbances, and a larger stability margin.

中文翻译：

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通过右半平面消零改善无线电力接收器系统的动态响应和稳定性裕度

串串联补偿拓扑在许多无线电力传输应用中被广泛采用。对于此类系统，它们的无线电力接收器部分通常包括带有前级全桥二极管整流器的 DC-DC 转换器，以将高频传输的交流电源处理为负载的直流输出电压。最近有报道称，串串联补偿的电流源性质会将右半平面 (RHP) 零点引入无线电力接收器的 dc-dc 转换器的小信号传递函数中，这将严重影响系统的稳定性和动态响应。为了解决这个问题，在这篇文章中，建议为系统采用不同的整流器配置，以便 dc-dc 转换器的输入电流变得可控，以消除系统小信号传递函数的 RHP 零点的存在。该整流器可应用于使用降压、降压-升压或升压转换器的不同无线电源接收器。与原来的无线电力接收器相比，改进的无线电力接收器具有最小相位特性，因此简化了补偿器的设计。提供了理论和实验结果。对比实验结果验证了 RHP 零的消除、参考跟踪和负载扰动的改进动态响应以及更大的稳定性裕度。该整流器可应用于使用降压、降压-升压或升压转换器的不同无线电源接收器。与原来的无线电力接收器相比，改进的无线电力接收器具有最小相位特性，因此简化了补偿器的设计。提供了理论和实验结果。对比实验结果验证了 RHP 零的消除、参考跟踪和负载扰动的改进动态响应以及更大的稳定性裕度。该整流器可应用于使用降压、降压-升压或升压转换器的不同无线电源接收器。与原来的无线电力接收器相比，改进的无线电力接收器具有最小相位特性，因此简化了补偿器的设计。提供了理论和实验结果。对比实验结果验证了 RHP 零的消除、参考跟踪和负载扰动的改进动态响应以及更大的稳定性裕度。