Self-Synchronized Class E Resonant Rectifier by Compensating Propagation Delay for Multi-MHz Switching Applications
Self-Synchronized Class E Resonant Rectifier by Compensating Propagation Delay for Multi-MHz Switching Applications
复制标题
通过补偿多 MHz 开关应用的传播延迟的自同步 E 类谐振整流器
DOI：
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发表时间：
2022
影响因子：
6.7
通讯作者：
Jungwon Choi
中科院分区：
文献类型：
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作者：
Minki Kim;Jungwon Choi
在这篇文章中，自同步，高频E类谐振整流器，提出了补偿同步信号的不匹配，由于传播延迟。同步整流通过使用诸如<sc>MOSFET</sc>的有源器件而不是二极管来帮助功率转换系统提高其效率。由于集成电路（IC）组件和栅极驱动器的传播延迟，即使使用<sc>MOSFET</sc>，在多MHz无线功率传输（WPT）系统中从输入源生成准确的同步信号仍然具有挑战性。通常，传播延迟大于10 ns，这是多MHz操作中的一个重要周期。为了减小传播延迟，我们提出了自同步整流器，在<inline-formula><tex-math notation="LaTeX">$C_{s}$</tex-math></inline-formula>-<inline-formula><tex-math notation="LaTeX">$L_{s}$</tex-math></inline-formula>网络中检测信号。该设计通过测量谐振滤波器<inline-formula><tex-math notation="LaTeX">$C {s}$</tex-math></inline-formula>-<inline-formula><tex-math notation="LaTeX">$L {s}$</tex-math></inline-formula>之间的节点电压，为整流器中的有源器件产生合适的门极信号。在实验中，我们测试的驱动方法在E类整流器的输出功率为228 W，开关频率为13.56 MHz。虽然总传播延迟为8 ns（包括栅极驱动器和比较器），但感测电压的超前相位成功抵消了驱动器的传播延迟。
In this article, a self-synchronized, high-frequency class E resonant rectifier is proposed to compensate for the synchronization signal mismatch due to the propagation delay. The synchronous rectification helps the power conversion system increase its efficiency by using active devices such as <sc>mosfets</sc> instead of diodes. Even with the <sc>mosfets</sc>, it is still challenging to generate an accurate synchronous signal from the input source in the multi-MHz wireless power transfer (WPT) systems due to the propagation delay from the integrated circuit (IC) components and the gate driver. In general, the propagation delay is more than 10 ns, a significant period in the multi-MHz operation. To mitigate the propagation delay, we present the self-synchronized rectifier, sensing the signal in the <inline-formula><tex-math notation="LaTeX">$C_{s}$</tex-math></inline-formula>-<inline-formula><tex-math notation="LaTeX">$L_{s}$</tex-math></inline-formula> network. The proposed design creates a proper gate signal to the active device in the rectifier by measuring the voltage of the node between <inline-formula><tex-math notation="LaTeX">$C_{s}$</tex-math></inline-formula>-<inline-formula><tex-math notation="LaTeX">$L_{s}$</tex-math></inline-formula> resonant filter. In the experiments, we tested the driving method in the class E rectifier at an output power of 228 W and a switching frequency of 13.56 MHz. While the total propagation delay was 8 ns, including the gate-driver and comparator, the leading phase of the sensing voltage successfully offsets the driver’s propagation delay.