Active Class E Rectifier for DC Output Voltage Regulation in Megahertz Wireless Power Transfer Systems
Active Class E Rectifier for DC Output Voltage Regulation in Megahertz Wireless Power Transfer Systems
复制标题
用于兆赫兹无线电力传输系统中直流输出电压调节的有源 E 类整流器
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Chengbin Ma
中科院分区：
文献类型：
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作者：
Ming Liu;Jibin Song;Chengbin Ma
在实际应用中，通常希望从无线电力传输（WPT）系统获得一个可调节的直流输出电压。这种电压调节是特别必要的，因为耦合线圈的相对位置可能发生变化，从而改变互感。对于工作在兆赫兹（MHz）的WPT系统，由于其简单的配置和软开关操作，E类整流器被认为是有利的。本文提出了一种新型的基于类的有源整流器。这种整流器能够同时进行高效率整流和输出电压调节，但不需要有一个额外的调节电路。给出了解析推导和分析，详细说明了其工作原理。还制定了平衡设计参数的指南，在不同的标准之间折衷。最后的实验验证了分析分析和通过有源整流器调节直流输出电压的正确性。通过控制整流器的占空比，可以在不同的互感系数下保持恒定的输出电压（10 V），整流效率大于92%。
In real applications, it is usually desirable to have a regulated dc output voltage from a wireless power transfer (WPT) system. This voltage regulation is especially necessary because of possible variation in coupling coil relative position and thus a changing mutual inductance. For WPT systems working at megahertz (MHz), Class E rectifiers are known to be advantageous, thanks to their simple configuration and soft-switching operation. In this paper, we propose a new Class-E-based active rectifier. This rectifier is capable to simultaneously perform high-efficiency rectification and output voltage regulation, but without the need to have an additional regulating circuit. Analytical derivations and analysis are provided to explain the operation principle in detail. Guidance is also developed for a balanced design of parameters, which compromises among different criteria. Final experiments validate the analytical analysis and dc output voltage regulation via the active rectifier. With the duty cycle control of the rectifier, a constant output voltage (10 V) can be maintained under a varying mutual inductance coefficient and with more than 92% rectifying efficiency.