A Wireless Power Transmission System with Load Regulation for Implantable Devices
A Wireless Power Transmission System with Load Regulation for Implantable Devices
复制标题
用于植入式设备的具有负载调节功能的无线电力传输系统
DOI：
--
复制
发表时间：
--
影响因子：
2.1
通讯作者：
邓冬琴
中科院分区：
文献类型：
--
作者：
李大为;周阳;崔勇强;黄思佳;邓冬琴
无线电力传输（WPT）的应用越来越受到人们的关注，但由于不可避免的损耗，其能效不能达到很高。由于其无线低效率的特性，节能WPT在植入式设备中的需求越来越大。此外，许多植入式器件包含微控制器单元（MCU）等数字电路，由于无线传输的功率有限，随着数字电路的驱动时钟在地（Gnd）和电源电压（Vdd）之间切换，供电电压可能会出现严重波动，甚至在无线充电条件下系统可能会被切断。因此，在WPT系统中也需要进行负载调节。本文提出了一种负载调节和天线优化设计的可植入器件WPT系统，测量结果表明，该系统最大传输效率可达79.3%，且仍需要较大的动态负载电流范围。负载电流在12ua和5ma之间切换时，输出电压的过调值为150mv，过调值为80mv。最后，介绍了几种最新的WPT在生物医学设备中的应用。
The application of Wireless Power Transmission (WPT) has attracted more and more attention, but the energy efficiency cannot be high due to the inevitable.loss. Energy efficient WPT is increasingly demanded especially in implantable devices due to their wireless inefficiency nature. In addition, many implantable devices include digital circuits such as a Microcontroller Unit (MCU) in which the supply voltage may fluctuate severely with the driving clock of digital circuits switches between ground (Gnd) and supply voltage (Vdd), since the power transmitted wirelessly is limited, and the system may even cut off under wireless charging conditions. Therefore, the load regulation is also required in a WPT system. This paper presents a WPT system with load regulation and optimized antenna design for implantable devices, for which measurement results show that the maximum transmission efficiency can reach 79.3% and it can still necessitate a large dynamic load current range. When the load current is switched between 12 uA and 5 mA, the overshoot and undershoot of the output voltage are 150 mV and 80 mV, respectively. Finally, several state-of-the-art WPT applications in biomedical devices are introduced.