Capacitive Power-Management Circuit for Micropower Thermoelectric Generators with a 2.1µW Controller

📋 论文概要

本文提出了一种用于微功率热电发电机的电容式电源管理电路，其控制器功耗仅为2.1µW，解决了在变化热条件下实现最大功率点跟踪的难题，从而减小电源整体尺寸并提高能量采集效率。

💡 主要创新点

• 采用电容式结构进行电源管理，避免了电感器件，适合低功耗应用
• 超低功耗控制器（2.1µW）实现最大功率点跟踪，适应热电发电机输出电压和功率的波动

🏷 关键词

📄 原文摘要

U.Leuven, Heverlee, Belgium R. M. A., Brussels, Belgium 3 Energy scavenging [1] is an emerging method to power energyautonomous wireless sensor systems by converting ambient environmental energy into electrical energy. Miniature as well as micro-machined thermoelectric generators (TEG) can become a suitable compact power supply for both on-the-body and industrial sensors. To minimize the overall size of the power supply, the generator has to work at its maximum power point. Due to varying thermal conditions, the generated power and voltage are not constant. Typically the output voltage is lower than the power supply voltage of the sensor. For these reasons, a power management circuit (PMC) with maximum power-point tracking capability and containing a DC/DC-converter with variable conversion factor is required that stores the generated energy in a rechargeable battery or capacitor [2].

👥 作者与机构

Inge Doms1,2, Patrick Merken1,3, Robert P. Mertens1,2, Chris Van Hoof1,2, 1

IMEC, Heverlee, Belgium , 2K