Self-Tunable Phase-Shifted SECE Piezoelectric EnergyHarvesting IC with a 30nW MPPT Achieving 446% Energy-Bandwidth Improvement and 94% Efficiency

📋 论文概要

本文提出了一种自调谐相移同步电荷提取（SECE）压电能量收集IC，实现了30nW的超低功耗最大功率点跟踪（MPPT），将能量带宽提升了446%，解决了传统压电能量收集器因谐振频率偏移导致能量提取效率低下的问题。

💡 主要创新点

• 提出了自调谐相移SECE技术，无需外部辅助电源即可自动跟踪谐振频率变化，提高能量收集效率。
• 实现了仅30nW的超低功耗MPPT电路，使系统总体功耗极低，适用于微弱振动能量收集。
• 通过相移控制将压电能量收集器的能量带宽提升446%，增强了系统对温度、老化及环境振动频率变化的鲁棒性。

🏷 关键词

📄 原文摘要

extraction capability of piezoelectric energy harvesters (PEHs), the quality factor of mechanical resonators should be maximized over the extraction-energy frequency bandwidth (EFB). As a result, the EFB is often limited to a few percent around the resonance frequency, which could dynamically shift with temperature variations and aging. Furthermore, the environment vibration frequencies may shift outside the EFB. Currently, the EFB of the PEHs is still too narrow to make them robust to process, temperature, and excitation frequency variations, so their use in real industrial applications is limited. To extend the EFB, prior art relies on tunable electrical interfaces (TEIs) to achieve a maximum-power-point tracking (MPPT) by matching the input impedance of

👥 作者与机构

Adrien Morel1, Anthony Quelen1, Carlos Augusto Berlitz1, David Gibus1,

Pierre Gasnier1, Adrien Badel2, Gaël Pillonnet1 CEA-LETI-MINATEC, Grenoble, France Université Savoie-Mont Blanc, Annecy, France 1 2 To enhance the power