A Scalable N-Step Equal Split SSHI Piezoelectric Energy Harvesting Circuit Achieving 1170% Power Extraction Improvement and 22nA Quiescent Current with a 1µH-to-10µH Low Q Inductor

📋 论文概要

该论文提出了一种可扩展的N步均分SSHI压电能量收集电路，通过减少电荷损失实现了1170%的功率提取提升。该技术解决了全桥整流器在压电换能器电流方向变化时产生的大电荷损失问题。

💡 主要创新点

• 提出可扩展的N步均分SSHI技术，允许灵活配置步数以优化能量提取
• 通过等分电压翻转策略显著减少电荷损失，实现1170%的功率提取提升

🏷 关键词

📄 原文摘要

mechanical energy into AC electrical energy and can be a solution to various power issues related to the self-powered systems. The simplest way to harvest AC energy is to apply a full-bridge rectifier (FBR). However, the FBR causes a sinusoidal current of the PT (IP) to charge/discharge the inherent capacitor of the PT (CP) whenever the IP direction changes, resulting in a large charge loss. To address this issue, synchronized-switch harvestingon-inductor (SSHI) and synchronous electric-charge extraction (SECE) techniques have been proposed. The conventional SSHI reduces the charge loss by using the bias flip technique, which inverts the voltage across the CP (VPT) with LCP resonance [1] (Fig. 30.1.1, top left). Although it increases the extracted power and the voltage of the

👥 作者与机构

Yeon-Woo Jeong, Seung-Ju Lee, Jong-Hun Kim, Mun-Jung Cho,

Hwa-Soo Kim, Se-Un Shin Ulsan National Institute of Science and Technology, Ulsan, Korea Energy harvesting with a piezoelectric transducer (PT) converts ambient