A 4µW-to-1mW Parallel-SSHI Rectifier for Piezoelectric Energy Harvesting of Periodic and

📋 论文概要

提出一种并行SSHI整流器，用于压电能量采集，可同时处理周期性振动和冲击激励。通过电感共享和冷启动技术，实现了4µW至1mW的宽功率范围，并带来高达681%的功率提取提升。

💡 主要创新点

• 提出并行SSHI拓扑，同时优化周期性和冲击激励下的能量提取效率。
• 采用电感共享方案，减少外部元件数量，降低成本并适合小型化。
• 集成冷启动功能，无需外部电源即可启动系统。

🏷 关键词

📄 原文摘要

Improvement Daniel A. Sanchez1, Joachim Leicht1, Eduardas Jodka1, Elham Fazel1, Yiannos Manoli1,2 University of Freiburg - IMTEK, Freiburg, Germany, Hahn-Schickard, Villingen-Schwenningen, Germany 1 2 A piezoelectric energy harvester (PEH) converts vibration-induced mechanical stress into electrical charge. This conversion is optimized for cantilever-based generators when excited continuously in resonance. However, this is rarely achieved using ambient vibrations, where changes in excitation frequencies (fEX) and magnitudes, or shock excitations are more common [1]. The implemented system (Fig. 21.2.1) is a fully autonomous energy-harvesting interface based on the parallel-synchronized-switch harvesting-on-inductor (SSHI) technique, also known as bias-flip [2], and can work with periodic as well as shock excitations. It allows enhanced ambient energy extraction by operating at an ideal rectified

👥 作者与机构

Shock Excitations with Inductor Sharing, Cold, Start-up and up to 681% Power Extraction