A Biased-SECE Interface for Piezoelectric Energy Harvesting with Geometric-Mean-Computational MPPT Achieving 99.9%

📋 论文概要

该论文提出了一种用于压电能量收集的偏置同步电荷提取（Biased-SECE）接口电路，并采用几何均值计算最大功率点跟踪（MPPT）技术，实现了99.9%的MPPT效率。解决了传统接口在静态MPP精度和动态跟踪响应速度之间的权衡问题，显著提升了能量提取能力。

💡 主要创新点

• 提出偏置同步电荷提取（Biased-SECE）接口，优化了压电换能器的能量提取效率。
• 采用几何均值计算MPPT方法，实现快速跟踪（8.75个周期内追踪∆VOC变化）和高精度（99.9% MPPT效率）。
• 通过动态MPP跟踪，使能量提取提升9.3倍，适应时变开路电压环境。

🏷 关键词

📄 原文摘要

harvesting (PEH)—which converts ambient vibrations into electrical energy—has emerged [1–6]. The interface circuit in a PEH system plays a crucial role not only in energy extraction and conversion but also in enabling the piezoelectric (PZT) to operate near its maximum power point (MPP). Enhancing the efficiency of PEH systems requires careful attention to both static performance (MPP accuracy) and dynamic performance (MPP tracking responsiveness). Rapid online tracking of the MPP is particularly critical, as it allows PEH to adapt seamlessly to the time-varying open-circuit voltage (VOC) of the PZT, as well as to different types of input vibrations, whether periodic or shock-induced [7]. Figure 31.2.1 (top-left) shows previous approaches. The MPPT scheme based on fractional open-circuit

👥 作者与机构

MPPT Efficiency, 8.75Cycles/∆VOC Tracking, and 9.3x Energy, Extraction

Jiho Lee, Hyun-Sik Kim KAIST, Daejeon, Korea As the demand for sustainable energy solutions grows, piezoelectric energy