A Single-Inductor 0.35µm CMOS Energy-Investing Piezoelectric Harvester

📋 论文概要

该论文提出了一种采用单电感的0.35µm CMOS压电能量采集器，通过能量投资技术延长振动周期内的阻尼时间，从而提升采集效率。解决了微型系统因储能有限而导致寿命短的问题。

💡 主要创新点

• 首次在压电能量采集中采用单电感结构，通过切换开关和电感电路实现能量投资，高效延长阻尼（采集）持续时间。
• 无需桥式整流器，减少了电压损耗和器件数量，提高了整体能量转换效率。
• 通过控制时序和能量回馈，实现了对压电换能器输出能量的最大化提取。

🏷 关键词

📄 原文摘要

Because miniaturized systems store little energy, their lifespans are often short. Fortunately, vibrations are consistent and abundant in many applications, so ambient kinetic energy can be a viable source. Vibrations induce the charges in piezoelectric transducers to build electrostatic forces that damp vibrations and convert kinetic energy into the electrical domain. The shunting switches and switched-inductor circuit of bridge rectifiers in [1-2] increase this output energy by extending the damping (i.e., harvesting) duration within a vibration cycle. Because the output voltages of bridge rectifiers clamp and limit the electrical damping forces built, switched-inductor converters in [3-4], whose damping voltages can exceed their rectified outputs, draw more power from vibrations. Still, electrical–mechanical coupling factors in tiny transducers are low, so electrical damping forces (i.e., voltages) remain weak. Investing energy into the

👥 作者与机构

Dongwon Kwon, Gabriel Alfonso Rincon-Mora

Georgia Institute of Technology, Atlanta, GA