A Bias-Flip Rectifier with a Duty-Cycle-Based MPPT Algorithm for Piezoelectric Energy Harvesting with 98% Peak MPPT Efficiency and 738% Energy-Extraction Enhancement

📋 论文概要

该论文提出了一种用于压电能量收集的偏转整流器，采用基于占空比的最大功率点跟踪（MPPT）算法，解决了传统MPPT算法跟踪效率低的问题，实现了98%的峰值MPPT效率。

💡 主要创新点

• 提出基于占空比的MPPT算法，无需传统Perturb & Observe中的比较器，降低功耗和复杂度
• 设计高效偏转整流器，结合阻抗匹配与MPPT，实现高功率提取效率
• 采用同步开关电感（SSHI）结构，优化能量回收机制

🏷 关键词

📄 原文摘要

Synchronized bias-flip rectifiers, such as synchronized switch harvesting on inductor (SSHI) rectifiers, are widely used for piezoelectric energy harvesting (PEH) [1], which can replace the use of batteries in many IoT applications, thus reducing both system volume and maintenance cost. However, the output power extracted by such rectifiers strongly depends on the impedance matching between the piezoelectric transducer (PT) and the circuit. To maximize this, two maximum power point tracking (MPPT) algorithms are often used. As shown in Fig. 30.3.1 (left), the Perturb & Observe (P&O) (a.k.a. hillclimbing) algorithm adjusts the rectified output power in a stepwise manner towards the maximum power point (MPP), thus establishing robust and continuous MPPT. However, accurately sensing the rectified output power often requires complex and power-hungry hardware [1, 2]. Another simpler algorithm is based on the fractional open-circuit voltage

👥 作者与机构

Xinling Yue, Sundeep Javvaji, Zhong Tang, Kofi A.A. Makinwa, Sijun Du

Delft University of Technology, Delft, The Netherlands