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宁波大学信息科学与工程学院, 浙江宁波 315211
Received:13 December 2019,
Revised:2021-01-10,
Published:25 August 2021
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李毅,夏银水,王修登等.基于同步电荷提取的高效多压电能俘获电路设计[J].电子学报,2021,49(08):1625-1632.
LI Yi,XIA Yin-shui,WANG Xiu-deng,et al.High Efficiency Multi-piezoelectric Energy Harvesting Circuit Design Based on Synchronous Electric Charge Extraction[J].ACTA ELECTRONICA SINICA,2021,49(08):1625-1632.
李毅,夏银水,王修登等.基于同步电荷提取的高效多压电能俘获电路设计[J].电子学报,2021,49(08):1625-1632. DOI: 10.12263/DZXB.20200002.
LI Yi,XIA Yin-shui,WANG Xiu-deng,et al.High Efficiency Multi-piezoelectric Energy Harvesting Circuit Design Based on Synchronous Electric Charge Extraction[J].ACTA ELECTRONICA SINICA,2021,49(08):1625-1632. DOI: 10.12263/DZXB.20200002.
本文提出了一种基于同步电荷提取的高效多压电能俘获电路(High Efficiency Multi-piezoelectric Energy Harvesting Circuit Based on Synchronous Electric Charge Extraction
EM-SECE).所提出的电路利用改进的正负峰值检测结构,减小了压电元件(Piezoelectric Transducer
PZT)达到电压峰值处和开关动作之间的相位差,从而提高了单个压电元件的能量收集效率.并且利用单电感的时分复用,实现基于单电感的多个压电元件振动能俘获.所提出电路具有无整流桥结构,且可以实现自供电的特点.实验结果表明,相同实验条件下,单压电EM-SECE电路的俘获功率为标准能量俘获电路(SEH)最大功率的3.09倍; 在仅用一个电感的情况下,双压电EM-SECE电路的俘获功率为两个单压电EM-SECE电路之和的97%.
In this paper
a high efficiency multi-piezoelectric harvesting circuit based on synchronous charge extraction (EM-SECE) is presented. The proposed circuit utilizes an improved positive and negative peak detection structure so that the phase difference between the peak voltage of the piezoelectric transducer and the switching action is reduced
and then the energy harvesting efficiency of the single piezoelectric transducer is improved. Further
using time division multiplexing of single inductor
multi-piezoelectric energy harvesting is achieved. The proposed circuit is of self-powered characteristic with no rectifying bridge structure. The experimental results show that under the same experimental condition
the harvesting power of the EM-SECE circuit for single piezoelectric transducer is 3.09 times than the maximum power of the standard energy harvesting circuit; with only one inductor
the harvesting power of the EM-SECE circuit with double piezoelectric transducers is 0.97 times of the harvesting power sum of two piezoelectric transducers.
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