A Nanopower Synchronous Charge Extractor IC for Low-Voltage Piezoelectric Energy Harvesting With Residual Charge Inversion

被引：76

作者：

Dini, Michele ^{[1
]}

Romani, Aldo ^{[1
]}

Filippi, Matteo ^{[1
]}

Tartagni, Marco ^{[1
]}

机构：

[1] Univ Bologna, Dept Elect Elect & Informat Engn, I-47521 Cesena, Italy

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2016年 / 31卷 / 02期

关键词：

Energy harvesting; nanopower; piezoelectric transducers; power converter; power management; INTERFACE CIRCUIT; POWER CONVERSION; SUPERCAPACITORS; TRANSDUCERS; RECTIFIER; GENERATOR;

D O I：

10.1109/TPEL.2015.2417352

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The paper presents a power converter for piezoelectric energy harvesting implementing a modified version of a synchronous electrical charge extraction with quiescent current as low as 160 nA. The input energy is increased of more than 200% for weak vibrations, by inverting the residual charge left on the capacitance of the transducer after each energy extraction. Moreover, a power management policy, named two-way energy storage, is introduced in order to improve significantly the efficiency of the energy harvesting system in battery-less systems during the startup phase, when the energy storage is fully depleted. The converter behaves as a buck-boost converter, and the measured peak efficiency is 85.3%. The IC has been designed in a 0.32-mu m microelectronic technology from STMicroelectronics in an active area of 0.95mm(2).

引用

页码：1263 / 1274

页数：12

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