Buck-boost converter for sensorless power optimization of piezoelectric energy harvester

被引：330

作者：

Lefeuvre, Elie ^{[1
]}

Audigier, David ^{[1
]}

Richard, Claude ^{[1
]}

Guyomar, Daniel ^{[1
]}

机构：

[1] INSA Lyon, LGEF, F-68621 Villeurbanne, France

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2007年 / 22卷 / 05期

关键词：

AC-DC power conversion; dc-dc power conversion; energy conversion; piezoelectric devices; power conditioning; power generation;

D O I：

10.1109/TPEL.2007.904230

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：

This paper presents a comprehensive model for miniature vibration-powered piezoelectric generators and analyses modes of operation and control of a buck-boost converter for the purpose of tracking the generators optimal working points. The model describes the generator's power dependence with the mechanical acceleration and frequency, and helps in the definition of the load behaviour for power optimization. Electrical behaviour of the input of buck-boost converter in discontinuous current mode turns out to be in perfect agreement with the considered optimization criteria with a very simple, sensorless control. Experimental results show that the converter controlled by a very low consumption circuit effectively maximizes the power flow into a 4.8 V rechargeable battery connected to the converter output. The converter's efficiency is above 84% for input voltages between 1.6 and 5.5 V, and for output powers between 200 mu W and 1.5 mW. The presented circuit and control can be used as well for power optimization of electromagnetic energy harvesting devices.

引用

页码：2018 / 2025

页数：8

共 28 条

[1] Power management for energy harvesting wireless sensors [J].