Adaptive active piezoelectric energy harvester

被引：0

作者：

Zhang, Liwei ^{[1
]}

Zheng, Guoqiang ^{[1
]}

Li, Jishun ^{[2
]}

机构：

[1] School of Electronic Information Engineering, Henan University of Science and Technology, Luoyang, China

[2] Henan Key Laboratory for Machinery Design and Transmission System, Henan University of Science and Technology, Luoyang, China

来源：

International Journal of Digital Content Technology and its Applications | 2012年 / 6卷 / 17期

关键词：

Piezoelectric devices - Piezoelectricity - Electromechanical coupling - Embedded systems - Natural frequencies;

D O I：

10.4156/jdcta.vol6.issue17.45

中图分类号：

学科分类号：

摘要：

For traditional piezoelectric energy harvesters, the harvested power is very low in the non-resonant frequency. In order to solve the problem, a new active piezoelectric energy harvester is designed. The electromechanical coupling model and the equivalent electrical model of the piezoelectric dynamic system are built. The adaptive active piezoelectric energy harvesting technology is investigated, and an analytical expression of an optimal control voltage harvested the maximum power is derived. Finally, an adaptive active piezoelectric energy harvesting circuit which can achieve this optimal control voltage is proposed. Experimental results reveal that the adaptive active piezoelectric energy harvester can significantly improve harvested power in the broadband. Therefore, it can be used in the energy supply field for the MEMS, WSN and embedded systems.

引用

页码：410 / 419

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