Shape Effect of Piezoelectric Energy Harvester on Vibration Power Generation

Amat A. Basari¹, Sosuke Awaji¹, Song Wang¹, Seiji Hashimoto^1*, Shunji Kumagai², Kenji Suto², Hiroaki Okada², Hideki Okuno², Bunji Homm², Wei Jiang³, Shuren Wang³

¹Division of Electronics and Informatics, Gunma University, Kiryu, Gunma, Japan.
²Research and Development Department, Mitsuba Corporation, Kiryu, Gunma, Japan.
³School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou, China.

DOI: 10.4236/jpee.2014.29017                

Abstract

Vibration energy harvesting is widely recognized as the useful technology for saving energy. The piezoelectric energy harvesting device is one of energy harvester and is used to operate certain types of MEMS devices. Various factors influence the energy regeneration efficiency of the lead zirconate titanate piezoelectric (PZT) devices in converting the mechanical vibration energy to the electrical energy. This paper presents the analytical and experimental evaluation of energy regeneration efficiency of PZT devices through impedance matching method and drop-weight experiments to different shape of PZT devices. The results show that the impedance matching method has increased the energy regeneration efficiency while triangular shape of PZT device produce a stable efficiency in the energy regeneration. Besides that, it becomes clear that the power, energy and subsequently efficiency of the triangular plate are higher than those of the rectangular plate under the condition of the matching impedance and the same PZT area.

Keywords

Vibration Power Generation, PZT Device, Impedance Matching, Energy Regeneration Efficiency

Conflicts of Interest

The authors declare no conflicts of interest.

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