TITLE:
Shape Effect of Piezoelectric Energy Harvester on Vibration Power Generation
AUTHORS:
Amat A. Basari, Sosuke Awaji, Song Wang, Seiji Hashimoto, Shunji Kumagai, Kenji Suto, Hiroaki Okada, Hideki Okuno, Bunji Homm, Wei Jiang, Shuren Wang
KEYWORDS:
Vibration Power Generation, PZT Device, Impedance Matching, Energy Regeneration Efficiency
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.2 No.9,
September
16,
2014
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.