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.
Highlights
In recent years, solutions for the environmental and energy problems correspond to the increment of power demand all over the world have become a great interest of research
This paper presents the evaluation of vibration energy regeneration efficiency of PZT devices which is produced through impedance matching approach and by different shape of PZT devices
This paper has successfully evaluated how impedance matching, shape of devices, concentrated mass and forced vibration contribute to the variation of the energy regeneration efficiency of PZT devices
Summary
Solutions for the environmental and energy problems correspond to the increment of power demand all over the world have become a great interest of research. In [9] the authors work on sensor shape design and in [10] structure of the device has been focused for the optimum energy output. Another factor that can contribute to the variation in the output level of the vibration energy harvesting system is the power conditioning circuits. This paper presents the evaluation of vibration energy regeneration efficiency of PZT devices which is produced through impedance matching approach and by different shape of PZT devices. Energy regeneration efficiency of PZT devices under the same PZT area and matching impedance is evaluated analytically and experimentally
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