Design and fabrication of a piezoelectric transducer for wind-power generator

被引:12
|
作者
Chang, Wei-Tsai [2 ]
Chen, Ying-Chung [2 ]
Lin, Re-Ching [2 ]
Cheng, Chien-Chuan [1 ]
Kao, Kuo-Sheng [3 ]
Wu, Bing-Rung [2 ]
Huang, Yu-Chang [2 ]
机构
[1] De Lin Inst Technol, Dept Elect Engn, Taipei, Taiwan
[2] Natl Sun Yat Sen Univ, Dept Elect Engn, Kaohsiung, Taiwan
[3] Shu Te Univ, Dept Comp & Commun, Kaohsiung, Taiwan
关键词
ZnO; Transducers; PET; ITO; Generators; FRAMEWORK; FILMS;
D O I
10.1016/j.tsf.2011.01.015
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This study investigates the feasibility of a high-performance ZnO piezoelectric transducer for wind-power generation applications. The piezoelectric transducer is constructed of a Cu/ZnO/ITO/PET structure. Closely examining the ITO/PET substrate by a nano indenter reveals a low Young's modulus of 6.62 Gpa for specific deflections. The ZnO piezoelectric film of 965 nm is deposited on ITO/PET substrate using a RF magnetron sputtering system at room temperature. A copper layer is attached to the ZnO/ITO/PET structure to construct piezoelectric transducers. Both scanning electron microscopy and X-ray diffraction indicate that, among the favorable characteristic of the ZnO piezoelectric film include a rigid surface structure and a high c-axis preferred orientation. According to cantilever vibration theory, a transducer with a cantilever length of 9.9 mm and vibration area of 1.5 cm(2) is designed for natural wind. An appropriate mass loading of 0.57 g on the cantilever is critical for increasing the vibration amplitude and promoting the generated power of a piezoelectric transducer. Finally, an open circuit voltage of 1.87 V for the ZnO piezoelectric transducer at a vibration frequency of 100 Hz is obtained by an oscilloscope. After rectifying and filtering, the output power of the generator exhibits an available benefit of 0.07 mu W/cm(2) with the load resistance of 5 M Omega. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:4687 / 4693
页数:7
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