Development of Vibration Energy Harvester by Bimorph Piezoelectric Cantilever Beams

• Main Authors: Ya-JungChuang, 莊雅蓉
• Other Authors: Shih-Ming Yang
• Format: Others
• Language: en_US
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/6nhpg6

碩士 === 國立成功大學 === 航空太空工程學系 === 104 === Piezoelectric energy harvesting is the process to convert ambient vibration energy into usable electric energy. Vibration-to-electricity conversion can be realized because of the development of efficient devices with decreasing power requirement. This thesis proposes an energy harvester design by bimorph piezoelectric cantilever beams with plucking motion. The bimorph piezoelectric energy harvester is made of two piezoelectric layers of size 70×20×0.8mm and a center stainless substrate of size 72×22×0.5mm. The natural frequency is 71.43 Hz. With the initial displacement 0.5 mm, the piezoelectric energy harvester can provide maximum power of 0.27 mW. An LED can be lit after the capacitance in the piezoelectric energy storage circuit stores energy of 3 mJ.