研究扭轉模式的壓電發電機

Abstract

近幾年綠色能源和再生能源的議題受到世人重視，愈來愈多人研究如何將環境中源 源不斷的能量轉換成能有效利用的能源。本研究以壓電材料因振動造成應變而產生電荷 的運作原理，設計小型發電裝置擷取週遭環境的機械能，轉換成電能。有別於大多數壓 電式的小型發電機利用壓電片彎曲的方法來發電，本研究設計以扭轉振動的方式來發電 的小型發電機，並且為發電機設置彈性基座以增加發電功率。本研究的成果可提供感測 器，或者各種攜行電子產品的補充電源。所使用的研究方法包括力學的理論推導和發電 實驗的操作。

Green energy and renewable energy issues are under intensive discussion. More and more people are interested in transforming energy acquired form ambient vibration into useful energy. This study hence aims to scavenge mechanical energy from ambient vibration into electrical energy by utilizing piezoelectric materials. Unlike most of piezoelectric generators that use a bending mode to generate electricity, this study converts torsional vibration energy to electrical energy. In addition, a flexible base of the generator is proposed to increase power. Results of this project will serve as supplemental power source of wireless sensors and portable electronic devices. This study will carry out both theoretical derivation of mechanics and measurement of power generation.