Evaluation of energy harvesting by using piezoelectric unimorph ceramics

Author

Ting, Yung ; Hariyanto, Gunawan ; Hou, Bing Kuan ; Huang, Chong Yu

Author_Institution

Dept. of Mech. Eng., Chung Yuan Christian Univ., Chungli, Taiwan

fYear

2009

fDate

22-24 June 2009

Firstpage

778

Lastpage

783

Abstract

By using the piezoelectric direct effect, piezoelectric energy harvesters hold the promise of providing an alternative power generating device. Also, ambient vibration is the focus to provide the amount of available mechanical energy resource that can be converted into electricity by piezoelectric ceramics. Design and analysis of the piezoelectric unimorph ceramic and electric converter as well as efficiency of electromechanical conversion and energy storage is studied in this article. In experiment, electric power 33.84 mW is gained by a capacitor 470 muF and a load resistor 10.4 M-ohm at low operating frequency of 2.5 Hz for 25 seconds, for example. The effectiveness of this electric power to fully charge a NiMH battery only needs 30 minutes.

Keywords

energy harvesting; energy storage; piezoceramics; piezoelectricity; power convertors; vibrations; NiJkH; ambient vibration; capacitance 470 muF; capacitor; electric converter; electromechanical conversion; energy storage; frequency 2.5 Hz; mechanical energy resource; piezoelectric direct effect; piezoelectric energy harvesters; piezoelectric unimorph ceramic; power 33.84 mW; power generating device; resistance 10.4 Mohm; time 25 s; time 30 min; Batteries; Capacitors; Ceramics; Energy conversion; Energy storage; Frequency; Mechanical energy; Power generation; Resistors; Vibrations;

fLanguage

English

Publisher

ieee

Conference_Titel

Information and Automation, 2009. ICIA '09. International Conference on

Conference_Location

Zhuhai, Macau

Print_ISBN

978-1-4244-3607-1

Electronic_ISBN

978-1-4244-3608-8

Type

conf

DOI

10.1109/ICINFA.2009.5205026

Filename

5205026