A friendly approach to increasing the frequency response of piezoelectric generators

Author

Ben-Yaakov, Shmuel ; Hadar, Gil ; Shainkopf, Amit ; Krihely, Natan

Author_Institution

Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel

fYear

2013

fDate

16-19 April 2013

Firstpage

349

Lastpage

353

Abstract

A wide bandwidth piezoelectric generator (PZG) was constructed and tested experimentally. The PZG was characterized using chirp and wideband random excitations. The experimental results showed that by proper shaping of an attached cantilever beam it is possible to increase the number of vibration modes of the PZG and, hence, to improve the effectiveness of the energy harvesting as compared with a conventional cantilever PZG configuration. The proposed structure was designed to produce 3 vibration modes, which extend the operation around the frequencies 35Hz, 57Hz and 76Hz. As a result, the bandwidth was widened by a factor of 2.81 as compared with a conventional harvester.

Keywords

beams (structures); cantilevers; electric generators; energy harvesting; frequency response; piezoelectric devices; resonant power convertors; vibrational modes; cantilever PZG configuration; cantilever beam shaping; chirp; energy harvesting; frequency 35 Hz; frequency 57 Hz; frequency 76 Hz; frequency response; resonant power conversion; vibration mode; wide bandwidth piezoelectric generator; wideband random excitation; Acceleration; Bandwidth; Generators; Power generation; Resonant frequency; Structural beams; Vibrations; Harvesting piezoelectric devices; resonant power conversion;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Nanotechnology (ELNANO), 2013 IEEE XXXIII International Scientific Conference

Conference_Location

Kiev

Print_ISBN

978-1-4673-4669-6

Type

conf

DOI

10.1109/ELNANO.2013.6551994

Filename

6551994