Title :
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
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;
Conference_Titel :
Electronics and Nanotechnology (ELNANO), 2013 IEEE XXXIII International Scientific Conference
Conference_Location :
Kiev
Print_ISBN :
978-1-4673-4669-6
DOI :
10.1109/ELNANO.2013.6551994
