Tunable nonlinear piezoelectric vibration harvester

14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Neiss, S.^1 ; Goldschmidtboeing, F.^1 ; Kroener, M.^1 ; Woias, P.^1

Laboratory for Design of Microsystems, IMTEK, University of Freiburg, Georges-Koehler-Allee 102, Freiburg

79110, Germany^1

关键词: Compensation algorithm;    Frequency windows;    Piezoelectric energy harvesting;    Piezoelectric vibration;    Power out put;    Tuning mechanism;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/557/1/012113/pdf
DOI  :  10.1088/1742-6596/557/1/012113

来源: IOP

【 摘 要 】

Nonlinear piezoelectric energy harvesting generators can provide a large bandwidth combined with a good resonant power output. However, the frequency response is characterized by a strong hysteresis making a technical use difficult if the hysteresis cannot be compensated. We propose a tuning mechanism that allows both, a compensation of the hysteresis as well as maintaining the optimal work point. The compensation algorithm can reduce the hysteresis to a minimum of only 1.5 Hz and maintain a high energy oscillation in a large frequency window between 53.3 Hz and 74.5 Hz.