Performance enhancement of an out-of-plane electret-based vibrational energy harvester with dual charged plates

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

物理学;能源学

Tao, K.^1 ; Lye, S.W.^1 ; Miao, J.M.^1 ; Hu, Xiao^2

School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore

639798, Singapore^1

School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore

639798, Singapore^2

关键词: Acceleration change;    Experimental analysis;    Operational bandwidth;    Output voltages;    Performance enhancements;    Random vibrations;    Seismic mass system;    Vibrational energies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/557/1/012064/pdf
DOI  :  10.1088/1742-6596/557/1/012064

来源: IOP

【 摘 要 】

This paper presents a novel out-of-plane electret-based vibrational power generator (EVPG) that has both negative and positive charged electret plates integrated into a single seismic mass system. Compared with the conventional single-charged two-plate configuration, the proposed device not only exhibits an enhanced output voltage magnitude but also has a wide operational bandwidth due to spring softening nonlinearity according to the experimental analysis. With the acceleration changes from 0.1g to 0.5g, the operating 3-dB bandwidth can be increased 2.6 times from 2.5 Hz to 6.5 Hz, which indicates higher energy conversion efficiency than a linear energy harvester in the practical scenario of broadband random vibrations.