A Vibration Energy Harvester with Internal Impact and Hybrid Transduction Mechanisms
To increase the power harvesting capability of an internal impact type vibration energy harvester (VEH),the authors have developed a novel hybrid VEH integrating both piezoelectric and electromagnetic (EM) modules for energy conversion.The proposed VEH transforms a low frequency external base vibration into an internal impact vibration of the tip of a cantilever beam,which is used to cause energy conversion by the piezoelectric effect and electromagnetic induction.A prototype is designed,fabricated and tested; the optimum load resistances are determined experimentally,and the power output performance and the total power density of the proposed VEH have been experimentally characterized with respect to the excitation amplitude and frequency.The dependence of the optimum excitation frequency for maximum total power output on the excitation amplitude has also been experimentally investigated.The total output power and power density are 0.8 mW and 15 μW/cm3,respectively,when the excitation amplitude and frequency are 1 mm (rms) and 15 Hz,respectively.
Vibration Energy Harvesting Impact Piezoelectric Electromagnetic Hybrid
Songmao Chen Jing Sun Junhui Hu
State Key Lab of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,210016,Nanjing,P.R.China
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）