Modeling、Simulation and Optimization of a High Efficiency Piezoelectric Energy Harvester
The never-ending drive towards self-powered devices poses severe challenges for the energy harvester designer.In particular,raising the efficiency of a piezoelectric energy harvester is becoming more and more important,especially in the presence of a significant vibration.However,the existing energy harvesters are simply rectifying the AC output from the piezoelectric elements,and in this situation the energy harvesting efficiency is low.In this paper we show that by applying a switching power converter the power transformation efficiency can be enhanced by more than 400%.This switching power converter is derived from the Buck-Boost Converter,and in this work it is optimized by using a control circuitry of low power consumption.The whole circuitry has been modeled and simulated in the Pspice software.The simulation results show that after optimization the proposed energy harvester can provide a much higher output power,and at the same time,the power transformation efficiency from the mechanical input to elecric output has been significantly increased.The proposed system exhibits efficiency as a high power piezoelectric energy harvester.
energy harvesting piezoelectric power converter self-powered devices
Yong Ma Hao Jiang Hui Shen Jinhao Qiu Adrin Badel
The Aeronautic Key Laboratory for Smart Materials & Structures,Nanjing Univerisity of Aeronautics & Institute of Fluid Science,Tohoku University,Sendai,9808577
国际会议
南京
英文
143-148
2007-09-09（万方平台首次上网日期，不代表论文的发表时间）