Modeling and analysis of magnetic spring enhanced lever-type electromagnetic energy harvesters  

作　　者：Ning YU Xiangyi FEI Chuanyu WU Bo YAN 

机构地区：[1]School of Mechanical Engineering&Automation,Zhejiang Sci-Tech University,Hangzhou 310018,China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2022年第5期743-760,共18页应用数学和力学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.52175125)。

摘　　要：This study presents a novel enhanced monostable lever-type electromagnetic energy harvester(L-EEH).According to the positions of the coil and the lever pivot,four configurations are discussed to realize a better harvesting performance of the L-EEHs.On the basis of establishing the theoretical model of the L-EEH,the corresponding analytical solutions can be obtained by applying the harmonic balance method.The effects of the nonlinear coefficient,the lever ratio,the mass ratio,and the circuit parameters on the energy harvesting performance of L-EEHs are analyzed and discussed.The numerical and experimental efforts are carried out to verify the theoretical model and the energy harvesting performance.The results demonstrate that the maximum output voltage can be achieved with an appropriate lever ratio.Furthermore,the L-EEH possesses a considerable energy harvesting performance under a smaller lever ratio compared with the other three configurations.The output power can also be improved by adjusting the tip mass of the lever.The proposed L-EEH has a considerable operating bandwidth and an output power,which can reach 146.6 mW under the excitation amplitude of 0.3 g.

关 键 词：electromagnetic energy harvesting MONOSTABLE nonlinear vibration lever HARVESTER 

分 类 号：O322[理学—一般力学与力学基础] O441.3[理学—力学]