摘要
基于环境振动的俘能装置作为自供能微电源可以有效避免对外部电源的依赖。提出了一种新型的两端固支式低频压电-电磁复合振动俘能装置。理论推导了复合俘能系统的耦合动力学模型及俘能性能方程。利用搭建的实验平台分别研究了单一压电式、单一电磁式以及复合俘能装置不同激励加速度、频率以及两个支路不同外接负载下的耦合负载特性及俘能性能。实验结果表明:在基础振动加速度0.5g,压电、电磁支路外接最佳匹配阻抗50kΩ和30Ω的条件下,压电俘能支路,电磁俘能支路以及复合俘能装置最大谐振俘能输出功率分别为1.05,7.18及8.23mW。与单一形式的俘能装置相比,提出的复合俘能器提高了俘能效率,并具有一定的宽频俘能特性。
Vibration based energy harvester are considered to be the most promising alternative self-powered energy source which can effectively avoid dependence on external power sources.A novel hybrid piezoelectric-electromagnetic vibration energy harvester with clamped-clamped beam is proposed.First,the coupling dynamic model and output power expression of the proposed hybrid energy harvester are derived.Subsequently,the energy harvesting performance and coupling load effect of the piezoelectric energy harvester component,electromagnetic energy harvester component and the hybrid energy harvester are studied experimentally,with different excitation accelerations,frequencies and different external load resistances between two tributaries.Experimental results show that with an excitation acerbation of 0.5 gat 20.5 Hz,the best matched resistance of the piezoelectric component and electromagnetic elements are 50 kΩand 30Ω,the proposed hybrid energy harvester combined with the piezoelectric and electromagnetic elements can generate up to 1.05 mW and 7.18 mW,with a total output power of 8.23 mW.Accordingly,compared with the stand-alone conversion mechanism,the energy harvesting performance of the proposed hybrid energy harvester configuration is improved,and has broadband energy harvest characteristics.
作者
张振振
娄军强
贾振
任枭荣
王涛
魏燕定
ZHANG Zhen-zhen;LOU Jun-qiang;JIAZhen;REN Xiao-rong;WANG Tao;WEI Yan-ding(College of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,China;Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province?Zhejiang University,Hangzhou 310027,China;State Grid Shaoxing Power Supply Company,Shaoxing 312008,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2020年第3期459-466,共8页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51505238,51805276,61703217)
浙江省自然科学基金资助项目(LY20E050007)
宁波市自然科学基金资助项目(2019A610112)
关键词
复合俘能装置
压电式俘能
电磁式俘能
振动俘能
负载特性
hybrid energy harvester
piezoelectric energy harvester
electromagnetic energy harvester
vibration based energy harvesting
load effect
