摘要
环境振动是自然环境中一种普遍存在的能量方式,具有振幅随机、方向往复、频率低等特点。首先,设计了一种机械整流电磁式振动能量吸能器,其可将环境振动整流为输出轴的单向转动,实现直流电能的输出。其次,对吸能器进行动力学建模及输出特性的推导,仿真分析其在不同振幅、频率及负载电阻条件下的电压输出特性,并研究输出电压的影响规律。最后,开展定量输入下的吸能器输出特性实验测试。结果表明,该装置可将环境振动转换为连续不间断的直流电能输出;振动幅值、频率及负载电阻对输出电压均有影响,当振动幅值为50mm,频率为0.8Hz,负载电阻为100Ω时,输出电压峰值为14.2V,瞬时功率达到2W。
As a kind of ubiquitous energy in natural environment, environmental vibration has the characteristics of random amplitude, direction reciprocating, and low frequency. Firstly, an electromagnetic energy harvester using mechanical rectifier is designed, which can rectify the environmental vibration into one-way rotation of the shaft to realize the output of the direct current electric energy. Secondly, the dynamical model of the energy harvester is built and its output characteristics are derived; and the voltage output characteristics under different vibration amplitudes, frequencies and load resistance conditions are numerically analyzed. Finally, the experimental tests on the output characteristics of the energy harvester under determined vibration input are conducted. The results show that this device can transfer the environmental vibration into continuous direct current electric energy output, and the amplitude, frequency and load resistance all have effects on the output voltage of the harvester. When the vibration amplitude is 50 mm, the frequency is 0.8 Hz, and the load resistance is 100 Ω, the peak value of the output voltage is 14.2 V and the instantaneous power can reach 2 W.
作者
杨毅青
骈亚威
张泽洲
陈佳明
YANG Yiqing;PIAN Yawei;ZHANG Zezhou;CHEN Jiaming(School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China)
出处
《中国科技论文》
CAS
北大核心
2018年第16期1829-1835,共7页
China Sciencepaper
基金
国家自然科学基金资助项目(51675032
51205013)
中央高校基本科研业务费专项资金资助项目(YWF-17-BJ-Y-08)
关键词
机械制造及其自动化
振动
机械整流器
电磁感应
吸能器
mechanical manufacturing and automation
vibration
mechanical rectifier
electromagnetic induction
energy harvester
