摘要
文中基于磁性液体的磁特性和流动性,提出了一种利用磁性液体的晃动将机械运动直接转化为电能的振动能量收集器。理论推导了磁场作用下能量收集器输出感应电动势的数学表达式,借助有限元仿真软件COMSOL Multiphysics建立了磁性液体振动能量收集器磁场分布和流体运动的仿真模型,设计了振动结构在正弦激励下的能量收集测试实验,探究了外部激振频率、磁性液体种类和外磁场强度等因素对电阻两端输出电压的影响规律。实验结果表明:磁性液体振动能量收集器可以在低频激励水平作用下有效地收集能量,且具有较宽的工作频带。
In this paper,based on the magnetic property and fluidity of magnetic fluid,a kind of vibration energy collector which converts mechanical motion directly into electrical energy by means of sloshing of magnetic fluid was proposed.The mathe⁃matical expression of the output induced electromotive force of the energy collector under the action of magnetic field was theoreti⁃cally derived.The simulation model of the magnetic fluid vibration energy collectors magnetic field distribution and fluid movement was established with the help of the finite element simulation software COMSOL Multiphysics.The experiment of energy collection of vibration structure under sinusoidal excitation was designed.The influences of external excitation frequency,magnetic fluid type and magnetic field intensity on the output voltage at both ends of the resistor were investigated.Experimental results show that the magnetic fluid vibration energy collector can effectively collect energy under low frequency excitation and has a wide operating frequency band.
作者
杨文荣
陈颖
杨晓锐
张雨蒙
YANG Wen-rong;CHEN Ying;YANG Xiao-rui;ZHANG Yu-meng(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300130,China;School of Electrical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2022年第7期100-105,共6页
Instrument Technique and Sensor
关键词
感应电动势
输出电压
磁性液体
振动能量
能量收集器
induced electromotive force
output voltage
magnetic fluid
vibration energy
energy collector
