摘要
抗磁悬浮结构是微型振动能量采集器的核心结构,其由提升永磁体、悬浮永磁体以及上、下热解石墨板组成。该能量采集器主要通过悬浮永磁体的运动使感应线圈中的磁通量改变,从而将振动能转化为电能。为了研究悬浮永磁体对外界激励的响应情况,利用有限元仿真软件COMSOL Multiphysic ^(TM)4.4计算出悬浮永磁体在不同空间位置时所受的磁力与抗磁力,通过Matlab拟合工具箱得到磁力与抗磁力关于距离的非线性方程,结合磁力与抗磁力方程建立悬浮永磁体对外界激励响应的SIMULINK仿真模型,进而得到悬浮永磁体在外界激励下的运动规律,确定了悬浮永磁体的共振频率,同时对抗磁悬浮结构的倾斜状态进行了分析,得到了抗磁悬浮结构正常工作时所允许的最大倾斜角度。
Diamagnetic levitation structure is the core component of micro vibration energy harvester,which is composed of a lifting permanent magnet,a floating permanent magnet and an upper and a lower pyrolysis graphite plate. The energy harvester mainly changes the magnetic flux in the induction coil by the movement of the floating permanent magnet,thereby converting the vibration energy into electrical energy. In order to understand the response of the floating permanent magnet under the external excitation,using the finite element simulation software Multiphysic ^（TM）4.4 COMSOL to calculate the magnetic force and the diamagnetic force of the floating permanent magnet in different space position,the nonlinear equation of magnetic force and diamagnetic force on distance is obtained by Matlab fitting toolbox. The SIMULINK simulation model of the response of the floating permanent magnet under the external excitation is established by the combination of the magnetic force and the diamagnetic force equation,then the motion law of the floating permanent magnet is obtained and the resonance frequency of the floating permanent magnet is determined. At the same time,the inclined state of the diamagnetic levitation structure is analyzed,then the maximum inclination angle of the diamagnetic levitation structure is obtained.
出处
《仪表技术与传感器》
CSCD
北大核心
2016年第10期28-31,36,共5页
Instrument Technique and Sensor
基金
国家自然科学基金资助项目(51475369)
河南省重点科技攻关资助项目(152102210042)
关键词
抗磁悬浮
悬浮永磁体
倾斜角度
外界激励
响应
频率
diamagnetic levitation
floating permanent magnet
inclination angle
external excitation
response
frequency
