超磁致伸缩换能器磁场强度建模与线圈优化分析  

Modeling of magnetic field strength of giant magnetostrictive actuator and analysis of coil optimization

作　　者：闫洪波[1] 张天辉 马庆振 韩世发 刘怡雯 YAN Hongbo;ZHANG Tianhui;MA Qingzhen;HAN Shifa;LIU Yiwen(School of Mechanical Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古包头014010

出　　处：《兵器材料科学与工程》2024年第5期112-116,共5页Ordnance Material Science and Engineering

摘　　要：磁场强度是决定换能器性能的关键变量,为了提高超磁致伸缩换能器(GMA)的磁场强度和输出位移,本文提出了一种新型的弓张式发音振子结构,用COMSOL软件建立二维模型,得到超磁致伸缩材料(GMM)棒内部磁场分布情况。由于弓结构内部空间受限,对激励线圈进行优化,讨论了导线经验模型、静态电阻和电感模型的适用性,建立了线圈的平均磁场模型,以线径为决策变量,计算了正弦响应下不同线径的振幅比和相位滞后。结果表明:该模型在计算电阻和电感时的相对误差分别小于5.3%和4.1%。在预测正弦响应时,计算振幅比的误差低于6.6%(在大多数条件下低于1.8%),计算滞后相位的误差低于3.4%。较宽的导线直径对提高磁场振幅有较大的帮助,但对磁场的相位滞后性影响很小。In order to improve the magnetic field strength and output displacement of giant magnetostrictive transducer(GMA),a new type of arch tension articulator structure was proposed in this paper.A two-dimensional model was established by COMSOL software to obtain the magnetic field distribution inside giant magnetostrictive material(GMM)rods.Due to the limited space inside the bow structure,the excitation coil was optimized,and the applicability of the empirical model,static resistance and inductance model was discussed.The average magnetic field model of the coil was established.The amplitude ratio and phase lag of different wire diameters were calculated under sinusoidal response.The results show that the relative error of the model is less than 5.3%and 4.1%respectively.In predicting the sinusoidal response,the error in calculating the amplitude ratio is less than 6.6%(less than 1.8%under most conditions)and the error in calculating the lagged phase is less than 3.4%.A wider wire diameter is helpful to increase the amplitude of the magnetic field,but has little effect on the phase lag of the magnetic field.

关 键 词：超磁致伸缩换能器 磁场强度 平均磁场模型 线圈优化 

分 类 号：TH16[机械工程—机械制造及自动化]