为设计圆筒状超磁致伸缩致动器(GMA),采用基于磁路的方法对圆筒状超磁致伸缩材料(GMM)内的磁场强度进行计算,基于Maxwell软件建立了圆筒状GMA的3D模型并对磁路结构中各部件尺寸及GMA筒内构件的磁导率对磁场的影响进行了仿真研究.结果表明:在闭合的磁路结构中,对于给定的线圈匝数和激励电流,GMM筒中磁场强度大小受GMM筒轴向长度影响较大且为负相关.磁场均匀性方面,影响较大的是穿过圆筒状GMA构件的磁导率和导磁环轴向长度,二者均与磁场不均匀度正相关.
In order to design a cylindrical giant magnetostrictive actor (GMA), the magnetic field intensity in the cylindrical GMM is calculated using magnetic circuit method.The 3D model of the cylindrical GMA is established by Maxwell software and the influences of the size of each unit in the magnetic circuit are studied.The results show that in a closed magnetic circuit with specific coil turns and current, the length of the GMM has great negative correlation with the magnetic field intensity inside the cylindrical GMM.As for the uniformity, the biggest correlation factors, both of which are negative, are the magnetic permeability of the body through the cylindrical GMA and the length of the magnetic conducting ring.
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