Magnetic shielding property for cylinder with circular,square,and equilateral triangle holes

• 作者: Si-Yuan Hao Xiao-Ping Lou Jing Zhu Guang-Wei Chen Hui-Yu Li
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: GENERAL
• 页码范围: 288-294
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/abeeee

摘要

The shielding property of cylinder with circular,square,and equilateral triangle holes was investigated by finite element analysis (FEA).The hole area (Shole) plays an important role in magnetic circuit on the surface of cylinder.When Shole is less than the critical area (SH),cylinder with three shapes of holes obtained the same remanent magnetization inside,indicating that the shielding property is unaffected by the shape of the hole.Hence,high-permeability material is the major path of the magnetic field.On the condition of Shole ＞ SH,the sequence of the shielding property is equilateral triangle ＞square ＞ circular,resulting from magnetoresistance of leakage flux in air dielectric.Besides,the anisotropy of shielding property caused by hole structural differences of the cylinder is evaluated.We find that a good shielding effectiveness is gained in the radial direction,compared with the axis direction.This research focuses on providing a theoretical support for the design of magnetic shield and improvement on the magnetic shielding ability.