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Magnetic shielding property for cylinder with circular, square, and equilateral triangle holes |
| Si-Yuan Hao(郝思源)1,2,3, Xiao-Ping Lou(娄小平)1,2,3,†, Jing Zhu(祝静)1,2,3, Guang-Wei Chen(陈广伟)1,2,3, and Hui-Yu Li(李慧宇)1,2,3 |
1 Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing 100192, China;
2 Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University, Beijing 100016, China;
3 Beijing Key Laboratory of Optoelectronic Measurement Technology, Beijing Information Science & Technology University, Beijing 100192, China |
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Abstract 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.
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Received: 18 December 2020
Revised: 18 February 2021
Accepted manuscript online: 16 March 2021
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PACS:
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07.55.Ge
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(Magnetometers for magnetic field measurements)
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41.20.Gz
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(Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems)
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07.05.Tp
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(Computer modeling and simulation)
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| Fund: Project supported by the Key Projects of the National Natural Science Foundation of China (Grant No. 51535002) and the Programme of Introducing Talents of Discipline to Universities (Grant No. D17021). |
Corresponding Authors:
Xiao-Ping Lou
E-mail: louxiaoping@bistu.edu.cn
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Cite this article:
Si-Yuan Hao(郝思源), Xiao-Ping Lou(娄小平), Jing Zhu(祝静), Guang-Wei Chen(陈广伟), and Hui-Yu Li(李慧宇) Magnetic shielding property for cylinder with circular, square, and equilateral triangle holes 2021 Chin. Phys. B 30 060702
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