EconPapers    
Economics at your fingertips  
 

A New Approach to Calculate the Shielding Factor of Magnetic Shields Comprising Nonlinear Ferromagnetic Materials under Arbitrary Disturbances

Yiyang Zhao, Zhiyin Sun, Donghua Pan, Shengxin Lin, Yinxi Jin and Liyi Li
Additional contact information
Yiyang Zhao: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
Zhiyin Sun: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
Donghua Pan: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
Shengxin Lin: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
Yinxi Jin: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China
Liyi Li: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China

Energies, 2019, vol. 12, issue 11, 1-11

Abstract: To enable the realization of ultra-low magnetic fields for scientific and technological research, magnetic shielding is required to create a space with low residual magnetic field and high shielding factors. The shielding factors of magnetic shields are due to nonlinear material properties, the geometry and structure of the shields, and the external magnetic fields. Magnetic shielding is used in environments full of random realistic disturbances, resulting in an arbitrary and random external magnetic field, and in this case, the shielding effect is hard to define simply by the shielding factors. A new method to simulate and predict a dynamic internal space magnetic field wave is proposed based on the Finite Element method (FEM) combined with the Jiles-Atherton (JA) model. By simulating the hysteresis behavior of the magnetic shields and establishing a dynamic model, the new method can simulate dynamic magnetic field changes inside magnetic shields as long as the external disturbances are known. The shielding factors under an AC external field with a sine wave and certain frequencies are calculated to validate the feasibility of the new method. A real-time wave of internal magnetic flux density under an AC triangular wave external field is simulated directly with the new method versus a method that splits the triangular wave into several sine waves by a Fourier transform, divides the shielding factors, and then adds the quotients together. Moreover, real-time internal waves under some arbitrary fields are measured. Experimental internal magnetic flux density waves of a 4-layer magnetically shielded room (MSR) at the Harbin Institute of Technology (HIT) fit the simulated results well, taking experimental errors into account.

Keywords: magnetic shields; shielding factor; Jiles-Atherton model; nonlinear ferromagnetic materials; environmental disturbances (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/11/2048/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/11/2048/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:11:p:2048-:d:235190

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().

 
Page updated 2025-03-19
Handle: RePEc:gam:jeners:v:12:y:2019:i:11:p:2048-:d:235190