Simulation of Shielding Effectiveness in Low Frequencies for Conductive Enclosure

Keshtkar, Asghar; Maghoul, Amir; Kalantarnia, Ali; Hashempour, Hamid

doi:10.1109/iccee.2009.250

Cited by 6 publications

(6 citation statements)

References 3 publications

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“…From these equations, it is worth noticing that SE is lowered at low frequencies. Among others, power distribution (50–60 Hz) belongs to this frequency range meaning that people are highly exposed to these radiations . Hence, an important issue is about the protection of electromagnetic radiations for low frequencies.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Shielding at Low Frequencies: Application for an Aluminum/Steel Composite Elaborated by Accumulative Roll Bonding

et al. 2019

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An IF steel/Al6061 composite elaborated by Accumulative Roll Bonding at room temperature is proposed for shielding effectiveness applications. The obtained composite is lighter than the copper and the steel with a density of 3-4.5. In the earlier rollings, a multilayered composite is developed which is in favor of strength but not of shielding. On the contrary, after 3 roll bondings, fragments of IF steel appear in the Al6061 matrix and drastically reduce strength but improve shielding. A finite element simulation of the shielding effectiveness is performed and

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Section: Introductionmentioning

confidence: 99%

Magnetic Shielding at Low Frequencies: Application for an Aluminum/Steel Composite Elaborated by Accumulative Roll Bonding

et al. 2019

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“…The larger the electric field energy density is, the greater the amount of electromagnetic coupling is. Therefore, the electric field energy density can be used as an important performance metric to analyze the electromagnetic coupling path of a shielding enclosure [23][24][25][26].…”

Section: Performance Metrics Of Electromagnetic Coupling Characterist...mentioning

confidence: 99%

Simulation Analysis of Electromagnetic Environment Effect and Shielding Effectiveness for VPX Chassis under Plane Wave Radiation

Ni,

Jiang,

et al. 2024

ACES Journal

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The chassis based on the VPX bus standard structure has been widely applied to the fields of vehicle, missile, radar, etc. In this paper, we analyze the electromagnetic environment effect on VPX chassis via the CST software, and investigate the electromagnetic coupling characteristics of VPX chassis under 20 v/m plane wave radiation according to the RS103 test defined in the MIL-STD-461G standard. By simulation, we analyze the electromagnetic coupling paths of the VPX chassis, find the key positions of the electromagnetic protection such as the air intake, air outlet, trapdoor, and panel gaps, and we propose the electromagnetic protective measures for the weak parts of the VPX chassis. The electromagnetic shielding effectiveness before and after protection design is evaluated. Finally, the simulation results are verified by the experiments. It has guiding significance for the electromagnetic protection design of VPX chassis.

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“…At low frequencies, we can regard the magnetic field as a result of the electric current flow and the magnetization of surrounding materials. There are two basic methods for shielding against low-frequency magnetic sources: the diversion of the magnetic flux with high-permeability materials and the generation of opposing flux via Faraday’s law [ 5 ]. Therefore, we can combine the two methods to achieve active and passive shielding.…”

Section: Introductionmentioning

confidence: 99%

“…X. Ni et al [9] used plasma spraying technology to prepare an amorphous Fe 73 . 5 Cu 1 Nb 3 Si1 3 . 5 B 9 coating on a brass substrate to improve the shielding efficiency of low-frequency magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of a Magnetic Shielding System Combining Active and Passive Modes

Meng,

Wang,

Lin

et al. 2024

Nanomaterials

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Considering the magnetic shielding requirements of both geomagnetic field and 50 Hz power-line frequency in the complex working conditions of the power grid, an electromagnetic shielding system combining active and passive modes is proposed in this article. A three-dimensional Helmholtz coil with a magnetic shielding barrel nested inside is established by the COMSOL simulation tool, and the magnetic shielding efficiency of the system is analyzed. Comparing different materials, the simulation results indicate that permalloy alloy exhibits better shielding performance than pure iron and nickel materials. Additionally, the overall shielding efficiency of the shielding barrel increases linearly with the number of multiple layers. Under the combined active and passive electromagnetic shielding conditions, the system achieves a shielding efficiency of SE = 113.98 dB, demonstrating excellent performance in shielding both AC and DC interference magnetic fields. This study provides theoretical guidance for the construction of magnetic shielding systems in electromagnetic interference environment.

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Simulation of Shielding Effectiveness in Low Frequencies for Conductive Enclosure

Cited by 6 publications

References 3 publications

Magnetic Shielding at Low Frequencies: Application for an Aluminum/Steel Composite Elaborated by Accumulative Roll Bonding

Magnetic Shielding at Low Frequencies: Application for an Aluminum/Steel Composite Elaborated by Accumulative Roll Bonding

Simulation Analysis of Electromagnetic Environment Effect and Shielding Effectiveness for VPX Chassis under Plane Wave Radiation

Theoretical Analysis of a Magnetic Shielding System Combining Active and Passive Modes

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