Parameter Modeling Analysis of a Cylindrical Ferrite Magnetic Shield to Reduce Magnetic Noise

Magnetic field shields are important for electronic equipment, ultrahigh-sensitivity sensors, and electrical instruments. For ultrahigh-sensitivity atomic sensors, in particular, ferrite shields with low intrinsic magnetic noise are widely used. In this article, the calculation methods of longitudin...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2022-01, Vol.69 (1), p.991-998
Main Authors: Ma, Danyue, Lu, Jixi, Fang, Xiujie, Yang, Ke, Wang, Kun, Zhang, Ning, Han, Bangcheng, Ding, Ming
Format: Article
Language:English
Subjects:
Aspect ratio
Core loss
Diameters
Electronic equipment
Ferrite magnetic shields
Ferrites
Frequency measurement
hysteresis loss
Loss measurement
Magnetic hysteresis
Magnetic noise
Magnetic separation
Magnetic shielding
Mathematical models
Noise
Optimization
parameter modeling analysis
Parameters
Sensitivity
Sensors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Magnetic field shields are important for electronic equipment, ultrahigh-sensitivity sensors, and electrical instruments. For ultrahigh-sensitivity atomic sensors, in particular, ferrite shields with low intrinsic magnetic noise are widely used. In this article, the calculation methods of longitudinal and transverse magnetic noise, which are calculated by loss, are analyzed. The experimental results confirm the feasibility of the model. Using the loss separation method, it is proved that the loss of ferrite magnetic shielding is mainly hysteresis loss, which is below 100 Hz. To effectively reduce the magnetic noise, we analyze the effect of structure parameters on the longitudinal and transverse magnetic noise, and the optimized parameters are obtained. The results show that the longitudinal magnetic noise decreases with the increasing aspect ratio and stabilize eventually. When the aspect ratio exceeds 1, the transverse magnetic noise remains practically unchanged. When the external diameter is fixed, by optimizing the thickness of the magnetic shield, the optimal solution for the longitudinal and transverse magnetic noise is obtained.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2021.3050351