Title :
A Novel Bar-Shaped Magnetic Shielding for Magnetoresistive Sensors in Current Measurement on Printed Circuit Boards
Author :
Sun, Xinghua ; Lai, P.T. ; Pong, Philip W. T.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China
Abstract :
This paper presents the study of a novel bar-shaped magnetic shielding for magnetoresistive (MR) sensors in current measurement on printed circuit boards (PCB). The main physical principles of the shielding effect were studied by using the analytical model of magnetic flux concentration. Finite element analysis (FEA) simulations were used to simulate the shielding effects with changing geometrical parameters of the bar-shaped magnetic shielding. The dependences of the shielding effect on the parameters of length, width and thickness were analyzed. It shows that these parameters are critical for designing magnetic shielding. This new concept of magnetic shielding for MR sensors in current measurement on PCB was experimentally tested and verified in a laboratory setup. The experimental results verify the feasibility and effect of this novel magnetic shielding for MR sensors.
Keywords :
electric current measurement; finite element analysis; magnetic flux; magnetic sensors; magnetic shielding; magnetoresistive devices; printed circuits; FEA; PCB; analytical model; bar-shaped magnetic shielding; current measurement; finite element analysis; geometrical parameters; length parameters; magnetic flux concentration; magnetoresistive sensors; printed circuit boards; thickness parameters; width parameters; Magnetic flux; Magnetic noise; Magnetic sensors; Magnetic separation; Magnetic shielding; Vectors; Finite element analysis (FEA); magnetic flux concentration; magnetic shielding; magnetoresistive (MR) sensors;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2013.2274727
