Using the dynamic behavior of superimposed fields for point field-based current sensing

Author

Olson, E.R. ; Lorenz, R.D.

Author_Institution

Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI

fYear

2006

Abstract

The dynamic behavior of magnetic fields surrounding adjacent current carrying conductors is investigated for the purpose of point field-based current sensing. The influence of eddy currents on magnetic field distribution over the useful spectrum (DC to 1 MHz) is quantified using a spatially dependent metric, the 5% flat bandwidth (FBW). A comparison of field distributions at DC and 1 MHz show the origin of the FBW function, which is unique to each conductor´s cross-section and nearby environment. The FBW fields for several different conductor geometries are analyzed. Superposition is used for conductor geometries that have multiple currents. A method for determining optimal field detector placement using optimization functions is introduced

Keywords

conductors (electric); eddy currents; electric current measurement; magnetic field measurement; magnetic fields; sensors; 1 MHz; current carrying conductors; eddy currents; magnetic field distribution; point field-based current sensing; superimposed fields; Anisotropic magnetoresistance; Bandwidth; Conductors; Costs; Detectors; Giant magnetoresistance; Magnetic fields; Magnetic sensors; Power electronics; Shunt (electrical);

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2006. APEC '06. Twenty-First Annual IEEE

Conference_Location

Dallas, TX

Print_ISBN

0-7803-9547-6

Type

conf

DOI

10.1109/APEC.2006.1620597

Filename

1620597