Title :
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
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);
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
DOI :
10.1109/APEC.2006.1620597
