Access Restriction

Author Hudoffsky, B. ♦ Roth-Stielow, J.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2011
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Coils ♦ Measurement ♦ Transducer ♦ Current sensor ♦ Magnetic sensors ♦ Current measurement ♦ Sensor phenomena and characterization ♦ Frequency measurement ♦ Probes ♦ GMR Sensor ♦ Sensor
Abstract Magnetic field sensitive semiconductors used for current measurement work well, but do have restrictions. Offset, sensitivity, linearity, temperature drift and measuring range are often critical properties of a current probe, especially if it is realised with magnetic field sensors like Hall effect and any kind of ferromagnetic flux concentrator. This paper is focused on the working principle of a new evaluation method for a DC to low frequency current measurement device, utilizing magnetic field sensitive semiconductors, which is designed to be part of a wide bandwidth clamping current probe. Distinctive to this new method is, that an external compensation coil surrounds the sensing semiconductor and no ferromagnetic core is needed. The presented measurement method is extendable to a very wide range of current amplitudes. A clamping sensor head for a current probe has been built, assembling an array of GMR (giant magneto resistance) sensors driven and evaluated with this method. The performance of this prototype for ±800 A is presented.
Description Author affiliation: University of Stuttgart, Institute of Power Electronics and Electrical Drives, Pfaffenwaldring 47, 70569 Stuttgart, Germany (Hudoffsky, B.; Roth-Stielow, J.)
ISBN 9781612841670
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2011-08-30
Publisher Place United Kingdom
e-ISBN 9789075815146
Size (in Bytes) 374.01 kB
Page Count 7
Starting Page 1
Ending Page 7

Source: IEEE Xplore Digital Library