G - Physics
01
R
G01R 15/20 (2006.01)
Patent
CA 2368901
The invention relates to a current meter which is based on the principle of surface field measurement. Hall sensors (1) are used which are arranged in such a way, that they are excited by a magnetic field which is proportional to the current. Two Hall sensors are arranged in such a way, that they detect the field to be measured quantitatively in a uniform manner, but with opposing polarity signs. By subtracting the output signals from the Hall sensors, the measured value of the current is amplified, whilst external parasitic induction is eliminated.
L'invention concerne un mesureur de courant reposant sur le principe de mesure de champ de surface. On utilise à cet effet des détecteurs de Hall (1) qui sont agencés de façon à être excités par un champ magnétique proportionnel au courant. Il est prévu deux détecteur de Hall agencés de façon qu'ils détectent quantitativement les champs à mesurer, uniformément mais de signes opposés. Par soustraction des signaux de sortie des détecteurs de Hall, la valeur mesurée du courant est amplifiée, cependant que les influences parasites extérieures sont éliminées.
Jodehl Gerd
Pniok Thomas
Wollny Heinz
Aeg Niederspannungstechnik Gmbh & Co. Kg
Craig Wilson And Company
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