Magnetic flux detector

G - Physics – 01 – R

Patent

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Details

G01R 33/02 (2006.01) G01R 33/028 (2006.01)

Patent

CA 2374283

A magnetic flux detector comprises a core member 12 and an armature member 11, and the core member 12 generates a magnetic flux by an exciting coil 13 when the exciting coil receives an excitation current controlled by an excitation current controller 30. The magnetic flux detector further comprises a search coil 14, which is provided in a magnetic path for the magnetic flux, and a magnetic flux calculator 40, which determines the magnitude of the magnetic flux by measuring an electromotive force induced in the search coil 14 by a change in the magnetic flux. The magnetic flux calculator 40 has a potential setup resistor 43, whose resistance B is sufficiently larger than the internal resistance A of the search coil 14 (approximately A = B/3 ~ B/30).

Un détecteur de flux magnétique comprend un élément central et un élément d'armature 11, et l'élément central 12 génère un flux magnétique par une bobine d'excitation 13 lorsque celle-ci reçoit un courant d'excitation commandée par un régulateur de courant d'excitation 30. Le détecteur de flux magnétique comprend en outre une bobine de recherche 14, qui est disposée dans un chemin magnétique pour le flux magnétique, et un calculateur de flux magnétique 40, qui détermine l'amplitude du flux magnétique en mesurant une force électromotrice induite dans la bobine de recherche 14 par un changement du flux magnétique. Le calculateur de flux magnétique 40 a un potentiel de résistance d'établissement 43, dont la résistance B est suffisamment supérieure à la résistance interne de la bobine de recherche 14 (environ A = B/3 ~ B/30).

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