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AssigneeSocomec
InventorChristian Kern
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A device for measuring the intensity of an electric current which has a simple and economical design and offers a high measurement dynamic compatible with combined measurement, protection and energy metering applications. The device (1) is insensitive to parasitic fields and to the position of the electric conductor to be measured, and that can be opened to facilitate placement thereof. The device (1) defines a closed path (C), about a conductor (2) for the circulation of the lines of magnetic field induced by the current to be measured, and the path is formed by two plates (30) having a high magnetic permeability separated by two air gaps (E) closed by two identical and opposed electric coils (4) for supplying a voltage proportional to the derivative of the intensity (I) of the current to be measured. The device (1) reduces the is compact so that it can be easily integrated into any type of electric appliance.
1-17. (canceled)
A device (1) for measuring an intensity (I) of an electric current, the device comprising at least one magnetic circuit (3) located near an electric conductor (2) traversed by a current to be measured for channeling a magnetic field induced around the conductor by the current to be measured, at least one electric coil (4) associated with the magnetic circuit (3) for delivering a voltage proportionate to a derivative of the intensity (I) of the current to be measured, and at least one module for processing the voltage to deliver a value for the intensity measured, the magnetic circuit (3) being open and defining at least two gaps (E), each gap (E) being closed by an electric coil (4) such that the magnetic circuit (3) and the electric coils (4) define a closed path (C) for circulation of the magnetic field, the coils (4) disposed in the gaps (E) are made from printed circuits (40) comprising windings (41) engraved on a substrate that are parallel to one another and perpendicular to a direction in which the magnetic field circulates, and the coils (4) disposed in the gaps (E) occupy more than one third of the closed path (C).
An electric apparatus (10) supplied by at least two electric conductors (2), the apparatus comprising at least one measurement device (1) for measuring an intensity (I) of electric current in at least one of the electric conductors (2), the measurement device comprising at least one open magnetic circuit (3) defining at least two wide gaps (E), each of the gaps being closed by an electric coil (4), the magnetic circuit (3) and the electric coils (4) defining a closed path (C) for the circulation of a magnetic field, the electric coils (4) disposed in the gaps (E) being in the form of printed circuits (40) and comprising windings (41) engraved on a substrate that are parallel to one another and perpendicular to a direction of circulation of the magnetic field, and the coils (4) being disposed in the gaps (E) occupying more than one-third of the closed path (C).
Dependencies are inferred from the claim text.