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AssigneeABB ENTRELEC (Societe par actions simplifiee)
InventorSébastien Noël
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A current sensor includes: several magnetic-field-sensitive components which are disposed on a support such as to be distributed around a conductor through which a current to be measured flows, and a processing circuit which receives an output signal from the components, each component having at least one first terminal which is connected to a summing point by a summing resistor and a second terminal which is connected to a common point. Moreover, all of the resistors are connected to a first conductor which is connected to the summing point and all of the second terminals are connected to a second conductor which is connected to the common point. The support includes a printed circuit, while the two conductors include conductor tracks of the printed circuit, which are routed in a zigzag manner on the printed circuit such as to form a bunched or braided conductor.
Current sensor adapted to measure the value of the current flowing in a conductor (4), comprising a support (11) adapted to be positioned about the conductor through which the current to be measured flows, several components (6) sensitive to the magnetic field, disposed on said support (11) so as to be distributed about said conductor (4), and a processing circuit (9) receiving an output signal from said components (6) sensitive to the magnetic field, each component sensitive to the magnetic field comprising at least one first and one second terminal, the first terminals (6a) of all the components (6) sensitive to the magnetic field being connected by respective summing resistances (7) to a summing point (8) connected to a first input terminal (9a) of the processing circuit (9), the second terminals (6b) of all the components (6) sensitive to the magnetic field being connected to a second input terminal (9b) of the processing circuit, characterized in that all the summing resistances (7) are connected to a first conductor (31) connected to the summing point (8), all the second terminals (6b) of the components (6) sensitive to the magnetic field are connected to a second conductor (14) connected to the second input terminal (9b) of the processing circuit (9), the support (11) is constituted by a printed circuit, and the first and second conductors (13 and 14) are constituted respectively by first and second conductive tracks of the printed circuit which are arranged in zigzag on the printed circuit (11) so as to form a twist or a braid.
Dependencies are inferred from the claim text.