A device (1) for measuring electric current comprised of a plurality of magnetic field sensor elements (2, 2.1, 2.2,..., 2.n) positioned around a current carrying conductor, where each sensor element is sensitive to one vector component of the magnetic field generated by the electric current, where the sensor elements (2, 2.1, 2.2,..., 2.n) are positioned along one or more continuous closed paths encircling the conductor, characterized in that individual sensor elements (2, 2.1, 2.2,..., 2.n) on the same path have different sensitivities, or their output signals are amplified by different gain factors before they are combined to form the sensor signal, and/or sensor elements (2, 2.1, 2.2,..., 2.n) are non-evenly distributed along the path(s), .g. having a higher element concentration in the vicinity of a certain sensor axis and the output signals of the individual elements (2, 2.1, 2.2,..., 2.n) are electronically combined to generate the output signal of the current sensor, such that the current measuring device (1) has a much reduced crosstalk sensitivity with respect to certain current paths.
A device for measuring electric current
Roberto Ottoboni;Sergio Toscani
2018-01-01
Abstract
A device (1) for measuring electric current comprised of a plurality of magnetic field sensor elements (2, 2.1, 2.2,..., 2.n) positioned around a current carrying conductor, where each sensor element is sensitive to one vector component of the magnetic field generated by the electric current, where the sensor elements (2, 2.1, 2.2,..., 2.n) are positioned along one or more continuous closed paths encircling the conductor, characterized in that individual sensor elements (2, 2.1, 2.2,..., 2.n) on the same path have different sensitivities, or their output signals are amplified by different gain factors before they are combined to form the sensor signal, and/or sensor elements (2, 2.1, 2.2,..., 2.n) are non-evenly distributed along the path(s), .g. having a higher element concentration in the vicinity of a certain sensor axis and the output signals of the individual elements (2, 2.1, 2.2,..., 2.n) are electronically combined to generate the output signal of the current sensor, such that the current measuring device (1) has a much reduced crosstalk sensitivity with respect to certain current paths.File | Dimensione | Formato | |
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