Abstract
A single solid state magnetic sensor can measure a current flowing in a conductor in a non-contact way. In order to improve the accuracy of the measuring system and to reduce the cross-talk effects of other magnetic fields, circular sensor arrays can be fabricated, still preserving low costs. In magnetic sensor circular arrays the sensing elements are assembled on a circle around the conductor. The analogue sum of the sensor output signals is an approximation of the Ampere's circulation. A quite satisfactory cross-talk reduction from external magnetic field can be so achieved. More sophisticated algorithms that combine sensor output signals are necessary to further reduce cross-talk effects. In the paper we present an algorithm that is able to calculate the intensity of a DC current flowing in a rectangular bus-bar, in the presence of cross-talk fields.
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