Magnetic field-based current sensor for frequency-compensated measurement of alternating currents

摘要

The present invention relates to a current sensor (10, 20, 30, 40, 50, 60, 70) for the magnetic field-based current determination of an alternating current I through a current conductor (38, 56) based on a magnetic field-sensitive sensor element (12, 108). The sensor element (12, 108) is arranged spatially adjacent to the current conductor (38, 56) in order to detect a magnetic field caused by the alternating current I in the current conductor (38, 56). It is proposed that at least one conductive compensation element (80, 90) separate from the current flow I through the current conductor (38, 56) and spatially adjacent to the sensor element (12, 108) and the current conductor (38, 56) to compensate for frequency-dependent distortions of the Magnetic field is arranged by means of a compensation magnetic field that can be generated by induction.