Device and method for the contactless, precise measurement of the DC part in a mixed current

摘要

devices (a) and method for noncontact measurement of the gleichstromanteils in a mischstrom a stromleiters comprehensively a magnetic probe (17) for detecting the wechselstromanteils and gleichstromanteils in mischstrom, an oscillator (3) for generating a anregungssignals,a compensation unit (6) for the production of a kompensierstroms to inductive compensation of the wechselstromanteils in magnetic probe, and a phasenregelschleife (2) that is set up, the phases of the anregungssignals and kompensierstroms with the phase of the wechselstromantei ls in the mischstrom to sync.the correction of the non-linear magnetic - sondensignals can be used linearisierungskurve through the identification of stu00fctzstellen and, if necessary, subsequent interpolation is gained.