SENSOR FOR MEASURING A DIRECT CURRENT AND A MEASURING METHOD

摘要

The invention relates to an inductive sensor based on an annular, closed, soft magnetic core (K). In said sensor, the current to be measured produces an inductive variation within the annular closed magnetic circuit. Said variation is picked up by a measuring coil (MW) which is wound around the core. To achieve a linear behaviour within a wide measuring range, the annular, closed core has core areas (KB) which contain a magnetic powder composite and in particular, a ferrite polymer composite material (FPC).