Sensor and method for electric current measurement

Abstract

A sensor of electric current including a fiber (1) from a soft magnetic material with a uniform cross-sectional area and uniform magnetic properties along its whole length, equipped with an excitation coil (2) wound on said fiber (1) with a uniform winding density along the substantially whole length and possibly equipped with a sensing coil (3) wound on said fiber (1) with uniform winding density along the substantially whole length, where said fiber (1) ends are mechanically joined to form a loop enclosing the measured current carrying conductor (4) by said fiber (1), wherein said excitation coil (2) is connected to the current output of a current source (5) through a current transducer (6) generating a current signal corresponding to the excitation current flowing through said excitation coil (2) wherein the sensor is equipped with a voltage transducer (7) generating a voltage signal corresponding to the voltage on the possibly present sensing coil (3) or on the excitation coil (2) wherein said voltage signal and said current signal are fed into a processor unit (8). The present disclosure also relates to a method for electric current measurement using said sensor.

Dependencies are inferred from the claim text.