Magnetic configuration of current sensor using inductive magnetic detector

Abstract

Magnetic configuration of a current sensor using an inductive magnetic detector is described. The inductive magnetic detectors have been developed as a detector for a weak magnetic field, whereas it needs something new ideas to detect a strong magnetic field like a field caused by a large current. In this paper, to realize a current sensor for a large current, suitable structures of a magnetic core for a detector and a magnetic yoke surrounding a current wire are investigated. A magnetic field simulator is utilized to confirm the strength of magnetic fields under analysis. As a result current amplitude ±500A is successfully detected within linearity errors of ±0.2%.