Patent ID: 6411078
Filing Date: 2002-06-25
Classification: G01R

Abstract:
A current sensor apparatus, comprising:a ring-shaped magnetic yoke through which a magnetic flux generated by an electric current flowing through an electric current path passes, the yoke surrounding the electric current path, part of the yoke having a gap; a magnetic sensor element placed in the gap of the magnetic yoke and provided for detecting a magnetic field in the gap generated by the current flowing through the current path; a magnetic field interrupter, placed between the current path and the gap, for interrupting a magnetic field corresponding to a magnetic flux that is generated by the current passing through the current path and does not pass through the magnetic yoke, so that the magnetic field is cut off from the magnetic sensor element; and a first magnetic path and a second magnetic path, through which the magnetic flux passing through the magnetic yoke passes divergently, wherein the first magnetic path passes through the magnetic sensor element, and the second magnetic path passes through the magnetic field interrupter.