Patent ID: 9417269
Filing Date: 2016-08-16
CPC Classification: G01R

Claim Text:
1. A coreless current sensor for measuring a current flowing through a conductor, the current sensor comprising: a supporting substrate; a sensor substrate that is mounted on a surface of the supporting substrate, which is opposed to the conductor; a magnetoelectric converter formed on a surface of the sensor substrate, which is opposite from a back surface of the sensor substrate that is mounted on the supporting substrate, the magnetoelectric converter being configured to output a signal that changes with an applied magnetic field, and a magnetic shield that surrounds the sensor substrate and the conductor to magnetically shield the inside from the outside, wherein the current is measured based on a change in the output signal caused by a magnetic field induced by the current, the output signal of the magnetoelectric converter changes with a magnetic field applied along a formation surface of the sensor substrate, which forms the magnetoelectric converter, the magnetic shield has two gaps for reducing magnetic saturation in the magnetic shield, the two gaps and the sensor substrate are located at the same height in a z-direction orthogonal to the formation surface of the sensor substrate, the sensor substrate is located in the center of the symmetrical portion of the magnetic shield, and the two gaps face each other across the sensor substrate along a reference line that extends along the formation surface of the sensor substrate, which is opposed to the conductor, through the two gaps.