Patent ID: 9671436
Date: 2017-06-06
CPC Classifications: G01R

Claim:
1. An electric current sensor comprising: a core having a coupling portion formed by bending a part of a plate member, one end portion and the other end portion of the plate member being disposed to oppose to each other through a constant magnetic gap on a side opposite from the coupling portion, when a current to be measured flows to pass through a hollow portion of the core, the electric current sensor is configured to detect a magnitude of the current based on a magnitude of a magnetic flux generated in the core, wherein the core has a first tapered portion in which a width of the plate member continuously decreases from one end of the coupling portion adjacent to the one end portion to a distal end of the one end portion, and a second tapered portion in which the width of the plate member continuously decreases from an other end of the coupling portion adjacent to the other end portion to a distal end of the other end portion, and the width of the plate member is constant in the coupling portion from the one end adjacent to the one end portion to the other end adjacent to the other end portion.