Current sensor and method for manufacturing a current sensor

Abstract

A current sensor 1 of the present invention, comprising a soft magnetic body with a plurality of laminated plates of soft magnetic material and achieving high measuring accuracy with a minimal positional deviation, wherein the positional deviation arises during insert molding in the soft magnetic body, comprises: a housing 2; a core element 3 formed by laminating a plurality of plates of soft magnetic material 30, wherein the core element 3 is cast into the housing 2; and a magnetic sensor 4 that measures magnetism. The core element 3 has plates of soft magnetic material 31 and plates of soft magnetic material 32, which differ in shape from the plates of soft magnetic material 31.The plate made of soft magnetic material 32 has an exposed section 32S which, viewed in the lamination direction of the plates made of soft magnetic material 30, is not covered by the plate made of soft magnetic material 31. The outermost layer on at least one surface of the core element 3 is the plate made of soft magnetic material 31.