CORE MEMBER, GAPPED CORE, CURRENT SENSOR, AND METHOD FOR MANUFACTURING GAPPED CORE

摘要

The present invention provides a core member, a gapped core, and a current sensor in which the gap width of a core main body that is entirely or partially covered by a resin mold portion can be set as appropriate, and insulation between the core main body and a bus bar opening can be achieved. A core member 10 according to the present invention is a core member that includes a gap forming region C in which a gap 21 is formed. The core member includes an annular the core main body 20 having a bus bar opening 12 in which a bus bar 62 is disposed, a resin mold portion 30 that entirely or partially covers the core main body, the resin mold portion covering at least a portion of the gap forming region, and a resin bridge portion 40 whose both ends are continuously connected to the resin mold portion, and that is formed between an inner circumference side of the core main body and the bus bar opening, the resin bridge portion including a void 42 that is formed at a position opposing the gap forming region, and extends through the core member in a thickness direction of the core member between the resin bridge portion and the core main body or the resin mold portion.