CURRENT SENSOR

To provide a current sensor with a structure that current field derived in a current path next to a current path targeted for measurement is hard to be given as noise field to a magnetic sensing element detecting the current path targeted for measurement.SOLUTION: A first shield 11u and a second shield 12u are provided at a position across current path 2u of U phase and magnetic sensing element 5u. An outside end E2 of a second facing plane 13w of the second shield 12u is located between an outside end E1 of a first facing plane 13u of the first shield 11u and the magnetic sensing element 5u. An angle α between a magnetic line of force M2 caused by driving current flowing through a current path 2v of V phase and entering to the magnetic sensing element 5u, and an element vertical line Sv can be made small, and current field becomes hard to be detected by the magnetic sensing element 5u as noise field.SELECTED DRAWING: Figure 4 【課題】 計測対象となる電流路の隣りの電流路で誘導される電流磁界が、計測対象の電流路を検知する磁気検知素子にノイズ磁界として与えられにくい構造の電流センサを提供する。【解決手段】 Ｕ相の電流路２ｕおよび磁気検知素子５ｕを挟む位置に、第１シールド１１ｕと第２シールド１２ｕが設けられている。第２シールド１２ｕの第２対向平面１３ｗの外側端部Ｅ２が、第１シールド１１ｕの第１対向平面１３ｕの外側端部Ｅ１と磁気検知素子５ｕの間に位置している。これにより、Ｖ相の電流路２ｖに流れる駆動電流に起因して磁気検知素子５ｕに入る磁力線Ｍ２と素子垂直線Ｓｖとの角度αを小さくでき、磁気検知素子５ｕでノイズ磁界として検知されにくくなる。【選択図】図４