| 摘要 |
PROBLEM TO BE SOLVED: To provide a current sensor capable of suppressing stress acting on a core of the current sensor which is formed by insert molding.SOLUTION: A current sensor 100 comprises: a magnetic core 20 that surrounds a busbar 10 in which measurement current flows, and that has an opening 49 on a pathway surrounding the busbar 10; a detecting element 30 for detecting magnetic field intensity, that is disposed in the opening 49 so that a detecting direction follows an interval direction B of the opening 49; a first resin 40 covering an outer peripheral surface 25 of the core 20; and a second resin 50 that is provided between an outer peripheral surface 11 of the busbar 10 and an inner peripheral surface 24 of the core 20 and also provided so as to cover an outer peripheral surface 41 of the first resin 40, and that has a linear expansion coefficient smaller than the linear expansion coefficent of the first resin 40. |
