| 摘要 |
PROBLEM TO BE SOLVED: To provide a current sensor capable of reducing influence of external noise and reducing costs.SOLUTION: A current sensor includes a magnetic substance core 20 surrounding a conductor 10 in which an electric current I flows. The magnetic substance core 20 forms a first gap 22 in which a first magnetic field measurement element 40 for measuring magnetic field H formed by the electric current I is placed. A cross section of an edge of the magnetic substance core 20 of the first gap 22 is smaller than a cross section of the magnetic substance core 20 of areas other than the first gap 22 in the magnetic substance cores 20. |
