| 摘要 |
PROBLEM TO BE SOLVED: To provide a current sensor that can increase sensitivity by increasing a magnetic flux leaking to a magnetic field sensor when detecting a current.SOLUTION: A current sensor 1 is configured to cause a current flowing to a busbar 9 to generate a magnetic field inside a feedback core 3; detect a magnetic flux in this instance by a magnetic field sensor 6; supply a current corresponding to a detection result by the magnetic filed sensor 6 to a feedback coil 4; and detect the current flowing to the busbar 9 by a current value supplied to the feedback coil 4 at a point of time when cancelling out the generated magnetic filed by the current flowing to the busbar 9. In the feedback core 3, on both sides in a Y-direction relative to the magnetic filed sensor 6, provided are a first magnetic gap 306 in which a fourth core unit 34 and fifth core unit 35 of the feedback core 3 are separated in an X-direction and a second magnetic gap 307 in which a sixth core unit 36 and seventh core unit 37 of the feedback core 3 are separated in the X-direction. |
