| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a current sensor capable of canceling influence of unnecessary magnetic field existing in a measuring environment for realizing current measurement with high accuracy. SOLUTION: Conductive bodies 21, 22 are arranged in parallel with each other on the same plane and make respectively reverse measurement currents flow therein. A magnetic sensor 23 detects a horizontal magnetic flux of magnetic fluxes generated around the conductive body 21 and outputs an electric signal according to the flux while it is structured not to sense outside magnetic field in the vertical direction. A magnetic sensor 24 detects a horizontal magnetic flux of magnetic fluxes generated around the conductive body 22 and outputs an electric signal according to the flux while it is structured not to sense outside magnetic field in the vertical direction. A subtraction circuit (not shown) subtracts the output of the magnetic sensor 23 and that of the magnetic sensor 24.</p> |
