| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a DC current sensor which prevents an exciting signal from being mixed with a detecting signal and in which only a signal corresponding to a DC current flowing in a conductor to be measured can be captured by a detecting coil. SOLUTION: An excitation coil 3 is wound on a core 1 and a core 2 in such a way that opposite-phase magnetic fields are formed, while, a detection coil 4 is wound collectively on both cores 1, 2, an AC power supply is connected to the excitation coil 3, a conductor 7 to be measured is passed through and arranged at the center of both cores 1, 2 and the AC power supply is connected to the excitation coil 3.</p> |
