| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a direct-current sensor and a direct-current detector capable of preventing conductors from being affected by excitation signal for detecting a direct current flowing in the conductor. <P>SOLUTION: The conductor with the flowing direct current is inserted through a constitution, wound with the first excitation coil onto the first magnetic core, and wound with the second excitation coil onto the second magnetic core, having a magnetic saturation point higher than that of the first magnetic core, which are connected in parallel; the two excitation coils are excitation-driven by an alternating current signal; and the first alternating current voltage and the second alternating current voltage with matually reverse phases are induced and offset, and the direct current I flowing in the conductor is detected. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
