| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a current sensor capable of securing measurement accuracy by suppressing magnetic saturation in current measurement and capable of reducing size and cost. <P>SOLUTION: A current sensor 1 includes an iron core part 102 formed like a circular shape to collect magnetic flux generated by a primary current flowing into a current line 101 to be measured which is arranged through the center part of the circular shape and winding 103 wound around the iron core part 102 in a toroidal direction to detect a magnetic flux change in the iron core part 102 and is configured to measure the primary current from an output of the winding 103. The iron core part 102 includes a core division area Km in which a plurality of grooves 107 are arranged along the toroidal direction and a core connection area Ks connected in the toroidal direction. In the core division area Km of the iron core part 102, a ratio of a cross section of the iron core part 102 to a cross section of the groove 107 in a section of a diameter direction is fixed over a toroidal circumference. <P>COPYRIGHT: (C)2013,JPO&INPIT |
