| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a low-cost current detector which can detect an AC current and at the same time function as a line filter. SOLUTION: A pair of electric wires 20a, 20b are wound in opposite phases to a ring core 10, having no slit in a circumferential direction. Numbers of turns at winding parts 21a, 21b of the wires 20a, 20b are made different. A magnetism-sensitive element 30 is arranged between the winding parts 21a and 21b. An AC current running in the wires 20a, 20b is detected from the output of the magnetism-sensitive element 30. Because of the opposite phases of the winding parts 21a, 21b, noises on the AC current are removed.</p> |
