| 摘要 |
PROBLEM TO BE SOLVED: To provide a coil device that has small Rdc while the size is compact, and is suitable for using as a current sensor.SOLUTION: A coil device has a core body 82 having a core portion 84 around which a wire can be wound and coupling plate portions 86 each extending from both sides of the core portion 84 to form a loop-shaped magnetic circuit. A second aspect ratio of a cross section of the core portion 84 is smaller than a first aspect ratio of a cross section along the loop of the coupling plate portions 86. |
