| 摘要 |
<p>Provided is a coil device in which an insulation breakdown between unit winding portions can be suppressed effectively and which can be easily formed by hand winding. The coil device according to the present invention includes a ring-shaped core 1 and at least one coil 2 formed by continuously winding one conductor wire around the core. The coil 2 is formed by a plurality of unit coil portions 24 successively formed along a direction of a magnetic path of the core 1, the adjacent unit coil portions are electrically connected to each other at only one position, each of the unit coil portions 24 is formed by a plurality of unit winding portions 21, 22, and 23 stacked at least on an inner peripheral side of the core, and a layered structure of each of the unit coil portions 24 at least on the inner peripheral side of the core is formed by stacking the one unit winding portion 23 on the two unit winding portions 21 and 22 in a lower layer.</p> |
