| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a coil apparatus which can suppress heat generation of a coil pattern which is caused by leakage magnetic flux from a core. SOLUTION: The coil apparatus is provided with a substrate 2 wherein coil patterns 3a, 3b are formed on the surface and the rear, and a core which is inserted in a core through hole 4 formed in the substrate 2, which is constituted of a printed circuit board. Each of the coil patterns 3a, 3b has a part 7a arranged inside the core 5, and a part 7b connecting end portions of the part 7a. Both of the coil patterns 3a, 3b are constituted of split coil patterns 8a-8e, 9a-9e wherein the part 7a is divided in plural parts in the width direction. Each of the split coil patterns 8a-8e, 9a-9e are formed thin in order that influence of leakage magnetic flux from a core gap may be equal and that a path of an eddy current generated in each of the split coil patterns 8a-8e, 9a-9e may be small.</p> |
