| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase a space factor of a conductor in comparison with conventional air-core coils, in an air-core coil where unit coil parts formed by spirally winding a conductor 22 are repeatedly arranged in a winding axis direction, each coil part is formed of a plurality of unit winding parts 25, 26, and 27 different in inner circumferential length from each other, and at least a part of a unit winding part having a short inner circumferential length is pressed into a unit winding part having a long inner circumferential length. <P>SOLUTION: In the air-core coil, each of the plurality of unit winding parts 25, 26, and 27 forming each unit coil part has a polygonal shape having a plurality of corner parts 23a, and each of the plurality of corner parts 23a comprises a plurality of bending parts 25a, 26a, and 27a formed by bending the conductor 22 at obtuse angles and one or more connection parts 25b, 26b, and 27b for connecting adjacent bending parts to each other, and the plurality of bending parts 25a, 26a, and 27a overlapping each other in the same phase position are arranged on one line at each corner part 23a. <P>COPYRIGHT: (C)2013,JPO&INPIT |
