| 摘要 |
PROBLEM TO BE SOLVED: To improve characteristics of a ring core as compared with a ring core which has the same cross section and is rectangularly sectioned by sectioning the ring core in an asymmetrical hexagonal shape which is larger at an inner peripheral side part than at an outer peripheral side part. SOLUTION: The ring core 10 is sectioned in the hexagonal shape formed by cutting both areas including outer peripheral side corner parts of a rectangle having inner peripheral sides and equal-length outer peripheral sides with two oblique sides or in a polygonal shape with curved portions obtained by cutting them with two curved lines. The hexagonal shape consists of a rectangular part on the inner peripheral side and trapezoidal parts on outer peripheral sides. COPYRIGHT: (C)2009,JPO&INPIT
|
