| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing an iron core for stationary induction apparatus in which increase in magnetic flux leakage or iron loss is suppressed as much as possible, by reducing junction in a flux path as much as possible when a magnetic flux flows from one leg to an adjacent leg, while taking advantages of a Y-shaped iron core.SOLUTION: An iron core for stationary induction apparatus includes three substantially U-shaped block iron cores 24A, 25A, 26A, each having one leg and yoke formation parts at both ends of the leg. While these three block iron cores are arranged so that the legs are arranged at about 120 degrees around a predetermined point, the yoke formation parts are made to butt at each other. When manufacturing this iron core, three rectangular frame iron cores 21, 22, 23 of two kinds or three kinds are provided. These three frame iron cores are divided, respectively, into two at the yoke formation parts, thus forming a total of six block iron cores 24A, 24B, 25A, 25B, 26A, 26B. Iron cores 20A, 20B for two sets are obtained by combining three block iron cores out of these six block iron cores. |
