| 摘要 |
PROBLEM TO BE SOLVED: To provide a stationary induction apparatus iron core that prevents reduction in a magnetic characteristic while forming an aperture at the center of a yoke formation part.SOLUTION: A stationary induction apparatus iron core including U-shaped leg iron cores 2, 3 and 4 including a pair of yoke formation parts 2b, 3b and 4b bent at both ends of leg parts 2a, 3a and 4a so as to face each other is configured by making the yoke formation parts of the three leg iron cores abut on each other so that each angle around a predetermined point between the leg parts is approximate 120 degrees. Each of the three leg iron cores is divided into two in the circumferential direction; tips of both yoke formation parts of each of division leg iron cores 5 and 6 obtained by the division are cut so as to form cross sections 5c and 6c inclined with respect to side surfaces of the yoke formation parts. A magnetic path is formed by adjacent two division leg iron cores of two leg iron cores adjacent to each other. An aperture 7 having a triangular planar shape is formed at the center part of the yoke formation parts by a side surface or cross section of a yoke formation part of one division leg iron core of each of the three leg iron cores.SELECTED DRAWING: Figure 1 |
