STATIC APPARATUS

摘要

Disclosed is a static apparatus provided with an iron core (2, 42) which is composed of a plurality of magnetic plates (9, 49) stacked in one direction and which has a shaft portion (3, 43) having main surfaces (10, 44) and side surfaces (94, 45), and a coil (11, 51) wound around the shaft portion (3, 43). The main surfaces (10, 44) are opposed to the inner peripheral surface of the coil (11, 51) in a direction that the plurality of magnetic plates (9, 49) are stacked. The side surfaces (94, 45) are opposed to the inner peripheral surface of the coil in a direction perpendicular to the direction that the magnetic plates are stacked, and connect the main surfaces (10, 44) to each other. Slits (8, 48) extending in the axial direction of the shaft portion (3, 43) are formed in surface layer magnetic plates (97, 47) of the magnetic plates (9, 49), said surface layer magnetic plates constituting at least the main surfaces (10, 44). Some of the slits (8, 48) are provided on the surface sides (94, 45)-side end portions of each main surface (10, 44) at a predetermined density. The highest density of the slits (8, 48) corresponds to the predetermined density. The density of the slits decreases as at least either the shortest distance from the side surfaces (94, 45) within each main surface (10, 44) or the distance from the main surface (10, 44) on the side near the slits (8, 48) in the direction that the magnetic plates are stacked increases.