JPS6422012A - Gapped core type reactor - Google Patents

Abstract

PURPOSE:To obtain a core type reactor with a gap, in which the magnetic flux density distribution of a yoke core is equalized and the generation of internal compressive stress is inhibited and noises of which are reduced, by crossing the directivities of silicon steel plate punched plates of block cores, positioned at the upper and lower ends of a gapped core leg brought into contact with the yoke core, at right angles with the flowing direction of main magnetic flux and introducing the main magnetic flux to the yoke core. CONSTITUTION:The directivities 10a of punched plates for block cores 1a positioned at the upper and lower ends of gapped core legs 1 brought into contact with upper and lower yoke cores 4, 5 are crossed at right angles with the flowing direction of main magnetic flux 11, and the directivities 10b of other block cores 1b are made the same as that of the main magnetic flux 11. Accordingly, the main magnetic flux is moved radially in the block cores 1a and admitted to the yoke cores 4, 5, and the magnetic flux density distribution of the yoke cores 4, 5 is made uniform at the sectional central sections and both end sections of the yoke cores 4, 5, thus inhibiting the generation of magnetostriction at a low value.