| 摘要 |
PURPOSE:To obtain a magnetic core for non-linear choke having a simple structure and excellent performance by providing a gap in a portion of an annular magnetic core consisting of a soft magnetic material, and inserting into the whole or a part of the gap a gap spacer made of a soft magnetic material, the resistivity of which has a value sufficiently large as compared with the resistivity of the magnetic core. CONSTITUTION:A gap is provided in a portion of a magnetic core 1, 1' or 2 consisting of a soft magnetic material, and in the whole or a part of the gap, a member made of a soft magnetic material the resistivity of which has a value sufficiently large as compared with the resistivity of the magnetic core 1, 1' or 2 is inserted and arranged as a gap spacers 3, 3'. A thin amorphous alloy band is made by the one-side roll method, the obtained thin band is wound to make a magnetic core 2 having an outer diameter of 35mm, inner diameter of 20mm and thickness of 10mm, and the predetermined heat treatment is performed. After this is impregnated with epoxy resin and is hardened, a part of the magnetic path is cut by means of a grindstone so as to form a 0.8mm gap. A soft magnetic plate 3' made of a pressed powder of ferrite or permalloy having a shape of 15X15X0.8<t>mm is inserted into this gap portion and is fixed by means of an adhesive. |
