| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a small-sized stationary induction apparatus of high insulating reliability by a method, wherein the electric field of corner part of the winding conductor of a disc-shaped winding is reduced, the insulation intensity of the winding is enhanced and the dimension and the weight of the apparatus are decreased. SOLUTION: In this apparatus, a plurality of disc-shaped coils 2, which re wound on the winding conductor 3 insulated by an insulation-coating 4, are stacked in axial direction and are series-connected, the radial directioned duct piece 5 between each coil 2 is arranged equally radially on the circumference, and a radially-directed cooling duct piece 6 is formed. A longitudinal duct piece 7 is arranged on the notched part provided on the inner terminal of the radial duct piece 5, the radially directed duct piece 5 is arranged equally and fixed on the circumference of the disc-shaped coil 2, and a longitudinal direction duct piece 8 is formed. A shield conductor 9, having a potential equal to that of the winding conductor 3 of the innermost side of the disc-shaped coils 2 and having a<b relation between the width (b) of the winding conductor 3 in winding axial direction and the width (a) of a shield conductor 9, is wound by one turn in 9 disc form on the inside in radial direction of the winding conductor 3 of the coils 2, and a disc-shaped winding 1 is constituted.</p> |
