| 摘要 |
PURPOSE:To increase the creeping distance by perforation at the end of the insulation sheet of a winding with insulation and metallic sheets wound by superposition, and then bundling up the insulation sheet through holes. CONSTITUTION:The insulation sheet 3 and the metallic sheet 2 are wound by superposition outside an iron core, and thus a winding of foil winding system is formed. The holes 16 are bored at the ends of the sheet 3, which is bundled by the passage of a string 17 or a tape through the holes, resulting in unevenness of the ends of the winding. It is suitable that the distance between bundles is 0.7-2 times as large as the length from the end of the sheet 2 to that of the sheet 3. |
