| 摘要 |
PROBLEM TO BE SOLVED: To improve an insulation performance of a coil insulation layer.SOLUTION: A main insulator 114 is formed by winding a mica tape in a surrounding of an element wire 111, an element insulation 112, and an interlayer insulation 113. A corona prevention tape formed by mixing a carbon to a fiber glass as a substrate is wound to an outer peripheral surface of the main insulator 114, and a corona prevention layer 116 is formed. The corona prevention tape has a small coefficient of thermal expansion, the thermal expansion of main insulator 114 can be suppressed, the generation of a gap is prevented, a partial discharge in the gap is prevented, and an insulation performance can be improved.SELECTED DRAWING: Figure 1 |
