| 摘要 |
PURPOSE:To prevent the thermal damage of a field alleviating layer by providing a semiconductive layer in a main insulating layer interposed between the field alleviating layer and a conductor, thereby reducing the power loss in the field alleviating layer. CONSTITUTION:Conductive paint is coated to the involute part of a stator coil 3 on the surface of a main insulating layer 4 of a stator coil 3 which is covered on the conductor 4 with the main insulating layer 4 to form a low resistance corona shielding layer 6, and a field alleviating layer 7 having a non-linear resistance characteristic connected to the layer 6 is formed on the surface of a main insulating layer 5 at the terminal side of the layer 6. A semiconductive layer 8 made of aromatic polyamide paper mixed with carbon fiber is, for example, formed in the range shorter than the layer 7 in the layer 5 between the layer 7 and the conductor 4, which includes the seamed part between the layers 6 and 7. |
