| 摘要 |
PURPOSE:To enhance the reliability of an armature coil holding device by inserting a semiconductive insertion plate which mainly contains a semiconductive plate formed as essential base materials of aromatic polyamide, conductive fiber and high molecular fibrid, into the gap between the armature coil and a core slot. CONSTITUTION:A semiconductive insertion plate 11 is inserted at both sides into widthwise gap between an armature coil 2 and a core slot 1a. The plate 11 mainly contains a semiconductive base plate formed as essential base materials of aromatic polyamide, conductive fiber and high molecular fibrid, has excellent heat resistance, moisture resistance, is preferably impregnated with resin, does not vary in its resistance value before and after the impregnation, and has small coefficient of friction and large mechanical strength, thereby enhancing the electric field alleviating action of a high voltage armature coil. |
