| 摘要 |
PURPOSE:To suppress the temperature rise in a field alleviating layer by providing a nonlinear resistance layer in contact with the end of a semiconductive layer formed in a main insulating layer of a stator coil. CONSTITUTION:A mica tape is wound to 1/2 of thickness on the prescribed position of a main insulating layer 3 on the outer periphery of a conductor 2 of a stator coil 1, a semiconductive tape having a resistivity of 10<6>ohms in length and thickness of 0.1mm. is wound at the coil end side of 100mm. long at a stator core 1 side from a seam between a low resistance corona shielding layer 4 and a field alleviating layer 5 as a reference position, and a conductive layer 6 is provided. Further, an SiC dry tape having nonlinear resistance characteristic is wound in length of 50mm. at the coil end side in contact with the coil end side of the layer 6, and a nonlinear resistance layer 7 is provided. Further, the remaining mica tape is wound on the outer periphery to form the layer 3. |
