| 摘要 |
PURPOSE:To obtain a high voltage rotary electric machine coil having high starting voltage of surface discharging and small irregularity by edgewisely winding a field alleviating sheet on a coil linear portion from a low resistance corona preventing end of a high surface field to the starting end of a curved portion. CONSTITUTION:A mica tape or sheet is wound on a conductor 2 to form a ground insulator 3. Then, a low resistance corona preventive tape or sheet is wound in a range of approx. 10-50mm. at both ends from the length of a core 1 to form a low resistance corona preventing layer 4. Then, SiC particles are filled in thermosetting resin, coated on a glass cloth at the end superposed at 10-30mm. in a semicured field alleviating sheet cut in a rectangular shape to edgewisely wind on the coil ground insulator 3 to form the first field alleviating layer 6. Then, a tape formed similarly by superposing at 10-30mm. on the end of the layer 6 is lap-wound in the prescribed range including the coil bent portion to form the second field alleviating layer 7. |
