| 摘要 |
PURPOSE:To improve the thermal conduction and to improve the reliability by coating putty insulator on the end of a mica insulating layer to form a uniform powder insulating layer. CONSTITUTION:A mica insulating layer 6 of mica tape is coated in the range of a coil end including slots at a sole coil time. Then, a putty insulator 8 made of thermosetting resin such as epoxy resin is coated to cross over between the coil conductor and the mica insulator at the end of the layer 6. In order to harden the insulator 8 and to improve the powder painting on the coil end, the coil is preliminarily heated, dipped in a fluid dipping tank to the range to be suitably lapped to the layer 6 at the coil end, thereby forming a powder insulating layer7. The insulator 8 may use a material which contains a filler of good thermal conductivity such as alumina in thermosetting resin. |
