| 摘要 |
PURPOSE:To shorten the impregnation time and thus the manufacture time by inserting into a coil insulating layer a spacer of a polyester nonwoven fabric or an aromatic polyamide paper, etc., having good insulating properties and high adhesion to an impregnating insulation synthetic resin. CONSTITUTION:On a core 1 are wound 2-3 layers of a releasing paper, and as an inner insulating paper 2 an aromatic polyamide paper and a polyester nonwoven fabric are stack-wound thereupon. In this process tape-or rod-shaped spacers 3 of a polyester nonwoven fabric, 5-10mum in thickness, having good insulting properties and high adhesion to an impregnating insulation synthetic resin, are wound in the direction of the axis of the core 1 into the inner insulating paper 2 4-8 places/turn to form an inner insulating layer 4. On this insulation layer are wound one layer of a conductor, an insulating layer and the necessary layers of a blank coil. A leakage stop seal layer is formed on the circumference of the blank coil and one end surfaces. The coil is then put into an impregnating insulation synthetic resin tank where it is impregnated with an insulation resin. Then the coil is heated to harden the resin. This improves the impregnation speed and eliminates the use of a metal mold. |
