| 摘要 |
PURPOSE:To reduce intrusion to be generated in the layer of the winding start and the layer close thereto at the acute angle part of a flat air-core coil by a method wherein the inside shape of the coil wound round for the necessary number of turns is formed in a shape having the enlarged angle thereof according to a slope provided to one side of the acute angle (including a right angle). CONSTITUTION:A three layer thin belt (d) wound around a core 11 is accommodated in a jig 12, and covered with a jig 13 from the upside. After, then, the jig 13 is pressed to the jig 12 according to screws 21, external pressure is applied to the three layer thin belt (d) to mold the external shape into the necessary shape, and respective layers are bonded. At this time, although a distortion is generated to the acute angle part according to relaxation of windings and expansion at heating time, while by forming the slope of the angle theta to the beta2 side, the inside layer parts meander at the acute angle part to absorb the distortion thereof without reducing length of alpha. Accordingly, generation of strong intrusion can be checked. |
