| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To realize miniaturization and weight reduction by preventing insulation deterioration or breakdown of the mold, regarding a dry high breakdown voltage transformer and an electric conduction coating single molded coil for a high breakdown voltage transformer. <P>SOLUTION: An inner coil 1 of a small diameter and an outer coil 2 of large diameter are molded into a single respectively by using insulator. In each of the single molds 3, 4, an inner and an outer edges are formed in a shape with circular cross sections, and electric conduction coating 7 and 8 are performed by using a conductive coating material. Both of the conductive coating single molded coils A, B which are formed to float at the potential corresponding to the respective coils are arranged concentrically at the outer side and the inner side. Further, double molding is correctively performed by using the insulator, and overall electric conduction coating 10 is also performed to the double mold 9 by using the conductive coating material. A window hole 11 is opened in a proper place, and lead-out lines 15, 16 of a high voltage side coil are made to penetrate the center part of the window hole 11. A corona ring 17 is attached to a hole edge of the window hole. An overall conduction coating double molded compound unified coil C is formed and attached on a magnetic core 22, and the magnetic core and the overall conduction coating 10 are electrically connected. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
