| 摘要 |
PURPOSE:To reduce a potential difference between an AC-side winding and a DC-side winding by a method wherein both windings wound on a core are formed by winding a sheet-shaped conductor and insulating paper and are disposed so that the low-potential sides thereof are opposite to each other. CONSTITUTION:The title transformer is formed by winding a tertiary winding 11 on a transformer core 10 formed of laminated electric iron plates, by winding an AC-side winding 22 further thereon and by winding further thereon a DC-side winding 23 connected to a thyristor valve. The AC-side winding 22 and the DC-side winding 23 are formed by winding a sheet-shaped conductor and insulating paper in a number of layers. In this sheet-shaped winding, the inner peripheral surface can be set as a neutral point potential N in a Y connection and the outer peripheral surface as a high-voltage potential element as is seen in the AC-side winding 22, for instance. In the DC-side winding 23, likewise, the inner peripheral surface can be set as a high potential element and the outer peripheral surface as a neutral point potential N. In such a state as described above, a voltage is not impressed substantially between the AC-side winding 22 and the DC-side winding 23.
|
