| 摘要 |
PURPOSE:To manufacture a miniaturized and light-weighted foil wound transformer with high dielectric strength by leading out high voltage lead wire from the highest potential part outside a high voltage winding through the central part of low voltage windings by a method wherein the potential of high voltage winding arranged inside the low voltage windings is raised as near as the outside while the low voltage windings are divided into upper and lower two parts. CONSTITUTION:A high voltage winding 12 comprising an overlapped metallic sheet and an insulating sheet wound around an iron core 2 as well as low voltage windings 5, 11 concentrically wound around the same are sealed up in a grounding tank 1 together with an insulating medium 4. In such a foil wound transformer, the potential of high voltage winding 12 arranged inside the low voltage windings 5, 11 is raised as near as the outside while the low voltage windings 5, 11 are divided into upper and lower two parts to lead out a high voltage lead wire 10 from the highest potential part outside the high voltage winding 12 through the central part of the windings 5, 11. Through these procedures, the distance 15 to tank and the other distance 14 to yoke can be reduced markedly so that the foil wound transformer may be miniaturized thereby light-weighed to reduce the magnetism loss while stabilizing the insulation due to the high potential part not facing to the tank.
|
