Layer winding for electrical equipment
AssigneeMWB Messwandler-Bau AG
InventorOtto Graul
Life of this patent
Estimating the term…
Abstract
A layer winding for transformers, measuring transformers, choke coils or the like is to be so improved that the insulation of such a layer winding exhibits practically no free spaces in the insulating tape edge areas. This is assured by the method of manufacture in that when reaching the outer end face (12) of a layer winding edge (4), the insulating tape (2) is continued to be wound and the band portion (13) of the insulating tape (2) which projects beyond the edge face (12) is continuously cut off. The remaining residual portion of the insulating tape (15) is then continued to be wound with zero pitch for such length of time until the free spaces which otherwise occur at the layer winding edge (4') are filled out.
Claims4
A layer winding for transformers, measuring transformers, choke coils and coils for other inductive apparatus having insulating layers and winding layers consisting of insulating tapes and conductors, respectively, which alternate with one another, wherein the respective insulating layer is wound at the same time and in the same direction with the winding layer wound on the insulating layer and the insulating tape has a larger width than the width or diameter of a conductor, and in which the insulating tape is wound at least within a larger section of an insulating layer with a larger pitch than the conductor and an edge of insulating material of twice the height of a winding layer is established at edge areas of the winding layers, and wherein the width of the insulating tape adjacent an outer end face of a layer winding edge area has a continuously reduced portion of about 15 to 30 percent of its width along the conductor between the outer edge areas of the layer winding, the continuously reduced portion of the insulating tapes being terminated with a free end approximately at the outer end faces of the layer winding edge areas, and wherein free spaces occurring at the edge areas toward the outer end faces of the winding layers during the winding of insulating layers with predetermined pitch are compensated by being filled with coaxial windings of residual tape in the outer edge zones of the edge areas, said residual tape also being terminated with a free end approximately at the outer end faces of the winding edge areas.
Dependencies are inferred from the claim text.