SU957287A1 - Method of producing transformer winding - Google Patents

Description

(54) METHOD OF MANUFACTURING TRANSFORMER WINDINGS

one

The invention relates to the technology of transformer windings and can be used in the field of electrical engineering.

A known method of manufacturing transformer windings involves simultaneous winding of electrically conductive and insulating tapes forming winding coils, while the width of the insulating tape is larger than electrically conductive, and its protruding edges are folded inwards in the radial direction at the ends of the coils 1.

The disadvantages of this method include the low reliability of the winding due to the low mechanical strength of the end insulation of the coils and the possibility of its damage when bending the insulating tape.

The closest to the proposed function and the achieved result is a method of manufacturing transformer windings, including the simultaneous winding of electrically conductive and insulating tapes forming winding coils, the insulating tape being fed from the bottom electrically conductive, and

the width is greater than the width of the electrically conductive tape, and after winding is completed, the protruding edges of the insulating tape are laid inward at the ends of the coil, insulating washers are placed on top and the coil is impregnated with an electrically insulating binder 2.

This method does not exclude the possibility of damage to the insulation by the ends of the conductive tape and has an increased

, (j laboriousness due to the need to bend an insulating tape, to manufacture and install insulating washers.

The purpose of the invention is to improve the quality of the windings by eliminating damage

15 isolation and reduction of labor input for manufacturing transformer windings.

This goal is achieved by simultaneously winding an electrically conductive and insulating tapes onto the surface of an insulating 2Q tape protruding behind an electrically conductive tape, winding a fibrous insulating material, for example glass cord.

Claims (2)

The drawing shows a cross section of the winding, wound the proposed method. The turns of the winding 1 are wound from an electrically conductive tape 2 and an insulating tape 3, the width of which is greater than the width of the electrically conductive tape 2. On the surfaces of the insulating tape 3, protruding beyond the edge of the electrically conducting tape 2, is wound a fibrous insulating material 4 in the form of a round glass cord. In the process of manufacturing winding 1, the insulating tape 3 is fed from the bottom of the electrically conductive tape 2 and at the same time winding round glass cord so that it tightly fills the voids between the insulating tapes of 3 adjacent turns at the ends of the winding, which are formed due to the width of the insulating tape 3 of the electrically conductive tape 2. For densely filling the voids of the cross section, the section of the glass cord is chosen larger than the area of the rectangle formed in the cross section of the winding between its end 5, the end face B of the electrically conductive tape 2 turns and surfaces 7 and 8 of the insulating tape 3 of two adjacent turns. After winding is complete, the winding is impregnated with an electrically insulating binder to provide the necessary electrical and mechanical strength. The insulating tape is not bent, which ensures high dielectric strength across the layers. The sufficient mechanical strength of the insulation is due to the dense filling of the ends with fibrous insulating material followed by impregnation with an electrically insulating binder, such as varnish or compound. In addition, the manufacturing complexity is reduced due to the elimination of manufacturing operations and the installation of insulating washers and the bending of insulating tape. The invention The method of manufacturing transformer windings, including the simultaneous winding of an electrically conductive tape and insulating, the width of which is greater than the width of an electrically conductive, and impregnation with a binder, characterized in that, in order to improve the quality of the windings by eliminating damage to the insulation and reducing the complexity of manufacturing, winding electrically conductive and insulating tapes onto the surface of the insulating tape, protruding beyond the conductive tape, wind the fibrous insulating material, for example stekloschnur. Sources of information taken into account in the examination. Switzerland patent No. 442506, cl. 21 d249, 1972. 2. Patent of Germany No. 1913329, cl. 21 d 49, 1973.