SU1091237A2 - Transformer - Google Patents

Abstract

TRANSFORMER by author St. No. 877633, for which, in order to reduce losses, material intensity and laboriousness of manufacturing and expand the functionality, at least one of the two adjacent shiftable turns of the outer winding is made of a larger diameter than the other turns of the winding, and is bent in radial direction. and axial directions to the end of the winding.

Description

The invention relates to electrical engineering, in particular to the manufacture of transformers. According to the main author. St. No. 877633 is known a transformer containing a core on which at least two windings are located, one of which is internal with a linear tap in the middle of the axial size of the winding, and the other is outer, having a free zone for the passage of a linear tap of the internal winding, while the outer windings windings are offset from the middle of the axial dimension to the ends of the winding so that the area free from turns forms on the part of the circle where the internal winding of the internal winding LlJ passes. The disadvantage of this design is Tot that free area for performing necessary radial passages between the coils. The presence of channels reduces the filling of the winding with conductor material, which increases its radial size, weight and electric power loss. To perform the channels, special insulating parts (gaskets, rails) are necessary, which leads to an increase in the complexity of winding manufacturing and the consumption of insulating material. In addition, this implementation of the free from the turns of the zone is impossible in the adjusting winding layer type (without radial channels between turns). The purpose of the invention is to reduce material consumption losses and manufacturing labor costs and to expand functional capabilities. The goal is achieved by the fact that in the transformer, at least one of the two adjacent displaceable coils of the outer winding is made larger than the other turns of the winding and bent in the radial and axial direction to the end of the winding. On 4ig. 1 shows a side view of the outer winding in a place free from windings in FIG. 2 is a view along arrow A in FIG. one; in fig. 3 - time cut 6-B in FIG. I; in fig. 4 shows an outside winding in which one of the adjacent turns is bent in the radial and axial directions, the other adjacent turn is only in the axial direction in FIG. 5, is a view along arrow B in FIG. 6 - section G-Y in FIG. 4j by 72 fig. 7 schematically shows a transformer. The outer winding (Figures 1 and 4) consists of turns I, which are numbered by the number of entries. In the middle of the axial size of the winding, zone 2 is free of turns for the passage of a linear tap of the high voltage winding due to a local (circumferentially limited) displacement of turns 1 from the middle of the axial size of the winding to its ends. 3. The offset is carried out by bending the coils with numbers 1B-U1B (Fig. 1-3) in the radial direction beyond the outer surface 4 of the winding and axially towards the ends 3. In this case, the bent coils image: / s additional layer of coils, pa) an allele outer surface 4 of the winding (FIG. 3). These coils in the area of the free zone have a diameter larger than that of the outer surface 4. According to FIG. 4-6, the windings are offset in pairs. Part of the displaced turns with numbers 1B-U1B (Fig. 4 and 6) is bent in the radial direction beyond the outer surface 4 of the winding and in the axial direction to the ends 3. The other part of the turns with numbers 1A-U1A adjacent to the turns of the first part, is bent only axially to the same ends .3. At the same time, the coil windings adjacent in the axial direction after displacement are located close to each other in the radial direction, for example, 1UA and PV, 1A and ВV, UA and UV (Fig.6, upper part). The number of displaceable turns, which are bent in the radial direction of the SRI beyond the outer surface of the winding, is chosen constructively depending on the required size of the free from the windings zone, which is specified by the class of the linear tap voltage. This quantity is also influenced by the structure of the external winding, the axial size of its turn, and the size of the channel between the turns (the larger they are, the less it is necessary to bend turns). As far as possible, all displaceable turns can be bent in the radial direction, as shown in FIG. I and 3. In FIG. 4 and 6 shows a variant where approximately half of the displaced turns are bent in the radial direction. The manufacture of a transformer according to the invention can be carried out according to the existing technology on existing equipment. It is advisable to carry out the bending of the turns in the process of winding the adjustment winding on the machine. The fastening of the folded coils depends on the use of the proposed solution and is determined by the designer in working order. In the upper part of FIG. Figures 1 and 3 show the fastening of bent coils using insulating strips 5 (for example, from a cardboard), which are attached to the outer surface 4 of the winding with insulating tape 6 (for example, from fiberglass). If necessary, an additional support for the turns in the free zone can be an insulating ring 7, for example, made of electric cardboard. At the bottom of FIG. Figures 1 and 3 illustrate the method of fastening the foldable turns by bandaging them to unbent turns using insulating tape 6 (paper, fiberglass, kiperny tape, etc.). The transformer contains on the core shaft 8 an inner winding 9 with a linear tap 10 in the middle of its axial size and an outer winding 11 having a winding-free zone 2 for the passage of a linear tap 10. It should be noted that a strong attachment of the folded turns is not required, as the folded turns at the flow through them of the working and emergency currents are compressed between themselves and attracted to the unbent coils due to the fact that the currents in the indicated; round heads have the same direction. The proposed solution can be used with any type of external winding (adjustment, tertiary, etc.). If the coil contains several parallel conductors along the height of the winding, for example two, then it is advisable to bend one of the adjacent parallel conductors in the radial and axial directions, and the other only in the axial direction, with a pairwise displacement.

Fig.Z

Vad figl

7B

nn

W

extra

/ / / / / / X / / /

l

//

FIG. 7

Claims (1)

TRANSFORMER by ed. St. No. 877633, characterized in that, in order to reduce losses, material consumption and the complexity of manufacturing and expanding functionality, at least one of two adjacent displaceable turns of the outer winding is made of a larger diameter than the remaining turns of the winding, and bent in radial and axial directions to the end of the winding. (L s about with number With m> U91237