DD265486A1 - PILLARS IN ADJUSTABLE TRANSFORMERS WITH CENTRAL SPREADING - Google Patents

Abstract

The invention relates to step coils in variable transformers with center discharge of the main winding. In such variable transformers to be achieved in the two-part control winding that despite odd step turn number start and end of the coil halves on a generating line and thus the series switching connections of the coil halves on the side of Spulenausleitungen to the tap changer, the axial mass of the coil halves and their Amperewindungszahlen are almost equal. This is achieved in that both coil halves (11, 12) have an integral number of turns per stage, wherein in one coil half (11 or 12) half of the individual coils (1, 3, 5, 7, 9, and 8, 6 4, 2) has one turn less than the associated half of the individual coils (1; 3; 5; 7; 9; 8; 6; 4; 2) in the other coil halves (12 or 11) and in each case the individual coils (1; 3; 5; 7; 9 or 8; 6; 4; 2) of one half of the individual coils of one coil half (11 or 12) with the individual coils (1; 3; 5; 7; 9 or 8; 6; 4; 2) of the one half of the winding of the individual coils of the other coil halves 12 or 11) are interconnected electrically in series. figure

Description

Field of application of the invention

The invention is applicable to Stoll transformers in which, because of the center discharge of the main winding, the actuating winding is arranged in two separate parts connected in series.

Characteristic of the known state of the art

It is generally known that windings whose tension is adjustable under load consist of an internal parent winding and a coarse and fine-grade layer lying above it, or a fine-stage layer connected and counter-connected.

In order to minimize the dynamic stresses on the fine-stage layer, it must be ensured that the most uniform possible distribution of the ampere-turns over the entire layer length is achieved with each position of the tap changer.

This is achieved by winding the fine stage layer with η nested gears over the entire length of the length when η is the rounded-off half of the positions of the tap changer. The individual gears of the position are assigned in a suitable order don positions of the tap changer.

If the main winding is now designed with center discharge, this discharge must be guided through the radially overlying fine-grade layer. In such cases, the Feinstufenlapa is wound as two equal half-coils, which are pushed in Montagepiozeß on the parent winding and connected to each other. When connecting the two halves of the halves in parallel, this connection can be done on the tap changer, as this z. B. in OE-OS 1513971 and 1138464 specified let.

When connected in series, the ply halves are connected directly to the winding.

If the number of turn turns is even, each half of the winding is executed with an integer number of turns. Thus, the beginning and the end of each of the nested coils lie on the same generatrix of the outer cylindrical surface.

In the case of odd number of turns, the beginning and the end of each of the nested coils are circumferentially offset by 180 ° and the connection between the two halves of the coil must be made in a space which usually has to be used to dissipate other windings. This leads to larger necessary distances, which increase the Maßo and the mass of the transformer.

Goal of the experience;

The aim of the invention is to provide at odd step winding number such training and Serienschaitungsverbinduny the step coils for transformers with center discharge of the trunk winding that the dimensions and the mass of the transformers do not increase over the transformers with even Stufenwindungszahl.

Essence of the invention

DIo technical task

The invention is based on the object at odd Stufenwindungszahl the step coils in such a way that the beginning and end of the coil halves on a generatrix and thus the series switching jngsverbindungen the coil halves lie on the same Seito the winding on which the Spulenausleitungen the tap changer, wherein the AxialmaUe the coil halves and the Ampurewindungszahlen in them should be at least almost equal.

The technical costs to solve the problem Je

According to the invention, the charge is achieved in that both SpulenhSIften have an integer number of turns per stage, wherein in one Spulen'ihälfte half of the individual coils has one turn one turn less than the corresponding half of the Einzelspuien in the other coil half and joweils the individual coils of to a Windur.g shorter half of the individual coils of a coil half with the corresponding individual coils of the longer by one turn half individual coils of the other coil half are electrically connected in series.

exemplary

The invention will be below to an Ausführungsbeispic! be explained in more detail. The drawing shows a schematic representation of the invention.

Required are as a step coil nine ineiner, rgevveloptte individual coils, each with 11 turns, which are divided into two coil halves 11, 12, which are electrically conductively connected to each other via the central gap 'J. In the coil half 11, the individual coils 1 ', 3', 5 ', T, 9' with five turns and the individual coils V, 3 ', S', 7 ', 9' six turns and the individual coils 8 ', 6' , 4 ', 2' executed with six turns. In the bobbin hoops 12, the individual coils 8 '. 6 ', 4', 2'je five turns. The series electrical connection of the coil halves 11,12 on the central gap 13 is done by connecting the coil ends of the same designated coils in the form shown in the drawing. It can be clearly seen that the individual coils 1 ', 3', B ', 7', 9 'are connected to five turns of the coil half 11 with the same-named individual coils with six turns of the coil half 12, selecting the individual coils 8', 6 ' , 4 ', 2' are connected with six turns of the coil half 11 with the same individual coils with five windings dor coil half 12.

Claims (1)

Stages coils in variable transformers with center discharge of the main winding and with a two separate, axially superimposed and connected in series parts of the control winding with odd step turn number, characterized in that both coil halves {11; 12) have integer number of turns per stage, wherein in the one coil half (11 or 12) the half of the individual coils (V; 3 ';5'; 7 ';9' or 8 ';6'; 4 ';2' ) has a smaller number of turns than the associated half of the individual coils (V; 3 ';5'; 7 ';9') in the other coil half (12 or 11) and in each case the individual coils (V; 3 ';';7'; 9 'or 8'; 6 ';4'; 2 ') of the half of the individual coils of one coil half (11 or 12) which is shorter by one turn with the single coils (V; 3'; 5 '; T) 9' and 8, respectively; 6 '; 4 '; 2 ') of the one turn longer half of the individual coils of the other coil half (12 or 11) are electrically connected in series. For this 1 page drawing