SU1444901A1 - High-voltage winding - Google Patents

Abstract

The invention relates to electrical engineering. The aim of the invention is to improve reliability by increasing the longitudinal capacitance and electrical strength. The high-voltage winding consists of coils mounted on top of each other and connected in series. Each coil consists of conical layers 2, which are insulated from each other by stripping 3 strips of condenser paper, the outer diameter of the first layer and the inner diameter of the last layer of the coil at least two turns. smaller than all the other layers. The outermost turns of the first and last layers are on tapered screens 4, Layers 2 of the coil are compacted with glass tape 5, after which the coil is placed in a special volume, vacuum and impregnated with an insulating composition, e.g. zpoksid1 compound 1m, to 4.0 MPa. 2, il. I l qp O

Description

FIG. g

11444901

The invention relates to high-voltage technology, in particular to high-voltage transformer-type power sources, specifically to high-voltage winding, and can be used to create high-voltage

H

transformer type voltage sources.

The aim of the invention is to increase tea and training breaks.

devices under their potential.

In addition, at the corners of the cone, when complying with the relation -f. D-d 1

- -G 2

continues

capacity of the winding is approximately 2 ra, which reduces the overvoltage at

devices at a different potential.

In addition, at the corners of the cone of layers, when the relation -f is satisfied. D-d 1

- -G 2

increases longitudinally

the winding capacity is about 2 times, which reduces overvoltage during servicing

increase in reliability by increasing the longitudinal capacitance and electrical strength.

1 shows a high-voltage winding, a longitudinal section; 4shg, 2 - single coil construction.

The high-voltage winding consists of coils 1 mounted on each other and connected in series. Each coil consists of conical layers 2, which are insulated from each other by spacers 3 of capacitor paper. The first and last layers of the coil are designed in such a way that the outer diameter of the first layer and the inner diameter of the last layer are at least two turns smaller than all other layers. This provides a smoother configuration of the acute angles of the coil and more secure attachment of the turns of the first layer to the subsequent layer and eliminates the bending of the upper turns, which reduces the overvoltages between the layers and the turns. The outermost turns of the first and last layers are output to conical screens 4, which increase the longitudinal capacitance of coils 1 and, therefore, the high-voltage winding as a whole. After winding layers 2, the coil is pulled out with glass tape 5, after which it is placed in a special volume, evacuated, and then impregnated with an insulating composition, such as an epoxy compound, under pressure up to 4.0 MPa.

After the high voltage coils have been fabricated, the coils are mounted on each other and are electrically connected in series.

When the EMF is induced in the high-voltage winding in the joint area of one coil with another along the outer and inner diameter, the intensity of the electric field in the gaps between the coils and the high-voltage winding and other elements decreases

five

0

At the same time at a cone angle, at

Dd lg

where --- g, the longitudinal capacitance of the winding is significantly reduced, which worsens the conditions of the winding operation during breakdowns in both the load and the high-voltage source itself. In addition, it becomes almost impossible to wind layers of a coil, coils during winding begin to crawl, overlap, or the technology of winding conical layers dramatically complicates, virtually eliminating the advantages of the method of manufacturing a multi-layer high-voltage winding with conical layers.

At a cone angle at which

D-d., 1 T 2

deteriorating conditions

There are no extreme turns in the sharp corners of the winding, as a result of which overvoltages arise in the insulating gaps, which reduces the reliability of the windings. In addition, the number of turns increases dramatically, leading to an increase in interlayer voltage, and consequently to an increase in interlayer insulation, a decrease in the copper filling factor, an increase in size and, ultimately, a decrease in reliability.

The use of the proposed high voltage winding makes it possible to increase the longitudinal capacitance by more than 2 times, which will reduce overvoltages by more than 1.5 times, and improve the quality of the windings, especially in acute coil corners. All this allows to increase the reliability of the windings by more than 30-50%.

Claims (1)

Invention Formula A high-voltage winding containing high-voltage coils connected in series, consisting of series-connected layers of conical shape, located in the axial direction and impregnated with an insulating composition, forms a monolith, characterized in that, in order to increase reliability by increasing the longitudinal capacitance and electrical strength , the winding is equipped with conical screens, the extreme turns of the first and last layers are put onto conical screens, the outer diameter of the first layer of each coil has at least two turns less than the subsequent layers of the wrapper, and the inner diameter of the last layer of each coil - by  at least two turns less than the previous layers of the coil, and the cone angle of the layers is chosen from the ratio S 2 Dld 1 1 2 where D and d are the outer and inner diameters of the coils; 1 - the length of the generatrix of the conical layers, except the first and last. figure 1