SU938323A1 - Converting transformer valve winding - Google Patents

Description

(54) VENTILATION OF THE TRANSFORMER TRANSFORMER

one

The invention relates to electrical engineering, in particular, to transformer manufacturing, and can be used in high-power converter transformers operating in a 12-phase equivalent rectifier circuit.

A valve winding of a transformer transformer is known that is split into an even number of parts, | d the number of turns half of which is 1.73 times more than the number of turns in the other half of the parts, with parts with a smaller number of turns occupying half the winding height, and parts with J5 a large number of turns - the other half of the winding of the joint venture.

The disadvantage of such a winding is that when it is used in transformers, it works in a 12-20 phase equivalent straightening circuit and is connected on three rods of the magnetic system of a part of the winding with a smaller number of turns in a star, and

with large - in triangle heads, they receive increased additional losses due to eddy currents, due to harmonic fields with numbers 6q ± 1 (, 3.5, ...), the currents of which in parts with different circuits {n. are in antiphase. The concentration of additional losses in the middle of the winding leads to a decrease in transformer reliability.

Closest to the proposed technical essence and the achieved result is the valve winding of the converter transformer split into an even number of parts, the number of turns of which half is 1.75 times more than the number of turns of the other half of the parts, each part consisting of connectors in parallel double disk coils, and coil parts with a number of turns alternate in height t23. Such a winding, when used in transformers operating in a 12-phase equivalent rectifying circuit, is achieved by connecting the winding parts with a smaller number of turns on three rods of the magnetic system into a star, and the parts with a large number of turns into a triangle have no distinct places. concentrations of additional losses, however, the total additional losses in it from eddy currents of harmonics with numbers 6q ± 1 (, 3,5,.,.) have a significant value. The purpose of the invention is to reduce the additional losses in the winding. The circuit is achieved by the fact that in the valve coil of a converter transformer consisting of two-way double disc coils split into an even number of parts | The number of turns of which is 1.75 times more than the number of turns in the other half of the parts, the first turn is made of parallel conductors with the number turns 4, the second turn is made of an even number of parallel conductors, with half of the parallel conductors with the number of turns 4f, and the other half of the parallel conductors with the number of turns 3, while the conductors with the number turns 4 of the second stroke of one coil are connected in series with conductors with the number of turns 3 n of the second turn of the other coil, and conductors with the number of turns 3 j of the second stroke of one kashutka are connected in series with the conductors with the number of turns of 4 liters of the second turn of the other coil, where n is the number of natural p yes from 1 to 7. In FIG. Figure 1 shows the connection diagram of a valve winding of a converter transformer consisting of four parts} in FIG. 2 two-way double disc coil, in FIG. 3 is a conductor connection diagram. Parts 1 and 2 have the number of turns equal to four, and parts 3 and 4 have the number of turns equal to seven. The winding is made up of two-way double disk coils 5-20, the paths of which are separated by channels to improve cooling in the axial direction. One of the two-way double disc coils, for example, 5, has two turns 21 and 22, and move 21 consists

from single coils 23 and 24, and move 9

In this case, each parallel branch consisting of two conductors has a number of turns equal to seven. Similarly coils 5 and 6 are connected and

Claims (1)

Re part 1, 2, 3 and 4. 34 22 - from single coils 25 n 26. Stroke 21 is made of a mixture of parallel conductors 27-33, and the number of turns wound by each of the conductors in each single coil 23 and 24 is equal to two, and the total number of turns of turn 21 is four. Between the conductors 27-33, a general transposition is performed during the transition from the single coil 23 to the single coil 24. The number of conductors in the radial size of single coils 23 and 24 is equal. The stroke 22 is made of eight parallel conductors 34-41, with two coils being made in single coil 25 with conductors 34-39, one coil with conductors 40 and 41, two coils in single coil 26 with conductors 36-41, and 34 35 - one turn. Thus, during the course of 22, conductors 36–39 completed four turns, and conductors 34, 35, 40, and 41 made three turns. When the wires go from single coil 25 to coil 26, a general transposition is performed. The number of conductors in the radial size of single coils 25 and 26 is 6.2 + 2x1 14. Thus, the radial dimensions of the single coils are equal when using the same size of the wire. Turn 21 can also be made from a different number of parallel conductors, however, in order to achieve equality of the radial dimensions of the coils, it is necessary to have two wire sizes. Two-way double disc coil 6 is made similar to coil 5 of two moves 42 and 43. Turn 42 is aapogic to move 21, and turn 43 is similar to move 22 and consists of single coils 44 and 45 wound by conductors 46-53. FIG. Figure 3 shows the connection scheme for the conductors included in the turns 22 and 32. The conductors 34-41 of the stroke 22 are connected in series with the conductors 49, 48, 47, 46, 53, 52, 51 and 50 of turn 43, respectively. With the rest of the coils. The connection of the obtained four and seven-section sections in parallel (Fig. |), Is obtained by reducing the additional losses due to eddy currents due to the fact that when working on the converter, harmonic currents with numbers 6q ± 1 (, 3.5, in parts 1 of the winding and 3 are in antiphase with respect to the currents of the same harmonics in parts 2 and 4. It follows that the additional losses from eddy currents created by the fields of the indicated harmonics are calculated similarly to the additional losses in the alternating winding, and the higher the degree interweaving parts with different patterns with If one goes to rectifier units of the combined construction, the significant equalizing current of the sixth harmonic between converters fed from parts of the valve winding with different connection circuits leads to an increase in current harmonics 6q ± 1 (, 3.5) in the valve winding. In this case, the additional losses can increase several times and become commensurate with the main ones. The application of the invention allows more than 4 times to reduce the additional losses from eddy currents in harmony with the numbers 6q + 1 (, 3,5 ,,,,) in tra formers, which work as part of a converter unit of the combined reactor design. In addition, the proposed valve winding has a high dynamic stability due to a more uniform current distribution along parallel branches in the short circuit mode of one of its parts. Claims The winding of a converter transformer consisting of two-way double disc coils is split into an even number of parts, the number of turns of which half is 1.75 times more than the number of turns of the other half of parts, characterized in that The first turn is made of parallel conductors with the number of turns 4, the second turn consists of an even number of parallel conductors, with half of them being alleles of conductors with 4 turns, and the other half of the parallel conductors in with the number of turns 3j, while the conductors with the number of turns 4 of the second turn of one coil are connected in series with the conductors with the number of turns 3 of the second turn of the other coil, and the conductors with the number of turns 3 of the second turn of one coil are connected in series with the conductors with the number of turns 4j, of the second turn of the other coil, where r is the natural number from yes to 7, Sources of information received in the examination at examination 1, Volodin VV, Pestr Eva L, M, Rogatskin M.A., 1Fishler Ya.L. Reduction of local additional losses in the ventilation windings of converter transformers of the TDNPV and TDNP series. Sat, Uralelectrat Zhmash, Sverdlovsk, Mid-Ural book publishing house, 1974, p., 11-15, 2, I, L Fisher, Urmanov R, N, Transformer transformers,, Energie, 1974, u t 11 11 p 12 15Iff 1fy / 5-4: f6- rf & tjr / 7-h ie- TO TO / /// BUT FIG. one g.1 taiii 36 37