SU792304A1 - G.t. creshchishin's -s.g. sevostianov's transformer - Google Patents

Description

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The invention relates to electrical engineering and can be used in high-power power and converter transformers in all areas of their application.

A pulsed transformer is known on an annular magnetic core, on which a high-voltage winding is wound by a multi-turn, and the low-voltage winding is made in the form of a single-turn metal cylindrical container that encloses a high-voltage

winding 1.

The disadvantages of the mentioned pulse transformer include the fact that the design of the cylindrical container is not metallic and does not provide effective high-voltage electrical insulation and the nominal voltage of the low-voltage winding is low.

A high voltage transformer is known, which contains a primary winding of metal rods closed up by dielectric discs in an insulating cylinder, and a secondary winding of toroidal coils located in insulating cells on an insulating cylinder 12 -30

The known invention is the closest to the described technical essence and the achieved effect.

The disadvantages of the aforementioned high voltage transformer include the fact that a sealed tank is required to fill the transformer with an insulating dielectric.

The aim of the invention is to simplify the design, improve performance, increase U1D and power density.

The goal is achieved by the fact that metal rods are made in the form of cylindrical sectors with insulating dielectric spacers isolated from each other and folded in the form of a cylinder, the tank is made of separate longitudinal metal strips which are separated from each other by a dielectric and connected in series with the said metal rods moreover, the mentioned barrel can be made cylindrical.

FIG. 1 shows an electric circuit diagram of a transformer; Fig.2 rt transformer, general view with a cut;

in fig. 3 - transformer, cross section.

The transformer contains a low-voltage winding 1 consisting of a metal barrel 2 assembled from isolated Hfcjx insulated longitudinal metal strips 3 separated from each other by dielectric pads 4 and connected in series with metal rods 5 that are made in the form of cylinder sectors, insulated from each other by dielectric 6 and folded in the form of a cylinder, a high-voltage winding 7 of several toroidal coils 8 placed in insulating cells 9 on an insulating centering cylinder 10 , - supplied with through holes perpendicular to its axis, and flat rings 11 of the insulating cells 9 are provided with insulated rims 12, which are pressed against the inner surface of the metal barrel 2. The metal barrel 2 is mounted on the insulating stand 13. The high-voltage winding 7 is equipped with a cable an input 14 of a high voltage passing inside the isolator 15 and a connection 16 to a neutral three-phase network. The extreme longitudinal metal strip 3 is provided with a connecting contact 17, and the extreme metal rod 5 is equipped with a connecting contact 18. The electrical connections between the toroidal coils 8 are made with a high-voltage cable 19. The metal barrel 2 is filled with an insulating dielectric. Limit metal strips 3 and metal rods 5 can be connected in series to produce one low voltage winding or form several parallel low voltage windings.

The transformer works as follows.

A high primary voltage is supplied to the high voltage winding 7 through the cable inlet 14. The primary current flows in the winding of the toroidal coils 8 and induces a secondary voltage in the longitudinal metal strips 3 and metal rods x 5 of the low-voltage winding 1. The secondary power from the low-voltage winding 1 is transmitted to the network load 1 and through the connecting contacts 17 and 18. Dielectric pads 4 and 6 conduct inter-turn electrical insulation of the low voltage winding 1. Insulation stand 13 isolates the low-voltage winding 1 from short circuits

to the ground. The isolation cells 9 isolate the toroidal coils 8 from each other. The centering cylinder 10 fixes the position of the toroidal coils 8 relative to the low-voltage winding 1 and at the same time performs the role of solid insulation, and the through holes in the insulating cylinder 10 promote the circulation of the insulating dielectric, the cooling winding of the transformer. The voltage of the high voltage winding 7 constitutes a nominal value in its middle part and decreases in the direction of its edges. This ensures a uniform distribution of the high voltage gradient over the longitudinal insulation of the high voltage winding 7. Insulating flat rings 11 and insulated rims 12 take on the weight and dynamic load from the toroidal coils 8 and simultaneously act as stiffeners inside the metal barrel 2, and the full The weight load from the transformer is assumed by the insulation stand 13.

Claims (3)

1.Transformer containing high-voltage winding from toroidal coils and low-voltage winding from insulated-metal rods passing through toroidal coil windows, electric current inputs and outputs, and a tank filled with insulating dielectric, characterized in that, in order to simplify the design and improve performance, said metal rods are made in the form of sectors and arranged in the form of a cylinder, the tank is made of separate longitudinal metal strips which are connected in series with said metal rods and bonded to each other by a dielectric. 2. A transformer according to claim 1, characterized in that the tank is in the form of a barrel. 3. A transformer according to claim 1, characterized in that the tank has a cylindrical shape. Sources of information taken into account in the examination 1. USSR author's certificate number 177523, cl. H 01 F 19/08, 1964. 2. Authors certificate of the USSR 608204, cl. H 01 F 31/00, 1974. / 8h / 17 NO o- 17 9; ii H; 8 9.