SU194945A1 - WINDING TRANSFORMER-CAPACITOR - Google Patents

Description

Transformer windings are known that are made of foil strips separated by a thin insulating film. The film withstands voltages of the order of several hundred or even thousands of volts and provides significant capacitance between the plates. The voltage drop in the short-circuit resistance is compensated by a series (serial) capacitance formed by winding a second strip of foil into one of the windings that is not electrically connected to the first and connected to the second terminal of the transformer.

In the proposed transformer winding, in order to more fully use the foil and the Bitwise insulation of the winding as capacitor active materials to compensate for reactive power, the foil strips in each coil are interconnected in series. The number of strips of foil and the connection scheme of the coils are selected in accordance with a given capacity.

FIG. 1 shows the described winding, wound from two strips of foil connected in series; in fig. 2 is an electrical winding circuit; in fig. 3, 4 and 5 are given variants of the winding circuits (for the sake of clarity of the drawing, the containers are not shown).

the winding insulation film is equal to half the voltage on the winding, and the winding contains one parallel branch (foil strip).

FIG. Figure 1 shows two strips 1 and 2 of the foil (one of them is shown in dotted lines), and the isolate 3 is located between them. The number of turns of each strip is three, that is, there are only six turns in the winding. The electrical circuit of this winding (Fig. 2) shows those

the same lanes 7 and 2 and the tank 4 between them. The voltage on the capacitances at any point of the winding is equal to the voltage across the entire length of one strip, i.e., the voltage at half of the strip, its number of turns of the winding.

Consequently, the entire volume of the dielectric of the winding works evenly as an insulation for the capacitor. At the same time, the consumption of foil and insulation per winding did not change as compared with the known.

Depending on the size of a given capacitance, the number of foil strips and the winding circuit consisting of several separate parts may be different. Parts of the winding can be connected in series, in parallel or mixed.

The winding shown in FIG. 3 contains series-connected parts, wound alternately or simultaneously. Each part consists of two at the same time, for example, each part is placed - for example,. ,one

marriages of the entire core, and on the insulation layer

pry parts, i.e. - tension of the cable.

It is possible to make a winding from p parts, in this case the voltage on the insulating

the film will be equal to the voltage of the wedge.

The winding shown in FIG. 4, is wound from five strips of foil, successively interconnected. The end of the first band is connected with the beginning of the last, its end with the beginning of the second; the end of the second - with the beginning of the penultimate, its end - with the beginning of the third.

In this case, the voltage between the first n of the second, second and third, between the last but one and the last lanes will be - the voltage across the winding, and between the first and last and between the third and fourth pole

-. If the winding is made of m bands, then

on m - 2 insulation layers there will be a voltage

- tension of the core, and on TWO layers m

. If we take n successively connected parts, each of which is wound from m bands (m more than 2), then the greatest stress on the insulating film will be

voltage on the winding.

The winding shown in FIG. 5, is wound from four strips of foil. The first band is connected in series with the fourth, and the second with the third, the resulting branches are connected

2 in parallel. In this case, the voltage on

each layer of insulation is equal to - voltage

na winding. The same result would be if the band of the band is connected in series

with the second, and the third - with the fourth.

For example, lavsan, mylar, fluoroplast-4, and other siggytic materials can be used as insulating lamination. When using conventional condenser

paper transformer with similar windings will not be profitable.

Subject invention

20

A transformer-capacitor winding consisting of several coils wound from foil strips separated by a thin insulating film allowing a voltage of electrical strength greater than the coil voltage, in order to make fuller use of the foil and coil insulation windings as active materials of a capacitor for komtsensii reactive power, the foil strips in each coil are interconnected in series, and the number of foil strips and coil connection scheme are chosen in accordance with with a predetermined capacitance.

2

FIG. five

FIG.