SU50257A1 - Electric transformer - Google Patents

Description

The present invention relates to an electrical transformer device, in the primary and secondary systems of which several windings are applied, located in each phase equally with respect to magnetic flux and intended for approximately the same magnitude of the magnetizing current load and i-change; oM coefficient of transformation.

In order to obtain an approximate proportionality between} - the magnitude of the transformer flow and its load, the windings indicated are in the primary and secondary systems of the main winding, calculated for the normal power of the transformer and one or more auxiliary windings. The latter are rated for lower power and are connected in each phase in accordance with the load in the required quantity in series with the main winding. This type of connection makes it possible to obtain about one or several transformer power levels, which can be selected arbitrarily, which powers are the nominal progressively lower powers below the maximum nominal or normal power of the transformer.

In FIG. 1 depicts the schematic diagrams of connecting the main and auxiliary windings of the primary and secondary systems of the proposed transformer; FIG. 2 shows the arrangement of individual transformer windings in a plane perpendicular to the core axis.

In each position (/, 2, 5, and 4) of the principle scheme. We, according to FIG. 1, a thin line depicts sets of high voltage windings of a transformer, and thick lines refer to low voltage windings. In a separate position in each phase, the main winding is shown on the left, and the three auxiliary windings are arranged successively one after the other to the right. These windings are designed to produce three different steps .MOHIHOCTH

transformer as well as normal power 4 and included according to positions 1, 2 and 3 and 4.

FIG. 2 schematically shows an exemplary constructive arrangement of the windings of the proposed transformer. The high voltage winding consists of the main winding ui and three separate auxiliary windings & 1, all four windings running independently along the entire length of the package of the transformer core. The low voltage winding consists of the main winding a and three separate auxiliary windings by, all four windings being pezavpimo but the entire length of the same heart package. An insulating pipe with separates the high voltage windings of a transformer from its low voltage windings, d-and:; olation layers between the main winding and the auxiliary windings for the primary and secondary systems.

For simultaneous operation, each transformer winding system is connected with a controller. The latter turns on or off in each phase, in accordance with the required level of the monstrous, in series with the main winding of one or more auxiliary windings. In the case of a three-phase transformer, these controllers also switch the star windings to a triangle.

The proposed serial connections of the main and auxiliary windings to create optimal transformer operating conditions for all types of loads are applicable.

both single-phase and multi-phase step-up and step-down transformers.

The subject matter of the invention.

1. An electric transformer, in the primary and secondary systems of which several windings are used, located in each phase of the OLT, are so relative to the magnetic flux and intended, at their connections, to cause, for example, an unchanged percentage value of the magnetizing current under the applied load and peizemein. , characterized in that, in order to obtain an approximate proportionality

 between the magnitudes of the transformer flow and its load, the indicated: windings consist in the primary and secondary systems of the main winding, designed for the normal power of the transformer, and one or

: several auxiliary windings,

I designed for lower power

i and attached in each phase in

according to the load required

quantity consistently with the main

 in order to get one or

There are several transformer power levels that can be chosen arbitrarily, which powers are the nominal progressive lowering powers below the maximum nominal and; 1 and the normal power of the transformer.

2. Application in case of transformer I but item 1 of the controller for connecting PIA of one or another number of auxiliary windings in series with the main ones.

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