SU1179444A1 - Method of controlling voltage of loaded electrical induction device - Google Patents

Abstract

METHOD FOR CONTROL VOLTAGE LOADED electromotive device by winding turns of a winding, wherein Qc in that, in order to reduce energy loss 3 device by eliminating the voltage drop on irregularly wound coils, at smatyvaniivitkov with winding conductors and the insulation is wound separately and is wound on the winding together. M

Description

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The invention relates to electrical engineering, in particular, to methods for regulating the voltage of a loaded electrical induction device p; (transformer, reactor, inductors) ..

The improvement of the methods for regulating the voltage of a loaded electrical induction device is relevant, since the provision of the Nominal voltage on the electrical receivers is the main condition for high efficiency, long service life and reliability of their work.

There is a known method for regulating the voltage of a loaded transformer by switching on a current in the circuit and turning off the coils placed in the winding composition Ci.

The disadvantage of this method is the presence of idle coils in the winding composition, which causes overvoltages and energy losses due to eddy currents; with increasing control limits, the indicated overvoltages and energy losses increase.

There is a known method for controlling the voltage of a single-phase load. transformer by rewinding coils from one part of the winding to another serial part of the winding with the opposite direction of the voltage in the latter 2.

The disadvantage of this method is the presence of energy losses 1I in the transformer due to the fact that current flows in the wound coils and there is a voltage drop across them.

The object of the invention is to find such operations for winding turns from a winding so that the voltage drop on the wound turns is absent. At the same time, losses in them and overvoltages are also absent.

The purpose of the invention is to reduce the energy sweating in the device by eliminating the voltage drop on the wound coils.

The goal is achieved in that according to the method of regulating the voltage of a loaded electrical induction device by rewinding the windings, when winding the windings from the winding, the conductors and insulation are wound separately and put on the winding together.

FIG. 1 shows a method for adjusting a transformer phase; in fig. 2 shows a method for controlling the phase of a reactor without a magnetic core; in fig. 3. - method of adjusting the phase of the reactor with a fixed winding; Fig. 4 illustrates a method for controlling a three-phase transformer with a spaced magnetic core.

The proposed method of regulation. This is because when winding the coils from the winding, they are out of the magnetic system so that they do not cover the main work flow, the conductor and the insulation are separated and wound separately, while the conductors are closed electrically and the coiled coils disappear. ; wind the turns on the winding by jointly winding the conductors and the insulation, forming insulated turns in the winding composition, covering the working magnetic flux.

Fig. 1 shows the voltage of a transformer containing a magnetic core 1, a non-adjustable winding 2 and an adjustable winding 3 consisting of turns formed by conductors 4, insulation 5, a sliding contact 6 on a wire of the outermost coil, placed on a supporting cylinder 7 s. the supports 8 and the inter-winding insulation 10 are regulated by winding the conductor onto a roll 11 with a metal half 1 and an insulating support half 13, while the layers 14 of the bare conductor are electrically closed, the winding is performed by rotating 15; herewith, the conductor part 16 connects the winding 3 with the roll 11; similarly, winding the insulation onto the coil 17 by rotating the shaft 18, on which the insulation layers 19 are placed in the presence of the connecting insulation section 20 between the winding 3 and the coil 17, close the current circuit by means of a current collector 21 on the shaft 12.

The mutual arrangement of the winding 3 and the rolls is shown in FIG. 2, Winding 3 is made of high-strength foil.

FIG. Figure 2 shows an example of the application of the method in a reactor, the regulation of which is carried out by rewinding the windings from winding 3 to roll 11 (conductors) and roll 17 (insulation); the absence of a magnetic circuit allows current collection

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21 from the shaft 12 installed in the winding cavity.

o According to the example of application. in the case of a stationary winding 3, the coil is rewound by turning the coils 11 (with conductors) and 17 (with insulation) around their shafts, as well as around

on {4trac 3 with the preservation of the contact on the coil b, the integrity of the current circuit is maintained by the known slippery contact of the X with controlled thyristors; when winding the coils, the rotation around the winding is performed according to the tea needle, while winding -.

;counterclock-wise. According to the control method in a three-phase transformer with spatial placement of the windings 3.

Phases I А В, С (Fig. 3) rewind a vitcbv at the same time from all three windings on one coil - roll

i (11 ,, 17)} current collection in neutral passage 94444

water from the sliding contact 22, in the normal working mode, the sum of the currents 1e, i, i is equal to zero and the voltage drop on the wound coils 5 is practically absent; in case of a short circuit in one of the phases, the symmetry of the currents is broken, which leads to a sharp increase in the inductive resistance of the wound turns and limits. . no short-circuit current in the windings.

In the proposed method, the following has been achieved: the physical effect of the disappearance of a fall, the stress on the wound coils. In the first variant, this effect is achieved by galvanic connection of wound conductors, and in the second variant, by the disappearance of the magnetic field of the wound and coils of all phases combined into one coil.

The economic effect is due to the physical effect and amounts to more than 1 million rubles.

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Claims (1)

METHOD FOR REGULATING THE LOAD VOLTAGE OF A LOADED ELECTRIC INDUCTION DEVICE by rewinding winding coils, characterized in that, in order to reduce energy losses in the device by eliminating voltage drop on coiled windings, when winding coils from winding, the conductors and insulation are wound separately and wound onto windings. Figure 1>