SU987601A1 - Ac voltage regulating device - Google Patents

Description

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The invention relates to electric engineering, in particular to converter technology, and can be used, for example, in electrical devices with electric induction devices controlled by direct-current magnetisation.

Devices for regulating alternating voltage are known using saturation chokes connected in series with the primary winding. power transformer fl 1.

The common drawbacks of such devices are low, efficiency, distortion of the current and voltage waveform, high specific intensity. consumption, active materials.

Closest to the present invention is a device for regulating an alternating voltage containing a main transformer, the primary area of which is connected to the input terminals, and two magnetisable booster transformers, the secondary winding of one of which is connected in series with the secondary winding of the main transformer, and The primary HBie & trays are connected in series with each other and connected to the input terminals of G 2.

The disadvantages of this known device are the high specific consumption of active materials and the low efficiency when the voltage is applied in the secondary circuit of the main transformer, a part of the energy is taken from the secondary o & Pick it up and transfer it through one of the add-on transformers back into the network.

The purpose of the invention is to reduce the specific consumption of active materials and increase efficiency.

The goal is achieved by the fact that in a device for regulating an alternating voltage containing a main transformer, the primary winding of which is connected to the input terminals, and two magnetisable electrical booster transformers, the secondary winding of one of which is connected in a sequence-wise manner with the secondary winding of the main transformer, and their primary windings are connected in series with each other and connected to the input pins, the secondary winding of the other booster transformer is connected according to deno-sequentially from the primary about & 1 current of the main transformer.

FIG. 1 is given a functional diagram of the device; in fig. 2 shows a functional diagram of the device in which the down-converter is used as a booster transformer.

Adjustment device; AC voltage (Fig. 1) contains the main transformer 1 with the primary 2 and secondary 3 windings, respectively, input 4.5 and output 6.7 outputs, respectively, booster transformers 8 and 9, the primary windings Yu and 11 are connected in series between themselves and connected to the input terminals 4 and 5, in their secondary windings 12 and 13 are connected in a consistency-series-sequence with the primary 2 and secondary 3 windings of the main transformer 1, respectively. In this case, booster transformers 8 and 9 have corresponding biasing trays 14 and 14 amps.

The device works as follows. :

Let the supply voltage at inputs 4 and 5 be minimal. In this case, the booster transformer 8 is fully energized, while the output voltage at the terminals 6 7 is equal to the sum of the voltages of the secondary and trays 3 of the main transformer 1 and the secondary winding 13 of the booster transformer 9, i.e. equal to the nominal value.

; The positive additive of the secondary side 13 voltage in this case compensates for the decrease in the voltage on the secondary 3 main transformer 1 while reducing the supply voltage to the minimum value.

Now suppose the supply voltage at the input terminals 4 and. 5 is equal to its maximum value. Then, the booster transformer 9 is fully magnetized, and the output voltage at terminals 6 and 7 is equal to the voltage of the secondary winding 3 of the main transformer 1.

Increasing the supply voltage in this case is compensated by redistributing it between the primary winding 2 of the main transformer 1 and the secondary winding 12 of an additional transformer 8.

In this case, the voltage on the primary winding 2 of the main transformer 1 is equal to its nominal value and less than the supply voltage by the amount of voltage drop on the secondary winding 12 of booster transformer 8.

At intermediate values of the supply voltage, the biasing of both booster transformers 8 and 9 takes place by varying the current of the bias current 14.

In particular, with an increase in the supply voltage, the bias of the booster transformer 8 decreases, and the bias of the booster transformer 9 increases, and with a decrease in the supply voltage, vice versa.

The principle of operation of the device remains the same if a step-down autotransformer is used as a booster transformer 8 (Fig. 2). I

Thus, unlike the prototype, the main transformer 1 of the proposed device is calculated for the nominal supply voltage, and also does not transfer additional excess energy back to the supply network, which makes it possible to reduce it. specific consumption of active materials and increase the efficiency of the device.

orm ula invention

An alternating voltage control device containing a main transformer, the primary winding of which is connected to the input views and two magnetisable booster transformers, the secondary winding of one of which is connected in series with the secondary winding of the main transformer, and their primary windings are connected in series with each other and connected to input pins, characterized by

that, in order to reduce the specific consumption of active material and increase efficiency, the secondary winding of another booster transformer is connected in series with the primary winding of the main transformer. Sources of information taken into account during the examination 1. Bamdas A. M-, Shapiro S. V. Transformers regulated by magnetized 9676 5,016. M., Energia 1965, p. 1O-11, rice, 1-1 a. 2. V. Somov. Regulator voltage with voltage boosting magnetizable transformers. - Electricity, 1960, No. 9, p. 34-35, rice, 1.

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Claims (1)

Claim A device for controlling AC voltage, comprising a main transformer, the primary winding of which is connected to the input terminals and two magnetizable boost transformers, the secondary winding of one of which is connected in series with the secondary winding of the main transformer, and their primary windings are connected in series with each other and connected to the input conclusions, characterized in that, in order to reduce the specific costs of active materials and increase efficiency, the secondary winding of another the additional transformer is connected in series with the primary winding of the main transformer.