SU301111A1 - Ferroresonant voltage stabilizer - Google Patents

Description

(54) ferroresonant voltage regulator

Ferroresonant voltage stabilizers are known, for example, to power televisions. They contain a linear line choke with compensating feedback windings, the network winding of which is connected to the beginning of the sectioned primary winding of the autotransformer. In this case, a capacitor is connected to the secondary winding of the autotransformer in series with the resonant winding of the linear filter throttle, which is also equipped with compensating windings. It forms a parallel ferroresonant circuit tuned to the network frequency with the autotransformer windings, and a serial resonant circuit tuned to the third harmonic of the network frequency with windings of the filter throttle.

Such stabilizers have a large weight, size, require a significant amount of non-ferrous metals, and the sinusoidal shape of the output voltage curve is often distorted. This happens mainly because the compensating windings of both the mains and the filtering linear chokes, despite the fact that they contain a significant number of turns of the winding wire necessary to create the voltage values of the compensation of the primary and third harmonics, are not enough in the secondary circuit of the autotransformer effectively corrects the shape of the curve and improves the stability of the output voltage. Through these windings, a stabilizer load current flows, which, as a rule, changes little during its operation. The overrun of non-ferrous metals (copper or aluminum) in such stabilizers is very significant.

A distinctive feature of the proposed stabilizer is that one of the compensating feedback windings, located on the network and filtering throttles, is connected in series with the sections of the primary winding of the autotransformer. This allows for a reduction in weight,

dimensions, saving non-ferrous metals, as well as improving the stabilization and shape of the output voltage curve.

FIG. 1 given the scheme described stabilizer; in fig. 2 - the voltage regulator circuit called Selene; in fig. 3 shows a possible embodiment of a stabilizer circuit in which distinctive features are combined as the circuits in FIG. 1 so

and other known voltage regulators.

stabilizer load Rs and resonant circuit capacitor C.

The operation of the new stabilizer is distinguished, first of all, by the fact that one of the compensating windings, located on the linear network and filtering throttles, is connected to the break and consistently with the primary winding of the autotransformer - the windings Wl and AWs.

The inclusion of compensating feedback windings in the first winding of the autotransformer allows reducing the number of turns of these windings n times, where n is the transformation ratio of the autotransformer, so as to achieve the voltage value in the first, Af /, Af / 3

parallel winding equal to and,, popp

turns required n times less.

 dg - AW; ---, and n / z -

where Wi and Ws are the number of turns of the compensating windings connected in series with the secondary winding of the autotransformer in the known stabilizers.

Such a reduction in the number of turns of the compensating windings reduces the size of the stabilizer chokes, saving the nonferrous metal (copper or aluminum) and electrical steel. In addition, the number of turns of compensating windings, as well as WIAT and autotransformer windings can be reduced based on the following physical processes occurring in the stabilizer, which are caused by the inclusion of compensating windings in the primary winding of the autotransformer.

The current of the first winding AT, passing through the compensating windings of the main and filter chokes, varies according to the law of the magnetization curve, and its increase is proportional to the reciprocal of the differential permeability coefficient of the magnetic material of the autotransformer:

d

d /

one

an

Ef

This current creates an additional compensation voltage drop. Consequently, the number of turns of the compensating windings can be reduced again so that the values of Af / i and At / 3 retain their value.

The number of turns of compensating windings

should be reduced by T / - times, so

r | j.a

as inductive resistance of windings

AWi is proportional to the inductance of these windings, and the number of turns is proportional to the square root of the inductance.

Claims (1)

Invention Formula A ferroresonant voltage stabilizer, for example, for powering television sets, contains a linear line choke with feedback compensating windings, the network winding of which is connected to the beginning of a sectioned primary winding of an autotransformer, the secondary winding of which is in series with the resonant winding of a linear filter choke having also compensating windings, a capacitor is connected that forms a parallel ferroresonant circuit tuned to the mains frequency with the windings of the autotransformer, and a sequential resonant circuit tuned to the third harmonic of the mains frequency, which in order to improve stabilization and shape of the output voltage reducing the weight, size, economy of non-ferrous metals, at least one of the compensating feedback windings of the network and filter chokes is included It is designed with sections of the primary winding of the autotransformer.