SU1297023A1 - A.c.voltage stabilizer - Google Patents

Abstract

The invention relates to secondary power sources of radio equipment. The aim of the invention is. increasing the stability of the output voltage of the variable voltage regulator. The goal is achieved by making the magnetic system of an adjustable transformer of two groups W or U-shaped cores with a magnetic gasket 2 between them. Moreover, the core forms four branches, on one of which the primary winding 4 is located, on the other - the secondary winding 3, and on the other two - a bias winding, made in the form of two half windings 5 and 6, connected back-to-back. 3 il. (L C ND F About KJ ff wu

Description

11297023

The invention relates to electrical engineering, in particular, to alternating-voltage stabilizers, or on the basis of a transformer with a controllable magnet.

hell

flow and can be used 5 of the magnetic flux excited by

Van in the stabilized secondary power sources of electronic equipment.

The purpose of the invention is to increase the stability of the output voltage. ABOUT

Fig. 1 shows a functional diagram of the stabilizer and a variant of the design of a transformer with controlled magnetic flux; Fig. 2

the primary winding, between the branches on which the secondary winding and the half-winding 5 and 6 biasing are located. Using the law of total current for a magnetic circuit, it is easy to show that the magnitude of the magnetic flux in the branch with the secondary winding can be determined from the expression

z5j

and 3 - some variants of the form mag - -; :: - S-ic-iГ

nitty gasket assembly and the corresponding- ----. 1+.

n / h I pg. With; I 3

20

25

forms of their constituent elements.

In the stabilizer, the magnetic system of the transformer is assembled from two groups of W and (A / inverse cores 1 with magnetic strip 2 between them and forms four magnetic branches. On one of which is located the secondary winding 3, on the other - the primary 4, and on the other two - half-winding 5 and 6 bias, connected in series-opposite to the output of the signal conditioner, made in the form of an integrator 7, the input - which is connected to the output of the voltage comparison node 8, one input of which is connected to the output of the source 9 of the reference voltage, and two others - the secondary winding of the transformer 35 3 pa.

The stabilizer works as follows.

The output voltage of transformer-Q pa is compared in comparison node 8 with the reference voltage coming from source 9. reference voltage,. The result of the comparison of the output and reference voltages: from the comparison node 8 is fed to the input of the integrator 7, which provides an automatic output of the bias current to the working section.

The integrator output signal (current) is fed to the connected sequences of flax-counter winding bias.

Magnetic spacers 2 (Figures 2 and 3) are needed to reduce fluxes.

fU, -5, chg jU, -5, L,

| U, S, U

(1) where I, is the primary current;

W | - the number of turns of the primary winding;

 rd is the magnetic flux in the branch of the transformer magnet system on which the secondary winding is located

Ug is the magnetic permeability of the wind with the secondary winding;

S. is the cross-sectional area of the branch with the secondary winding;

Lj is the effective length of the branch with the secondary winding;

(W, - magnetic permeability;

branches with primary winding

7 - cross-sectional area, branches with primary winding;

L, is the effective length of the branch with the primary winding;

JU is the magnetic permeability of a single branch with a winding;

S J is the cross-sectional area of this branch; LJ is the effective length of this branch; .

II4 is the magnetic permeability of another branch with a secondary winding,

S is the cross-sectional area of this branch,

4 - the effective length of this branch.

For simplicity, | i. | Yg (ij, s, s 2s get more comfortable

dissipation of the primary and secondary polarization of the transformer, as well as for the analysis of the voltage, switching magnetic branches of the magnetic system, on which these windings are 0 I W - (2)

ki are located, the magnetic flux i 1 + 1,

controlling the permeability of branches with bias windings.

The control of the specified flow is carried out by redistribution

the primary winding, between the branches on which the secondary winding and the half-winding 5 and 6 biasing are located. Using the law of total current for a magnetic circuit, it is easy to show that the magnitude of the magnetic flux in the branch with the secondary winding can be determined from the expression

z5j

-j-

 ----. 1+.

n / h I pg. With; I 3

fU, -5, chg jU, -5, L,

| U, S, U

(1) where I, is the primary current;

W | - the number of turns of the primary winding;

 rd is the magnetic flux in the branch of the transformer magnetic system on which the secondary winding is located

Ug is the magnetic permeability of the branch with the secondary winding;

S. is the cross-sectional area of the branch with the secondary winding;

Lj is the effective length of the branch with the secondary winding;

(W, - magnetic permeability;

branches with primary winding;

7 - cross-sectional area, branches with primary winding;

L, is the effective length of the branch with the primary winding;

JU is the magnetic permeability of one branch with a bias winding;

S J is the cross-sectional area of this branch; LJ is the effective length of this branch; .

Ii4 - magnetic permeability of another branch with bias winding,

S is the cross-sectional area of this branch,

4 - the effective length of this branch.

For simplicity, | i. | Yg (ij, s, s 2s get more comfortable

g (4 G7 D analysis eflux 0 I W - (2)

Obviously, with the magnetization, U changes from u 1 to | 1 |,. In this case, the operating range of the change in the magnetic flux in the branch with the secondary winding L Pn is equal to

 0.57-IrW ,.

(

(3)

From expressions (1) and (2) it follows that if will change when jUi (, PJ changes and the input voltage changes, leading to a change in the current in the primary winding 1) This change in the flux magnetic flux leads to a change in the value of the emf in the secondary winding ..

From the discharge (3), it can be seen that any change in I,, fu, L within the working range of dF can be compensated by a corresponding change in magnetic permeability (U. This means that the JU control can stabilize the output voltage of the transformer with controlled magnetic flux, which is part of the voltage regulator.

Claims (1)

Formula izob. reteni An alternating voltage stabilizer containing a transformer with an adjustable magnetic flux, the primary winding of which is connected to the input terminals, and the secondary winding - to the output terminals and a control unit consisting of a reference node, one input of which is connected to the output terminals, and the other to the output of the reference voltage source, while the output of the comparison node through the driver of the control signal is connected to the pins of the bias winding, about and in order to improve the stability of the output voltage, The transformer system is made of two groups of W or and -shaped cores with a magnetic strip between them, performed so that four magnetic branches are formed, one of which has a primary winding, the other a secondary winding, and the other two have a winding: magnetic biasing ,, made in the form of two semi-windings, connected in series-counter, while the driver of the control signal is made in the form of an integrator. sri & .2 Editor M. Casard Order 780 / 51Tire already 864 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Rauschska nab. 4/5 Manufacturing and printing company, Uzhgorod, st. Project, 4 fi.Z Compiled by S. Chernysheva Tehred M. Khodanych Proofreader M. Demchik Subscription