SU1288671A1 - Pulsed d.c.voltage stabilizer - Google Patents

Abstract

This invention relates to pulsed constant-voltage stabilizers. The aim of the invention is to increase the control range and reduce the level of interference in the supply network. The goal is achieved by the introduction of a two-winding choke 6 into the stabilizer. In this case, the charge of the capacitor 4 occurs simultaneously with a decrease in the magnetic flux of the throttle. This leads to the appearance of voltage on the second winding of the drossel, which through diode 7 enters the output of the stabilizer. Capacitor 4 is charged from O to the supply voltage level, and the switched winding 1 is applied to a voltage varying from the total supply voltage to O. The current passing through the switched winding, and hence the current consumed from the network, vary smoothly to reduce noise and increase the range of adjustment. 2 Il. c, (L 00 00 SP) OZIGL

Description

112

The invention relates to electrical engineering and can be used in power supply devices when powered from an alternating voltage network.

The aim of the invention is to expand the control range and reduce the level of interference.

FIG. 1 shows a diagram of the stabilizer when powered from a single-phase AC network; in fig. 2 - the same, when powered from a three-phase AC network

The device contains a transformer with primary 1 and secondary 2 windings, the primary windings 1 of which are connected via a switching bridge rectifier 3 to the terminals for connecting an alternating voltage source, to the outputs of the diagonal of the expander 3 a capacitor 4 and connected in series with a key element 1 is connected 5 and the primary winding of the throttles 6, the secondary winding of which through the diode 7 is connected to the output pins of the stabilizer, to which the secondary winding 2 of the transformer is connected through the output rectifier 8 and filter 9 The source 10 of the reference direction is connected to the first input of the comparison element 11, the second input of which is connected to the output terminals, and the output through the control unit 12 is connected to the control input of the key element 5.

The switching voltage regulator operates as follows.

As the output voltage of the stabilizer drops below the voltage of the reference source 10, the output of the comparison element 11 produces a error signal, which, after being converted in control unit 12, changes the relationship between the on and off times of the key 5.

When switching on the key 5 on the circuit: the primary winding 1 of the transformer,. the commutating diode bridge rectifier 3, the first winding of the throttle 6, the key 5 begins to flow current. Since the first winding of the choke 6 is connected in series with the primary winding 1, the current increase in the circuit goes smoothly. Simultaneously with the increase in current in the primary winding 1 along the circuit: + capacitor 4, switch 5, first winding of the choke 6, - condenser

capacitor 4 is discharged by capacitor 4.

The voltage applied to the primary winding 1 of the transformer is U | . and DC, where and, is the voltage across the primary winding 1; U is the instantaneous value of the supply voltage; U is the instantaneous value of the voltage of the condenser 4.

When the voltage on the capacitor 4 decreases, the voltage applied to the primary winding 1 increases, which leads to an increase in the voltage on the output winding 2 of the transformer and an increase in the voltage at the stabilizer output.

When the output voltage of the voltage regulator of the reference source is reached, the output signal of the reference element 11 decreases, causing the switch 5 to open. The discharge of the capacitor 4 stops, however, the current in the primary winding 1 continues to flow, as the capacitor 4 now begins to charge. The current in the swab 1 flows as long as the voltage on the capacitor is equal to the supply voltage. As the output voltage decreases, the cycle repeats.

Thus, the current flowing through the primary winding 1 varies smoothly without jumps.

Simultaneously with the beginning of the charge of the capacitor 4, the magnetic flux of the throttle 6 decreases.

A change in the magnetic flux of the droplet 6 causes a voltage to appear on the second winding of the droplet, which through the diode 7 enters the output of the stabilizer.

The use of the proposed stabilizer allows an increase in the output voltage control range, since when the switch 5 of the capacitor 4 is locked, it is charged to the supply voltage level, and the voltage applied to the primary winding 1 and, therefore, to the output winding 2 of the transformer is 0, when the switch 5 of the capacitor 4 is turned on, it is discharged to a voltage equal to 0, and the primary winding 1 is applied to the full voltage of the power supply, which corresponds to the maximum output voltage of the stabilizer.

The current passing through the primary winding 1, and hence the current.

consumed from the network, change smoothly, which helps reduce noise in the supply network, and the output voltage of the stabilizer can vary from 0 to the maximum value.

Claims (1)

Invention Formula the terminals of the source of the reference voltage, and the output through the control unit from the right output of the key element, the first output of the switched diode bridge rectifier connected to the first output, and the capacitor, in order to extend the control range and reduce the level interference, a double-throttle and a diode are introduced into it, the second output of the key element being connected through the primary winding of the chokes to the second output of the switched ten A DC voltage regulator containing a transformer, the primary winding of which is connected via a switched diode bridge rectifier to the terminals for connecting a variable f5 source of the diode bridge rectifier, to the voltage, and the secondary winding of the black terminals of which is connected to the cutout of the output terminal and the filter is also a capacitor, and the secondary outlets are secondary; the element of comparison windings through the diode is connected, the inputs are connected to the output with the output terminals. 886714 the terminals of the source of the reference voltage, and the output through the control unit from the right output of the key element, the first output connected to the first output of the switched diode bridge rectifier, and the capacitor, characterized in that, in order to extend the range of regulation and reduce the level of interference, A double-throttle choke and a diode are inserted into it, the second output of the key element being connected through the primary winding of the choke to the second output of the switched ten The f5 of the diode bridge rectifier, to the output terminals of which the capacitor is also connected, and the secondary throttle winding through the diode is connected to the output terminals. fa 2 Editor 0. Golovach Compiled by V. Mosin Tehred: N. Glushchenko Order 7807/46 Circulation 885 Subscription VNISh State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader A. Obruchar