SU1339533A2 - A.c.voltage stabilizer - Google Patents

Abstract

This invention relates to secondary sources of radio power. The aim of the invention is to increase the reliability and ease of operation of the variable voltage stabilizer. When closing the switch 26 through the load 25 and the primary winding of the current transformer 18 current flows. The voltage from the secondary winding of the transformer I8 is rectified by bridge 19 and the capacitor 20 is charged. At a certain voltage value on the capacitor 20, the drive 21 is activated and current flows through the turner winding 22. As a result, the contacts 3,4,7,8 and 14-17 are closed, as a result of which the voltage from the network goes to the input of the stabilization unit, and from its output - to the load. PC. W (L With with 00 with SD 00 00

Description

The invention relates to electrical engineering, in particular to secondary sources of electrical power.

The purpose of the invention is to increase reliability and ease of use.

The drawing shows the scheme of the proposed stabilizer.

The AC voltage regulator contains input terminals 1 and 2, middle moving contacts 3 and 4 of the first and second groups of contacts of a two-position relay, disconnecting contacts 5 and 6, closing contacts 7 and 8 of the first and second groups of contacts of a two-position relay, node 9 stabilization, autotransformer 10, resistor 11, disconnecting contacts 12 and 13, closing 1e contacts 14 and 15 of the third and fourth groups of contacts of a two-position relay, middle moving contacts 16 and 17 of the third to fourth groups of contacts of the same relay, current transformer 18, relay bridge 19, capacitor 20, dynistor 21, winding 22 of a two-position relay, output terminals 23 and 24 of a voltage regulator, A load 25 and a switch 26 are connected to the stabilizer,

The stabilizer works as follows.

In the initial state, the terminals 1 and 2 are supplied with alternating voltage. Through the contacts 3, 5, 12, 16 and 4, 13, 17, as well as through the primary winding of the current transformer 18, this voltage is applied to the terminals 23 and 24. When the switch 26 is closed, the current flows through the load 25 and the primary winding of the current transformer 18 which, on the secondary winding of the current transformer 18, creates the voltage rectified by the bridge 19. At the same time, the capacitor 20 begins to charge. When the voltage on the latter reaches the value at which the distor 21 operates, an electrical voltage is applied to the winding 22 of the two-position relay . As a result of the on-off relay, contacts 3 and 7, 4 and 8, 14 and 16, 15 and 17 close, the voltage from the AC network is fed to the input of the stabilization unit, and from its output to the load 25.

When the on-off relay is turned on, the relay contacts close almost simultaneously, but a slight difference in the contact closure time is inevitable, which can be several hundredths of a second. In order to prevent the occurrence of 1 {and overvoltage in these fractions of a second, a resistor 11 is connected to its output contacts in the stabilization node. During the switching of contacts

a two-position relay for some time (about 0.05 s) de-energizes the line consisting of a current transformer and a load. A capacitor capacitor charge 20 holds the relay

in a closed state during this time interval.

Claims (1)

Claims of the invention AC voltage regulator containing input terminals, an autotransformer with a ferroresonant stabilization unit and output terminals, differing from the fact that, with a higher reliability circuit and convenience of operation, a two-position relay with four groups of contacts, a current transformer, a rectifying bridge, a capacitor, a dynistor and a resistor are introduced into it, the latter being connected to the output pins of the stabilization node, one output of the resistor through the contacts of the first group of contacts of the two-position relay are connected first weekend the terminal and the other terminal of the resistor through the closing contacts of the second group of contacts of the on-off relay and the primary winding of the current transformer connected in series to the second output terminal, the secondary winding of the current transformer is connected to the rectifier bridge input, the output of which is bypassed by a capacitor through a distor connected to the winding of the two-position u iHHoro relay, while the inputs of the ferro-resonant stabilization unit through the closing contacts of the third and fourth groups of contacts of the two-position the relays are connected to the corresponding input terminals; in addition, the first input and the first output terminals are connected via the opening contacts of the first and third groups of contacts two-position relay, and the second input and output terminals are connected through the disconnecting contacts of the fourth and second groups of contacts and the primary winding of the current transformer.