SU1653065A1 - Voltage converter testing and protection device - Google Patents

Abstract

The invention relates to electrical engineering and can be used in power supply systems of communication equipment and automation. The purpose of the invention is to increase reliability and enhance functionality. The goal is achieved through the organization of monitoring the symmetry of the pulses of the control system of the direction converter, carried out with the help of the IS-NE element, the counter and the decoder, which have been added to the circuit. 3 silt

Description

The invention relates to electrical engineering and can be used, for example, in power supplies of automation devices.

The purpose of the invention is to increase reliability and enhance functionality.

Figure 1 presents the block diagram of the device; Fig. 2 is a diagram of a voltage converter control system; on fig.Z - timing charts

The device for controlling and protecting the voltage converter 1 controlled by the control system 2 contains a master oscillator 3. whose output is connected to the clock input of the counter 4, the P-input of which is connected through the AND-NOT element 5 to the outputs of the control system 2, the D inputs grounded, input + is connected to the forward output of the trigger 6, and outputs are connected to the inputs of the decoder 7 and together with the output of the decoder 7 to the inputs of the element OR 8, the output of which is connected to the D input of the trigger 9, C input of which is connected to the forward

trigger output 6, and the output - with the lock input of the control system 2, one of the outputs of which is connected to the C input of the trigger 6, the D input of which is connected to its inverse output. The installation inputs of the trigger 6 and 9 and the counter 4 is connected to the output of the unit 10 of the initial installation.

The control system 2 can be executed. For example, on a pulse-width modulator 11, the outputs of which are connected to the first inputs of the AND-HEY elements 12 and 13, the second inputs of which are combined and form the lock input of the control system 2, and their outputs are connected to inputs of inverters on the elements AND-HE 14 and 15, the outputs of which form the outputs of the system 2 control.

The device works as follows.

The signals from the output of the control system 2 control the converter 1 at the time of their coincidence (Fig. 3D). Block initial setup 10 when you install sets

with

WITH

0 SL CO

oh oh

SL

in state O, triggers 6 and 9 and resets all bits of counter 4 to O. Trigger 6 is built by a signal from the output of control system 2, the frequency at its output is 2 times lower than the gating, so one clock cycle of converter 1 is 4 works on addition (the signal G at its input is ±), and the other on subtraction. With a signal 1 at the output of the trigger 6 and O at the output of the element IS-NOT 5, the counter 4 performs the pulses of the master oscillator 3. When the output of the element IS-NE 5 has a signal 1, the counting is inhibited, when O arrives at the input ± of the counter 4, the invoice is reversed. At the outputs of counter 4, in the normal state of the control system, signals O should be present, and the signal O should also be present at the output of the element OR 8.

If the control times of the channels of converter 1 are different, then at the arrival of the pulse front from the output of trigger 6, the output of trigger 9 produces a signal 1 - Alarm (Fig. F), which can be used for blocking or indication. In addition, the state of the counter 4 is decrypted by the decoder 7. If the duration of the control pulse exceeds the specified one, then the output of the decoder 7 produces signal 1. which, via the OR 8 circuit, enters the D input of the trigger 9, which forms the Alarm signal. The program of work is presented in FIG.

Thus, due to the introduction of control for the symmetry of impulses

A voltage converter can be used to work on a transformer load with a simultaneous increase in reliability.

Claims (1)

Claims An apparatus for monitoring and protecting a voltage converter comprising a control system comprising a master oscillator, an OR element, and an initial installation unit whose output is connected to the setup inputs of two triggers, the direct output of one of which is connected to the C input of the other trigger The output of which is intended to be connected to a blocking input of the control system, characterized in that, in order to increase reliability and expand functionality, it is equipped with an estimator, decrypted rum and the element AND-NOT, the inputs of which are intended to be connected to the outputs of the control system, and the output is connected to the P input of the counter, the setup input of which is connected to the output f of the initial setup, the clock input to the output of the master oscillator, and the outputs and together with the output of the decoder - to the inputs of the element PI, the output of which is connected to the D-plug of another fiperch and the direct output of one trigger is connected to the input of ± counters, its D-input to its inverse output, and its C-gob to connect to one from the RODS control system