SU1173500A1 - Apparatus for monitoring the pulses of controlled master generator of static converter - Google Patents

Abstract

DEVICE E) 1I OF CONTROL OF PULSES OF CONTROLLED SIGNATURE GENERATOR STATIC TRANSMITTER, Compressor, RC, Chain, Controlled Key, Controlled Specification Generator; the power supply and the other with a common bus, an RC circuit is connected between the power source and the total thickness, and its midpoint is connected to the second input of the comparator, parallel to the RC capacitor, the key is switched on, The main input of which is connected to the output of the controlled master oscillator, characterized in that in order to expand the frequency control range of the master oscillator, the comparator is equipped with a third additional (L input connected to the control input of the master oscillator of the static converter. .

Description

The invention relates to electrical engineering, in particular, to converter technology, and may find application in control systems and diagnostics of static converters in power supply systems. The purpose of the invention is to expand the range of control of the frequency of the master oscillator by detecting the loss of a pulse at its output. . FIG. 1 shows a diagram of the device; in fig. 2 and 3 - time diagrams of work. The device contains a comparator 1, the first input (non-inverted) of which is connected to the output of a voltage divider made on resistances 2 and 3 and connected in series between the power supply and the common bus, RC is a chain consisting of series-connected resistance 4 and a capacitor 5, connected between the power source and the common pin, and the common point with the second inverse of the comparator 1, parallel to the capacitor 5 is the control key b, the control input of which is connected to the output of the controlled (controlled) s authorizing generator 7, a control having an input coupled to the third (inverted) input of the comparator 1 whose output is the output of the device .... The device works as follows. During normal operation of the controlled master oscillator, the capacitor 5 is charged to a voltage level not exceeding the voltage level of the divider at point B (Fig. 1), after 11 each next pulse at the output of the key 6 opens it (brings it to a conducting state) and the capacitor 5 is discharged almost to zero each time, and at the output of the comparator 1 the level of the positive saturation of the operational amplifier is maintained. In the case when there is no regular pulse at the output of the generator 7, the key 6 does not close and the capacitor 5 continues to charge and when the voltage on it reaches a level higher than the voltage of the divider (Fig. 2 and 3), the comparator switches to its the output is set to a negative saturation level, which is used as a signal to activate the actuator, for example, to turn on the backup generator instead of the failed indicator. In this case, if the generator frequency changes, then the comparator tripping moment changes accordingly, since its third (inverse) input receives the control voltage from the generator input. Thus, an increase in the control voltage is equivalent to the acceleration of the capacitor charge due to the summation at the (inverse) input of the voltage comparator of the capacitor with the control voltage. The time constant of the RG circuit is determined by taking into account the minimum delay time of the formation of a signal about the loss of a pulse at zero control of the control voltage (Fig. 2). At the nominal control voltage, the formation of a signal about the loss of a pulse occurs, respectively, with a smaller delay (Fig. 3).

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Claims (1)

DEVICE E) 1st CONTROL OF PULSES OF THE CONTROLLED STATUS CONVERTER GENERATOR, containing a comparator, voltage divider, RC - chain, controlled key, its middle point connected to the second input of the comparator, parallel to the RC capacitor - connected to the input control oscillator, cast in that for the purpose of controlling the range of the master oscillator, the complement is controlled by the frequency of expansion, the parator is equipped with a third input connected by the barking input of the master SU, 1173500 1173500.