SU1552370A2 - Electronic relay - Google Patents

Abstract

The invention relates to switching technology and can be used for contactless switching of electroautomatic devices. The purpose of the invention is to expand the functionality. For this, a frequency switching element 13, a frequency detector 16, a second threshold element 17, a second output switch 18, a fourth rectifier 15, and a pulse transformer 3 are provided with a third secondary winding 14 are inserted into the device. The device also contains a pulse generator 1, a pulse transformer 3 s primary 2 and secondary 5 and 10 windings, first 4 and second 8 and third 9 rectifiers, first threshold element 6, first output switch 7, control switch 12, resistor 11 and second threshold element 17. The goal is achieved by nor independent switching of two sources by signals transmitted through one transformer. 2 Il.

Description

The invention relates to switching technology, can be used for contactless switching of electroautomatic devices and is an improvement of the invention according to the author. St. KY50103.

The purpose of the invention is to expand the functionality by implementing the independent switching of two sources by signals transmitted through one transformer.

FIG. 1 shows a diagram of an electronic relay; in fig. 2 - diagrams for the operation of this device.

The electronic relay contains a generator of 1 pulses, the outputs of which are connected to the terminals of the primary winding 2 of a pulse transformer 3, the first rectifier 4, whose inputs are connected to the terminals of the first secondary winding 5, and the output connected to the first input of the first threshold element 6, the output of which is connected to the first output switch 7, which is connected between the buses of the first switched source, one of the outputs of the switch 7 is connected to the common bus, to which the second output of the threshold element 6 is connected, and the second output 8, the inputs of which are connected to the terminals of the first secondary winding 5 of the transformer 3, and the output to the power supply bus of the threshold element 6, the third rectifier 9, whose inputs are connected to the second secondary winding 10 of the transformer 3, and the first output through the resistor 11 to the first the output of the control key 12, the second output of the third rectifier 9 is connected to the second output of the control key 12, the input of which is connected to the first control bus, the frequency switching element 13, the input of which is connected to the second control bus, and the output to the control entrance the pulse generator 1, the third secondary winding of the pulse transformer 3, the conclusions of which are connected to the inputs of the fourth rectifier 15 and the inputs of the frequency detector 16, the second threshold element 17, whose input is connected to the output of the frequency detector 16, and the output to the control input the second output key 18,

which is connected between the buses of the second switched source, one of the pins of the key 18 is connected to the common bus to which the first one is connected

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the fourth rectifier 15 and the second output of the second threshold element 17, the combined power bus of the second threshold element 17 and the frequency detector 16 are connected to the second output of the fourth rectifier 15.

Electronic relay operates as follows.

In the initial state, in the absence of control signals on control buses Uunp.i and Uunp 2, generator 1 forms on the primary winding 2 and respectively on the secondary windings 10, 5 and 1k of pulse transformer 3 a sequence of unipolar pulses of frequency f1 8 are used to power the first threshold element 6 and, accordingly, the rectifier 15 to power the second threshold element 17 and the frequency detector 16.

At the same time, a sequence of unipolar pulses of frequency f, from the winding 14, is fed to the input of the frequency detector 16, forming at its output a voltage insufficient to convert the second threshold element 17 to an on state. The voltage at the output of the second threshold element 17 is at a low level, which ensures the locked state of the output switch 18.

At the end of each pulse, a reverse surge occurs on the windings of transformer 3, caused by a decrease in the magnetizing current of the primary winding 2. The emission amplitude is proportional to the resistance shunting the winding 10 of transformer 3, and has a maximum value when the key 12 is open and the minimum when closed. The backflushing occurring on the winding 5 is rectified by the first rectifier and fed to the input of the first threshold element 6, forming at its output a low voltage level that ensures the locked state of the output switch 7,

In the presence of a control voltage U, and the absence of Uunp.i

The frequency switching element 13 changes the frequency of the generator 1, which forms on the secondary windings of the transformer 3 a sequence of unipolar pulses of frequency f2, and f2 - c f4, which, arriving at the input of the frequency detector 16, forms at its output a voltage sufficient for transfer of the second threshold element 17 to the included state. In this case, the voltage at the output of the second threshold element 17 increases abruptly, which causes the output key 18 to quickly turn on. In this case, the state of the first threshold element 6 and, accordingly, the state of the output key 7 do not change, since the backward emission amplitude is maximum and the voltage at the input of the threshold element 6 does not exceed in absolute value the threshold of its operation. At the end of the control signal Uunpi, the output key 18 is reset.

If there is a control voltage U unp and no Uunp-2. the control key 12 opens, shunt the small resistance of the resistor 11 to the winding 10 of the transformer 3. As a result, the amplitude of the reverse surge and the voltage level at the input of the first threshold element 6 decreases, the first threshold element 6 triggers, the voltage at its output abruptly increases, which causes fast turning on the output key 7. At the same time, the output key 18 is in the closed state, since a change in the amplitude of the backward emission does not affect the performance, does not change the voltage at the output frequency detector 16 and does not change the state of the second threshold element 17. At the end of the control signal Uunp.i, the output key 7 returns to the initial state.

When the control signals Uunp.t and Uunp.i are simultaneously applied, the frequency of the generator 1 changes,

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which causes the inclusion of the second output switch 18 and the shunting of the amplitude of the voltage pulses of the polarity polarity, which causes the activation of the first output switch.1 7. At the end of the control signals Ihjnp i and I utip.i, the output keys 7 and 18 return to their initial state the

10 Thus, the introduction of a second independent channel into an electronic relay allows independently through one transformer to transmit two relay signals and, accordingly,

15 switch two sources, which allows to expand the functionality of the proposed device.

Claims (1)

Invention Formula Electronic relay auth. St. No. 1 50103, characterized in that, in order to expand the functionality, a frequency switching element is introduced, the input of which is connected to the second control bus, and the output is connected to the control input of the pulse generator, the pulse transformer is provided with a third secondary winding, the outputs of which are connected to the inputs the fourth rectifier and the frequency detector inputs, the second threshold element, the input of which is connected to the output of the frequency detector, and the output to the control input of the second output key, which is connected between the buses in orogo dial source, one of the terminals of the second output switch connected to the common bus to which is connected a first output of the fourth rectifier and the second output of the second threshold element, the combined power bus member and the second threshold frequency detector connected to the second output of the fourth rectifier. U {  St / m and,  toff and,  MDL U & g / n $ silt / yuga2 Gympho Ilfo 1 idylf2  - - i-i  - | - vt  breathing mr.1 Figg