SU1714800A1 - Commutator - Google Patents

Abstract

The invention relates to a pulse technique and can be used in switching devices. The purpose of the invention is to increase reliability and speed. The switch contains in each channel an electromagnetic relay 4. diodes 5, 6 and a resistor 10 common to all channels. Control bus 1, bus 8, tripping, bus 7, supply bus 11. Introduction of Zener diode 9. which is connected between bus 7 and the connection point of the resistor 10 with the bus 8. and the introduction of a thyristor 2 into each channel. The cathode of which is connected to the bus 1. The control electrode with the cathode of the diode 5. and the anode is connected to the bus 11 via the winding of the relay 4 and to the bus 8 through the diode 6. allows reducing the number of mechanical contacts and radio elements. 1 il.

Description

The invention relates to computer technology, automation, communication technology, and can also be applied in any part of the national economy where high speed and switching reliability is necessary.

There are switches containing a thyristor in each channel, the anode of which is connected to the first pole of the source via the appropriate load: this voltage, and the cathode to the emitter of the transistor. The control electrode is through the corresponding contacts, a zener diode and a resistor to the second pole of the power source 1.

The disadvantage of this switch is that the electromagnetic relay is connected in series with the thyristor /, as a result of which the speed of operation of the switch decreases, as well. the presence of a large number of radio elements reduces the reliability ..

Known commutators. Containing information inputs, first information outputs, positive power source bus, closing relay contacts, diodes, actuating relay, first additional electromagnetic relay, closing contacts of the second additional electromagnetic relay, neutral relay, negative power supply bus, disconnecting contacts of the neutral relay , closing relay contacts ON1. the second information outputs, the switching contacts of the first additional electromagnetic relay, the closing contacts of the executive relay. When forming one of the channels, a plus power source is supplied to the input of one of the on relay, the on relay is activated and blocked by its closing contact, as a result the executive relay is activated, closes its

contacts and connects one of the information inputs to the first information output.

To form a channel to the second information output, plus power supply 5, a second additional electromagnetic relay is applied, which operates and closes its contact, as a result of which the first additional electromagnetic relay is activated and switches its contacts to the second information output. The invention allows to switch one group of information inputs to two groups of output buses 2.15.

The disadvantages of this switch are the following:

the switch has a common disconnecting contact of the neutral relay, through which negative voltage 20 is applied to all of the on relay, which reduces the reliability of the switch;

The switch uses a large number of mechanical contacts of the relay, which also reduces the reliability of its work; 25

the channel on time is limited by the on time of the relay, which reduces the speed of the switch.

The closest technical solution is a switch containing in each 30 channels an electromagnetic relay, one end of which is connected to the control bus, and the other through a diode to a fixed contact of the electromagnetic relay, and a moving contact is connected to the negative bus. 35 The switching element is made on a transistor switch, the base of which is connected to the blocking bus and the collector to the turn-on bus. The electromagnetic relay and the fixed contact of each channel are connected via respective diodes to the turn-on bus and the lockout pin.

The disadvantages of this switch are the following:

each channel uses a mechanical contact for blocking the electromagnetic relay, which reduces the reliability of the switch;

the switching element is made on a transistor, which also: reduces reliability 50;

The electromagnetic relay of each channel is connected in series with the switching element, as a result of which the channel turn-on time is determined by the time of switching on the electromagnetic relay, which reduces the speed of the switch operation.

The purpose of the invention is to increase reliability and speed,

The goal is achieved by the fact that in a switch containing an electromagnetic relay in each of the N channels, the first and second diodes, the control bus and a common resistor for all channels, the first terminal of which is connected to the supply bus, the trip bus and the disconnect bus to which the anode of the first is connected diode of each channel, a zener diode is inserted, connected between the disconnecting bus and the point of connection of the second resistor with the response bus, and also a thyristor is inserted into each channel, the cathode of which is connected to the control bus, the control electrode is connected to the first cathode Vågå diode, and an anode connected to the supply bus via a solenoid coil and a tire actuation through the cathode-anode of the second diode.

The drawing shows a schematic diagram of the switch.

Accept designations: 1 - control bus; 2 - thyristor; 3 - output bus load; 4 - electromagnetic relay; 5 first diode disconnection; b - the second diode is disconnected; 7 — bus off; 8 — triggering tire; 9 - zener diode; 10- resistor; 11 - common plus power bus; 12 group of contacts for connecting information buses; 13 - a group of information buses input channels; 14 is a group of information buses of output channels.

Each channel has a control bus 1 channel, which is connected to the cathode of the thyristor 2, and the anode is connected via diode 6 to the response bus 8. The control electrodes are connected to the disconnect bus 7 via the first isolation diode 5. Electromagnetic relay 4 is turned off at one end on the positive bus 11, and the second on the output bus 3, which is connected to the anode of the thyristor 2.

The switching element is provided on a resistor 10, one end of which is connected to the positive bus 11, and the second to the response bus 8 and the zener diode 9, the cathode of which is connected to the response bus 8, and the anode to the trip bus 7.

An electromagnetic relay is used as a load resistance. The group of input information buses 13 through the normally open contact 12 is connected to the group of information buses 14.

The operation of the switch is as follows.

In the initial state on the control bus 1 there is no negative voltage. On the output bus 3, by means of the winding of the electromagnetic relay 4, positive potential is supplied from the common plus bus 11. Positive potential

From the positive bus 11, through the resistor 10, it goes to the response bus 8, as well as through the zener diode 9 to the disconnecting bus 7 and from the same bus through the isolation diodes 5 to the control electrodes of the thyristors 2.

The group of information buses 13 input channels connected to the normally open contacts 12 of the electromagnetic relay 4.

If necessary, commute a group of input information buses 13 of any input channel to a group of information buses 14 of the output channel, it is necessary to apply a negative voltage to the control bus of this channel (the common negative power bus is not shown in the drawing). When a negative voltage is applied to the control bus 1 of the first channel, the thyristor 2 is turned on, since there is a positive potential on its control electrode and on the anode. The thyristor of the first channel is switched on via the following circuit: positive bus 11, resistor 10, response bus 8, diode 6, thyristor anode 2, control bus 1.

As a result of the turn-on, a negative voltage appears on the output bus. Since, as a load resistance, an electromagnetic relay 4 is connected to the output bus 3, this relay operates according to the following circuit: positive bus 11, relay 4 winding, output bus 3. When relay 4 is turned on, contacts 12 and the group of information buses 13 of the first input channel connects to a group of information buses of output channel 14.

When the thyristor 2 of the first channel is turned on, the negative voltage from the thyristor anode goes through diode 6 to the response bus 8 and goes through the zener diode 9 to the disconnect bus 7. Since there is no positive voltage on the control electrodes of the thyristors during the operation of the channel there is no negative voltage on the control bus 1 of any channel, the switching on of the thyristors does not occur and the connection of any channel during the operation of the first channel is impossible. When the negative voltage is removed from the control bus 1 of the first channel, it is turned off and the circuit returns to its original state. The work of the other channels is the same.

If necessary, to control the switching on of channels, a signal lamp can be connected in parallel with the winding of the electromagnetic relay 4.

The advantage of this type of switch is the following.

Formation of the channel in the switch

carried out in a contactless manner

using thyristor and commuting

element, which increases the reliability of the switch.

Simplified circuit switching element, which is made on the resistor and the Zener diode.

An output bus has been introduced. To which it is possible to connect a load of both active and reactive nature, which i dramatically increases the speed of the switch.

The presence of a minimum number of radio elements and mechanical contacts, and

also the use of thyristors and commutator-. element made on a resistor and a zener diode, increases the reliability and speed of the switch. .

F o rumula and 30 bre. E. Switchboard containing in each of the N

-channel electromagnetic relay, the first and second diodes, control bus and common

for all channels, a resistor, the first output of which is connected to the power supply bus, the response bus and the bus disconnect, is connected to the coordinate of the anode of the first diode of each channel, which is

that, in order to increase reliability and speed, it contains a zener diode, which is connected between the disconnecting bus and the connection point of the second output of the resistor with the response bus, and in each channel

a thyristor is inserted, the cathode of which is connected to the control bus, the control electrode

- with the cathode of the first diode, and the anode is connected to the supply bus through the coil of the electromagnetic relay and to the response bus

through the cathode-anode of the second diode.

; j

15

13

Claims (1)

Claim . Switch containing in each of N - channels, an electromagnetic relay, first and second diodes, a control bus and a resistor common to all channels, the first output of which is connected to the supply bus, a trip bus and a disconnect bus, to which the anode of the first diode of each channel is connected, characterized in that, with In order to increase reliability and speed, it contains a zener diode, which is connected between the shutdown bus and the connection point of the second output of the resistor with the pickup bus, and a thyristor is introduced into each channel, the cathode of which is connected to the control bus, the control elec od - with the cathode of the first diode, and the anode is connected to the supply bus through the coil of the electromagnetic relay and to the trip bus through the cathode-anode of the second diode.