SU816838A1 - Switch electric actuator control apparatus - Google Patents

Description

The invention relates to railway automation and telemechanics for controlling the switch actuator during electrical interlocking of switches and signals.

A device for controlling a switch motor drive is known, which contains a reversing motor with windings connected via working and control contacts of an autoswitch, a reversing unit, limiting resistors, diodes with common contacts of a starting switch relay, to the rear contacts of which a common control relay flj is connected

The disadvantage of the device is its use as a reverse unit. napolnogo combined polarized relay, which reduces its reliability.

The purpose of the invention is to increase reliability.

The goal is achieved by the fact that the reversing unit is made on two thyristors, the anode of one of which is connected to one working contact of the autoswitch, the cathode is connected to one motor winding, the anode of the other thyristor is connected to another, winding of the engine, and its cathode to

the other working contact of the autoswitch, variable resistors are connected between the anodes and the control electrodes of the thyristors, and a parallel-connected resistor and diode are connected between the control electrodes and the cathodes, and the control contacts of the autoswitch are connected directly to one common contact of the starting switch relay and through the limiting resistor and included counter - parallel diodes - with another common contact of the starting switch. e. The drawing shows a schematic diagram of the device.

The device contains a working battery 1 with polarity and negative poles, an electric motor 2 with windings 3 and 4, working "contacts 5

and b autoswitch and its control contacts 7 and 8, thyristors 9 and 10 reversals, diodes 11 and 12, resistors 13 and 14, and variable resistors 15 and 16, and the anodes of the thyristors y and 10 are connected respectively to the working contact 5 and the winding 4 electric motors 2, variable resistors 15 and 16 are connected between the anode cable and the thyristors 9 control electrodes

Claims (2)

1 and 10, coding 11 and 12 and parallel to them the resistors 1J and 14 connected to them are connected between the control electrodes and the cathodes of the thyristors y and 1, the cathode of the thyristor 9 is connected to the winding 3 in the Cavalry Poison and the cathode of the thyristor 1 and - with a clock 6 autoswitch . Contacts 5 in the autoswitch are interconnected and connected to one of the terminals of the common control relay 17 with contacts 1 / .1 and 17.2, the other terminal of which is connected to the electric motor 2 directly and the winding to the AC source. Through the limiting resistor 1, the diodes are connected respectively to the control contacts 7 and in the autoswitch. Through two contacts of the push-button relay 21, the starting switch-on relay 22 is connected with contacts 2.1 to 22.6, through the front contacts 22.3 and 22.4 of which the electric motor r is connected to the operating battery 1, and through contacts 17.1 and 17.2 of the common control relay 17 receives power supply 23 or minus 24 control relay. The device also contains contacts 25-27, respectively, of the auxiliary button, the switch track and closing relay. The device works as follows. In the initial state, when the switch is located in one of the extreme positions, for example in the pole position, the common control relay 17 is connected to the AC circuit and is bridged through the contacts 22.3 and .4 of the starting switch relay 22, contact 7 of the autoswitch by a diode 19 and a resistor 18. Through this diode and resistor passes at. This negative half-voltage on the alternating voltage (a) and the positive half-wave is closed through the winding of the relay 1 /, which is in the excited state of positive polarity. At the same time, through the contact 22.6 of the relay 22, 17.1 and 17.2 the relay 17 excited the positive control relay 2J, fixing the location of the arrow in plus position. . To switch the arrow from the positive position to the minus position, one of the contacts of the push-button relay 21 is energized by the relay 12, as a result of the excitation of which I switch from its polarized contacts-and the neutral is closed. Contacts / r2.3 and 22.4 relay i2. the winding of the relay 17 is disconnected from the motor circuit and the working circuit of the switch is closed, the passage through the winding of the relay 22 its contacts 22.5 and 22.6, 22.3 and 22. The contact 6 of the autoswitch, the thyristor 10 and the winding 4 of the electric motor 2. In this, the thyristor 10 is opened under the action of the operating voltage. And this voltage is applied to the electric motor, and the diode IV is turned off by the contacts 7 of the autoswitch, which opens at the start of the switch. In addition, the relay 17 is de-energized and switches off by the relay 23 contacts. At the end of the transfer, the arrows open the contacts b of the autoswitch and close the contacts 8. The working circuit opens, the thyristor 10 closes, the relay 22 operating under the operating winding de-energizes including the control circuit by the contacts 22.3 and 22.4. . The voltage of the control circuit is chosen less than the voltage of the operating circuit, which is necessary to prevent the thyristors from tripping. Under the action of this voltage, resistors 1316 determine the opening voltage of the thyristors and are selected depending on the voltage of the working battery. Diodes ll and 12 prevent thyristors 9 and 10 from failing in the event of a negative voltage in the operating circuit. The reverse voltage loading of the diodes 19 and 20 selects more operating voltage to eliminate their breakdown when turning the switch. The proposed device allows the reversing relay to be rejected in a two-wire arrow control circuit, thereby eliminating the need for a track box and simplifying installation and maintenance of the device. The invention is a device for controlling a block electric drive, containing a reversible electric motor with windings connected via the working and control contacts of an autoswitch, a reversing unit, limiting resistors, diodes with common contacts of the starting switch relay, to the rear contacts of which there is a common control relay, which is different In order to increase reliability, the reversing unit is made on two thyristors, the anode of one of which is connected to one working contact a switch, the cathode is connected to one motor winding, the anode of the other thyristor is connected to another motor winding, and its cathode is connected to another working contact of the autoswitch, the variable resistors are connected between the anodes and the control electrodes of the thyristors and a diode, with the control contacts of the automatic switch connected directly to one common contact of the starting switch relay and through the limiting resistor and the connected anti-pa ellelno diodes - the other common contact of the switch trigger relays. Sources of information taken into account during the examination 1. Cossack A.A. Relay centralization of arrows and signals. M., Transport, 1978, p.97. p. 2 .gO 1