SU374212A1 - DEVICE FOR CONTROL OF SWITCH ELECTRIC DRIVE - Google Patents

Description

The invention relates to automation and telemechanics in railway transport and can be used for remote control of a switch-type electric drive.

Devices for controlling a switch-actuator are known, which include electric drive, starting and control relays, linear wires, reversing, and other devices.

The aim of the invention is to increase the reliability of work.

This is achieved by the fact that the reversing device is also designed as a four-winding relay with diodes and capacitors. The beginning of the first and second windings are connected to the corresponding wires and wires, the horses of the same windings are connected to the common line wire through a coupling capacitor, and the beginning of the third and end of the fourth windings are connected to the anodes of the respective diodes, the cathodes of which are connected to the end and the beginning same windings.

FIG. Figure 1 shows schematically the proposed device in the case of using a three-phase motor; in fig. 2 shows the connection circuit of the windings of the reversing device.

The circuit in FIG. 1 contains a starting polarized relay 1, a neutral starting relay 2, two control relays 3 and 4 of the combined OT, a reversing device 5, control transformers 6 and 7, two semi-periodic rectifier 8, buttons 9, the JO contact of a polarized relay, contacts L- 16 neutral relay, contacts 17 and 18 of the polarized control relay, capacitor 19, contacts 20-23 of the reversing relay, contact 24 of the control relay, resistors 25 and 26, contact 27 of the neutral relay, button 28, line wires 29, 30, 31, transformers 32 33, 34

current,

The reverse device is made in the form of a four-winding compact relay. The primary windings 35 and 36 of the three-phase motor are connected together with the capacitor 37

in the linear wires according to the phase-sensitive scheme, and the windings 38 and 39 are closed at the diodes 40 and 41, respectively. In the case of application of a DC-series servo motor, all areas of the four-winding relay are switched on by

relay circuit nosgo current with a continuous connection of all windings. In this case, the diodes 40 and 41 should be turned off.

The control circuit of the device is made with the use of three line wires. She is

connected to an alternating voltage source through a nost control transformer 6, in the secondary winding of which a floor control transformer 7 is connected with a two-half-rectifier rectifier 8 in the secondary winding. The load of this rectifier are two series-connected control relays 3 and 4 of the combined type, to which only a constant voltage is applied.

The phase control console contains three current transformers 32, 33 and 34, the secondary windings of which are connected in series with the self-blocking winding of the relay 2.

When the switch is in the minus position, the button 9 is pressed. As a result, the excitation winding of the relay 2 is activated according to the penalty passing through the co-tact 10 of the relay 1 and the contacts // and 12, which are intended to test the possibility of the transfer of the arrow according to the traffic safety conditions in the electrical system centralization. After the relay 2 trips, the relay 1 is activated along the circuit passing through the terminal 13 of the relay 2. The switched contacts 14, 15 and 16 of the relay 2 and / 7 and 18 relays / close the operating circuit. In this case, the ycTpoiicTBo 5 reversible is activated, and with its co-tacts 20, 21, and 22 it connects the motor windings to the line wires through the working contacts 42, 43, and 44 of the drive's autoswitch. The shift of the arrow to the minus position begins. Relay 2, disconnected from the power supply by contact 10 of the relay /, continues to hold its measles in the tightened position along the holding coil, which is included in the phase monitor 1), during the transfer of the arrow. When there is an operating current circuit in all three phases, the transformers 32, 33 and 34 of the current enter into saturation, therefore the resulting voltage at the output of the phase-cutter console is equal to the sum of the third harmonic voltages of the secondary windings, which ensures self-blocking of the starting relay 2. At the end of the translation, the arrows switch co-switches autoswitch, open circuit operating current. A control current circuit is simultaneously created. Terminal 24 checks for the contact positions of the relay / and device 5 and the drive autoswitch. Resistors 25 and 26 limit the currents in the control value when it is short-circuited. Pin 27, belonging to relay 2, and button 28 are used in moving the arrow to the positive position, which is done in a manner described above.

Subject invention

A device for controlling a switch-actuator containing starting and control relays, a reversing device, an electric drive with auto-switch contacts, linear wires connecting control and monitoring circuits with an electric drive start circuit, a phase-controlled unit, reversing unit, and the device and power supply unit characterized by in order to increase reliability of operation, the reversing device in it is designed as a four-winding relay with diodes and a capacitor, with the beginning of the first and second windings connected to the corresponding ineynymi nrovodami, the ends of these windings via a coupling capacitor coupled to a common line conductor, and the beginning end of the third and fourth windings are connected to anodes of respective diodes whose cathodes are connected to the end and the beginning of the same winding.

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