SU1307448A1 - Control device for electric drive - Google Patents

Description

The invention relates to general purpose control and control systems and can be used in automatic control systems of electric drives, in particular, in organizing autonomous control from several posts.

The purpose of the invention is the extension of the functions performed by ensuring the change of the operating mode of the device from control stations.

The drawing shows the structural and functional diagram of the device

The device contains a time relay 1, a switching unit 2, a switching power unit 3, element 4 And, a relay element 5, a sensor unit 6, a switch 7, a type of operation, a magnetic starter 8, a stop button 9, a start button, an electric drive 11, a switching unit 2 The first 12th and sixth I relays, the power switch unit contains the seventh J8 - eleventh 22 relays.

The device works as follows.

The drive control device can be set to either automatic control mode or manual mode. To set it to the automatic control mode, you must simultaneously press the IO Start button and the 9 Stop button at any of the control stations. At the same time, from the buttons 9 and O simultaneously arrive signals at the inputs of element 4 I, and at its output there appears a signal which arrives at time relay 1. Time relay 1 is triggered and from its output a signal is sent to relay element 5, which prevents cHrHajja from passing from Start button 10, as well as to fifth 16 relays of switching unit 2. Relay 16 operates and prepares the circuit for the operation of the first 12 relays. In addition, signals from Start button 10 and Stop buttons 9 go to the fourth 15 and second 13 relays, respectively, which activate and break the circuit of the first 12 relays. When the 10 Start button and the 9 Stop buttons are released, the signals from the input of time relay 1 and the fourth 15 and second 13 relays are removed. At the output of time 1 relay, a certain time (determined by the setting of the relay) is saved and the fifth 16 relays remain in the actuated state. The fourth 15 and second 13 relays close their contacts, and in the absence of signals of overload from the magnetic starter

8, the circuit of the first 12 relays is activated and it is activated. With one contact it blocks the contact of the first 16 relays, with the other, it locks the block of 6 sensors to the seventh 18th and eighth 19 relays. Thus, the control device. electrically driven to automatic control. When a start signal is received from the sensor unit 6, the eighth 19 relay of the power switching unit 3 is triggered and the ninth 20 relay circuit is activated, which is triggered and with one contact blocks the eighth 19 relay contact, the other issues a signal through switch 7 of the type of operation to trigger the magnetic starter 8 and drive start 11. When the start signal is removed, drive 1I remains in an on state. With

When the signal to stop comes from the sensor unit 6, the seventh 18 relay of the power switching unit 3 triggers, which operates and breaks the circuit of the ninth 20 relay, which releases and removes the signal from the magnetic starter 8. The magnetic starter 8 turns off the electric drive 11. When the stop signal is removed the drive 11 remains in an off state SRI.

To switch to manual control mode, one of the 10 Start or 9 Stop buttons must be pressed at any control station. When this happens, the fourth 15 relays or the second 13 relays. The circuit of the first 12 relays is broken and it releases, disconnecting with its contacts the block 6 of the sensor of the seventh 18 and eighth 19 relays. In Thai manner, the drive control device goes into manual control mode. In this case, when the 10 Start button is pressed, the eleventh 22 relays are triggered and the ninth 20 relays are activated, which are triggered. With one contact, it blocks the contact of the eleventh 22 relays, and with another it issues a signal through switch 7 of the kind of work for actuating the magnetic starter 8 and starting the electric drive I1. When releasing the button 10, Starting the ninth 20 of the relay remains in the actuated state of the SRI, and, consequently, the electric drive 11 continues to operate. When you press the 9 Stop button, the tenth 21 relays are triggered and breaks the circuit of the ninth 20 relay, which releases and removes the signal from the magnetic actuator 8. The magnetic starter 8 turns off the electric drive 11. When you release the button 9 Stop, the ninth 20 relay remains in the released state, consequently, the electric drive 11 remains in the disconnected state. When a signal is received on the overload of the electric actuator 1I from the magnetic actuator 8, it triggers the sixth 17 relays and by its contact breaks the circuit of the first 12 relays. The device switches to the manual control mode, which eliminates repeated automatic starts of the electric drive 11 according to a signal from the block of 6 sensors.

When translating the switch of the 7th kind of work to the Local position, the third 14 relay is triggered and with its contact it breaks the circuit of the first 12 relays. The device enters the manual control mode. In addition, the circuit is broken between the contact of the ninth 20 relay and the magnetic starter 8. In this case, the control is carried out using the buttons of the magnetic starter 8.

Claims (1)

Invention Formula A motor control device comprising a sensor unit whose output is connected to a fourth Compiled by B. Kirsanov Editor N. Kishtulinets Tehred I. Popovich Corrector L. Pilipenko Order 1631/48 Circulation 864 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 . Production and printing company, Uzhgorod, Projecto st., 4 the input of the switching unit, the output of which is connected to the first input of the power switching unit, the output of which is connected to the information input of the type of switch, and a magnetic starter, the first output of which is connected to the input of the electric drive, and the second output to the third input of the switching unit and The second inputs of which are connected respectively to the output of the time relay and the second output of the switch of the type of work, the second input of which is the control input of the device, and Also, p-electrically combined Start buttons and p-electrically combined Stop buttons, where p is the number of posts that are connected to the second input of the power switching unit, characterized in that, in order to expand the functions performed by providing a change in device operation modes autonomously with p control posts, injected into it The element And the relay element, the output of which is connected to the third input of the power switching unit, the information input is connected to the output of the relay, and the control input relay element is combined with the sixth input of the switching unit, the second input of the element And is connected to the Start buttons, the second input of the power switching unit is combined with the fifth input of the switching unit and the first input of the AND element, the output of which is connected to the input of the turnips time.