SU1171948A1 - Multimotor electric drive for continuous production line - Google Patents

Abstract

1. MULTI-MOTORED EZHK ROPROVOD OF A FLOW LINE, containing electric motors, the main windings of which are connected to speed controllers, compensators connected to position sensors, the output of each of which is connected to a corresponding speed controller, limit switches that differ from In order to improve performance, a compensator position control unit was inserted into it, with the block inputs connected to the limit switches, and the outputs to the inputs of the corresponding speed regulators. 2. The actuator according to claim 1, characterized in that the control unit for the position of the compensators contains logic circuits AND by the number of electric motors, the inputs of the logic circuits AND being connected to the limit switches, and the outputs to the inputs of the corresponding speed regulators.

Description

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The invention relates to electrical engineering and can be used in flow lines primarily in the processing of textile webs, where the web always moves in one direction.

The aim of the invention is to increase productivity.

FIG. 1 shows a diagram of an electric drive; FIG. 2, 3 are variants of the circuit for controlling the position of compensators.

The multi-motor electric drive of the production line contains electric motors 1-5, the main windings of which are connected to speed regulators 6-10, compensators 11-14 connected to position sensors 15-18, the output of each of which is connected to speed regulators 6-10, respectively 19, the position control of the compensators 11-14, and the inputs of the control unit 19 are connected to the limit switches 20-27, and the outputs to the inputs of the regulators 6-10.

The compensators 11-14 are between the stops 28-35, and the shafts of the electric motors are articulated with the machines 36-40. In addition, the position control unit 19 of the compensators 11-14 (FIG. 2) contains logic circuits AND 41-45, one of the inputs of the circuits AND 41, 45, and two inputs of the circuits And 42-44 are connected to the end switches 20, 27 and 21-26, respectively, the second inputs of logic circuits 41 and 45 are connected to the zero bus, the inputs of logic circuits 41-45 are connected to the inputs of speed controllers 6-10.

A second embodiment of the control unit 19 for electric drives with different dynamic characteristics of the machines is possible.

In this case, the control unit 19 consists of interconnected inputs and outputs of logic devices 46-50, built identically. Logic device 47 has the element OR 51 and 52, the outputs of which are connected to the inputs of the element OR 53. The end switch 21 is connected to the input of the element OR 51 and the limit switch 22 - with the element OR 52 The signal from the output of the limit switch 21 is fed through the element NOT 54 to the input of the element AND 55, to another input of which the signal comes from the output of the element OR 52. The output is finite 82

The main switch 22 is connected through the element NOT 56 to the input of the element And 57. The extreme logic devices 46 and 50 are made similar to the logic device 48, and the unused inputs are closed to the zero bus. Outputs to the left of logic device 46 and to the right of logic device 50 (FIG. 3) are not used and are not connected anywhere.

Multi-motor drive works as follows.

Let the fabric form a loop when the line is stopped (a loop can also be formed if a piece of fabric is sewn into the fabric cloth during the stop) in the compensator 12, and the compensator carriage 13 moves up to the stop 33. When starting

the lines for filling speed require that the electric motors supplying the fabric to the compensators with the carriage at the bottom stop are worth it (otherwise the fabric is wound on the supply shaft).

It is necessary to stop the electric motors pulling the fabric out of the compensator with the carriage at the upper stop. In this case, when starting the line, the electric motor 2 stands, since

the compensator 12 presses the limit switch 22, from the output of the second signal is sent to the control unit 19. nor through the logic circuit 42 control block 19

on the speed controller 7, stopping the electric motor 2. The electric motor 4 also stands, as the compensator carriage 13 presses the limit switch 25, which

through the control unit 19, the position of the compensators stops the electric motor 4. The electric motors 1, 3 and 5 are turned on. The electric motor 3 of the machine 38 lowers the compensator

13 and enables the start of the motor 4 of the machine 39. Upon completion of the loop sampling in the compensator 12, the limit switch 22 is released, which gives permission to turn on the motor 2. The speed of the motors 1–5 is synchronized by the signals of the positional sensors 15–18.

In the case of block 19

control (Fig. 3), the device operates as follows.

Let it be similar to the considered case before starting the electric drive.

3

in the compensator 12, a loop was formed, and the compensator carriage 13 rose up to the stop 33. At the start of the line, simultaneously with the electric motor 2, the electric motor 1 stands on the material supply side to the compensator 12, as can be seen from the work, the compensator position control unit 19. Electric motors 1 and 2 on the supply side are simultaneously turned on at the time of loop sampling in compensator 12 by electric motor 3. Also, electric motor 4 and electric motor 5 are on the side of sampling fabric from compensator 13 until the compensator carriage 13 departs from upper stop 33. Electric motors 4 and 5 are turned on. side sampling tissue from the compensator 13 occurs simultaneously. Simultaneous shutdown of all engines of the line segment with electric motor719484

bodies 1, 2 and 4, 5 allows the line to be started without unnecessary shutdowns of individual machines, which reduces the tension between the machines 36 and 37, 38 and 40, since the shutdown of the electric motors 1 and 5 is caused by the departure of the compensators 11 and 14 to the extreme position.

Thus, when a multi-motor electric drive operates in the refueling mode, there is no need for visual monitoring of the material loop sampling, regardless of where the lead motor is installed, the line filling process with a cloth is simplified and allows you to automate the start of the line regardless of the value of the position control range. speed, including DC motor with a common power source.

Claims (2)

1. MULTI-MOTOR ELECTRIC DRIVE OF THE FLOW LINE, containing electric motors, the anchor windings of which are connected to the regulators, speeds, compensators, connected to position sensors, the output of each of which is connected to the corresponding speed regulator, limit switches, which distinguishes with the fact that, in order to increase performance, it introduced a control unit for the position of the compensators, and the inputs of the unit are connected to the limit switches, and the outputs to the inputs of the corresponding speed controllers. 2. The actuator of claim 1 of t n u sistent _with the fact that the block controlled © Lenia position compensator comprises a logic AND circuit according to the number of motors, the inputs of the AND circuit connected to the limit switches and the outputs - to the inputs of the respective controllers speed.