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Three-motor synchronous control system and control method for suspension conveyer chain

A technology of synchronous control and three motors, which is applied in the control system, AC motor control, and control of multiple AC motors. It can solve the problems of different moving speeds and different motor speeds, which cannot be ignored, and achieve fast response and synchronous control. High precision, avoid the effect of big ups and downs

Inactive Publication Date: 2017-05-31
JIANGSU COLLEGE OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] It can be seen that the main reason for the asynchronous movement of the various parts of the conveyor chain is that the actual speed of the motor is different under the same frequency command of the frequency converter due to the different motor loads.
But another factor cannot be ignored. The suspension conveyor chain is composed of more than 1,000 sections of 40 cm long chains. After hanging the workpiece, the chain will stretch a little, and some suspension conveyor chains will experience temperatures as high as 150 degrees Celsius. In some occasions, there will be places that experience cold water spray or forced air cooling, and the temperature factor will also cause the chain to elongate or shrink. The three-part chain, driven by motors with synchronized speeds, moves at different speeds

Method used

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  • Three-motor synchronous control system and control method for suspension conveyer chain
  • Three-motor synchronous control system and control method for suspension conveyer chain
  • Three-motor synchronous control system and control method for suspension conveyer chain

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Embodiment

[0054] Inverter selection: Inverter 1, Inverter 2 and Inverter 3 all use Delta VFD037M43B, whose input voltage is three-phase 380V, output power is 3.7 kilowatts, and has RS485 communication. PLC selection: Among them, the PLC basic unit adopts DVP64EHR3 of Delta EH series PLC, the PLC analog input unit adopts DVP04AD-H2, and the PLC analog output unit DVP04DA-H2, in which the input points are all 32 points, the output points are all 32 points, there are four One-way analog input and four-way analog output, with RS485 communication. See the table below for the address allocation of the input of the PLC analog input unit and the output point of the PLC analog output unit.

[0055]

[0056]

[0057] POD adopts Delta's B07S411 touch screen with a screen size of 7 inches and a resolution of 800×480; 65536 true colors; with three communication ports, supporting RS485\RS422\RS232 communication.

[0058] When the encoder is installed on the motor shaft of the finished product,...

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Abstract

The invention relates to a three-motor synchronous control system and control method for a suspension conveyer chain. A PLC basic unit, a PLC analog input unit and a PLC analog output unit are connected in sequence; the output end of the PLC analog output unit is connected with a frequency converter 1, a frequency converter 2 and a frequency converter 3 separately; the frequency converter 1, the frequency converter 2 and the frequency converter 3 are connected with a motor M1, a motor M2 and a motor M3 respectively; the PLC basic unit is connected with a network module, a POD touch screen, a speed measurement signal input part, the frequency converter 1, the frequency converter 2 and the frequency converter 3 separately; and the PLC basic unit and the PLC analog input unit are in signal input connection with each tensioning expansion joint position separately. By adoption of the three-motor synchronous control system and control method, a quite troublesome problem that alarming, caused by a non-mechanical fault, of a position limit switch can only be started by human intervention of a user can be solved, so that use efficiency of equipment is improved.

Description

technical field [0001] The invention relates to the technical field of industrial automation, in particular to a three-motor synchronous control system and control method for a suspension conveyor chain. Background technique [0002] Suspension chain conveyor line is an ideal equipment to achieve automatic and semi-automatic assembly line operations by continuously conveying items within the workshop and between workshops at an ideal speed according to the user's reasonable process line. It can be arranged arbitrarily in the three-dimensional space, can play the role of storage in the air, and save the use of ground space. The hanging conveyor chain is widely used in spraying and baking because of its long conveying distance, large operating speed range, turning, climbing, and flexible layout Drying, surface cleaning, electroplating, assembly and product storage and transmission and transshipment. [0003] Because the transmission line of some suspension chains is very long...

Claims

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Application Information

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IPC IPC(8): H02P5/74H02P27/04
CPCH02P5/74H02P27/04
Inventor 张建蓉
Owner JIANGSU COLLEGE OF INFORMATION TECH
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