Multi-motor synchronous control system of belt conveyor

Abstract

The invention discloses a multi-motor synchronous control system of a belt conveyor, comprising an upper computer, a synchronous controller, an RS-485 bus system, transducers and motors. The synchronous controller comprises a power supply module, a control module, a USB (Universal Serial Bus) interface module and RS-485 communication interfaces, wherein the USB interface of the synchronous controller is connected with the upper computer, the RS-485 communication interfaces are connected with the RS-485 communication interfaces of the transducers through the bus system, the transducers are connected with the motors, and the synchronous controller acquires the operation parameters of various motors in the system through buses, adjusts the parameters of the transducers and controls the output rotating speeds of the motors by analyzing the parameters of the motors and generating control signals so that the rotating speeds of the running motors are uniformed, and the upper computer can read or write the relative parameters of the synchronous controller to carry out the online debugging and implement the full-process monitoring to the system and lighten the operation intensity for debugging and operation. The bus system ensures that the structure is simplified and the mounting cost and the maintenance cost are reduced.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a multi-motor synchronous control system for a belt conveyor. Background technique [0002] The continuous conveying system is a basic part of material handling machinery, and the belt conveyor is the most efficient and most commonly used type of continuous conveying machine. Before the 1980s, the driving device of the belt conveyor was mostly an electric motor, which could meet the production requirements. Multi-motor drive. With the use of large belt conveyors, problems such as system stability, energy consumption, and safety have emerged. The synchronous control technology for the transmission motor of large-scale belt conveyor mainly includes parallel control, master-slave control, cross-coupling control, virtual master shaft control, and deviation coupling control. Among them, the control strategy of cross-coupling control was first proposed by Koren in 1980. The ma...

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Problems solved by technology

This deviation coupling control strategy can overcome the shortcomings of the above control strategies and achieve good synchronization performance, but it is very difficult to set the gain Kr

Most of the current belt conveyor control systems are based on PLC control systems, which mainly have the following disadvantages: the system is complex and the cost is high; the structural reasons of the PLC control system itself cannot realize advanced control algorithms, so that the multi-motor synchronous motion error is large, Low precision and poor coordination, especially when starting and stopping, the belt system vibrates greatly and the synchronization is worse

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