Drive control (Drive), motor control center (MCC), and auxiliary machine control system (MCS) are the key electrical control platforms for modern papermaking industry to achieve high-precision and high-stability production. Based on first-class foreign hardware and technology, coupled with mature and advanced programming technology, using rich engineering experience and perfect comprehensive set capabilities, Gaoda Technology's electrical and drive control system undertakes electrical and drive control and rewinder control systems for various types of paper machines at home and abroad.
The paper machine transmission control system is an important system to ensure the stability, efficiency and accuracy of the paper production process. The production process of the paper machine involves multiple links, such as raw material preparation, pressing, drying, coating, winding, etc. Each link requires precise transmission control. The key to the transmission system is to ensure that all components work together to ensure paper quality, production speed and energy saving. This control system involves motor drive, synchronous control, tension control, frequency conversion speed regulation, intelligent control, energy saving and consumption reduction, etc.
The Motor Control Center (MCC) of the paper production line is a key facility for managing and controlling all motors and their drive systems in the entire production line. It ensures the stable operation of the motors and the continuity and efficiency of the production line. The motor control center usually integrates the functions of starting, stopping, protecting, and monitoring the motor, and can achieve efficient and precise control of the entire production line; at the same time, the MCC undertakes many important tasks such as protecting equipment, saving energy and reducing consumption, and fault diagnosis.
MCS (Machine Control System) is a subsystem of the entire paper machine control system, and its structure is completely similar to the DCS system structure. MCS is more inclined to logical control, and the control object is the main mechanical equipment of the paper machine and related auxiliary equipment. It is an auxiliary control system that ensures that the equipment performs related actions in accordance with process and safety requirements, including the control of related equipment such as the forming part, pressing, drying, sizing, calendering, winding, coating, lubrication system, oil pressure system, air compression system, alarm monitoring system, etc. of the paper machine. Compared with DCS, there are more interlocking controls between MCS and the main transmission system of the paper machine, so it is increasingly considered together with the main transmission system during project implementation.
MCS mainly controls: tensioning of the net, deviation correction and alarm system, lifting and pressurization control of the roller, operation and interlocking control of the high-pressure water spray pipe, lifting and moving control of the surface scraper, monitoring of the hydraulic station, monitoring of the air compressor system, etc.
MCS consists of a human-machine operation interface, a signal input interface, an execution output drive, an alarm warning system, a safety interlock, a network, and an auxiliary power supply. It detects the status of equipment through a large number of various detection sensors installed on site, executes relevant operation instructions and logical operations, and outputs corresponding signals to drive equipment such as motors, solenoid valves, servo valves, cylinders, and oil cylinders to achieve the purpose of machine control.
MCS usually adopts a combination of central controller and distributed IO, using high-speed bus network to reasonably distribute the locations of IO stations to achieve the goals of higher automation, optimal total project cost and more complete control.
