We can provide free samples . Please contact Email for any inquiries

1.1 The main drive control system
Bars line the main drive motor DC motor selection , eighteen mill through 18 sets of single-action DC main motor drag , the main motor drive system using Siemens 6RA70 regulation as the core component parts to imported production lines for the production of high-power thyristors integral part of the core power , both through grafting techniques together form a reliable motor control devices , the performance of such devices can reach the international advanced level , with high performance and low cost .
    1) 6RA70 adjust cabinet: Siemens 6RA70 series of advanced digital DC speed control device performance, reliable quality , unanimously approved at home and abroad . Cabinet with a desk 6RA7018 digital device as the core, the motor speed control . CBP communications board by the Internet, participate in online real-time closed-loop control and regulation looper . Setpoint main drive has issued a host PLC , transmitted via PROFIBUS-DP network 6RA70 to digital signals. Motor speed feedback provided by the pulse encoder to detect , directly to 6RA70, also as digital signals. This figure given (PLC) + digital adjustment (6RA70) + digital feedback (encoder ) ? high-performance, high -quality all- digital DC speed control system .
2 ) Power cabinet : the six -power thyristor rectifier system with RC absorption and fast-acting protection. Single rated current of up to 1600A-2500A, 2400A-3750A overload of one minute , fully meet the electrical demand and production requirements.
3 ) Technical characteristics :
A. has a high technical nature
The system uses a distributed computer network consisting of automated control systems. In the stand-alone drive automation solution , not only with sufficient control environment and conditions for the full range of automation , and automation across the board before implementation can be achieved within the FBI transmission between groups mill , monotonous control , with high technical nature .
B. reliability with high speed mill
    Adjust cabinet unity Siemens 6RA70 Digital DC converter with high reliability.
a) Interface capability : a switch input and output , analog input and output functions ; has two kinds of tachometer and encoder speed feedback , and have the ability to separate the Internet .
b) protection of strong performance : 6RA70 label itself has a fault , failure to check the operation more clearly the fault classification , fault message more easy troubleshooting . Protection of sensitivity, reliability actions are by far the best system . The main protection are: over-current , over- voltage, over -speed , loss of excitation , power , speed machines break , stall, motor overheating, power cabinets overload .
4 ) Control system performance
    1 ) Speed ??range: 1:20
    2 ) system regulation accuracy : 0.01%
    3 ) Static downhill : 0.2%
    4 ) Dynamic downhill : 1%
    5 ) Recovery Time : 200ms

1.2 auxiliary drive control system
     Furnace area, the main AC drive auxiliary equipment area and finishing rolling collection area using relay contactor control. For repeated short-time work load, start using resistors, electro-hydraulic brake; For continuous duty loads, the use of direct start-up mode control. Control systems are used to control the subregion PLC, the control system to improve the full range of advanced, reliable, simplifying the hardware line, easy maintenance, realization of a computer network.
Hot delivery roller, roller furnace installed, weighing roller, roller descaling, baked roller, pinch roller, replace the roller and roller cooling bed input AC variable speed motor Schneider ATV68, 71 series all-digital AC frequency converter control. DP communication board control device, connected to the PROFIBUS-DP network, the main and auxiliary drive PLC to communicate with, receive control commands and feedback system signals. Set free by the upper roller speed.