Application of FGI FD200 Series Low Voltage Frequency Inverter in steel rolling process

The steel rolling process is a crucial part of the steel production process, which involves rolling heated billets gradually through a series of rolling mills to the desired shape and size. This process has very high requirements for speed control, torque regulation and system stability. The FD200 series low voltage frequency converters from FGI, with its advanced vector control technology, high-precision speed regulation capability and intelligent control system, demonstrate excellent performance and reliability in the steel rolling process.

1.Introduction to steel rolling process

The steel rolling process mainly includes rough rolling, middle rolling and finishing rolling stages, each stage requires precise control of the speed and torque of the mill to ensure the dimensional accuracy and surface quality of the final product. Traditionally, this has often been achieved through mechanical or hydraulic systems, but these methods struggle to meet the flexibility and efficiency requirements of modern production. The use of inverter driven motors can provide a more flexible and efficient solution.

2.FD200 low voltage frequency inverter application advantages

Vector control technology: FD200 series frequency inverter adopts advanced vector control algorithm, which can achieve accurate adjustment of motor speed and torque to ensure speed consistency and stability during rolling.

Fast response: millisecond speed and torque adjustment ability to quickly respond to process changes, improve production efficiency and reduce scrap rate.

Optimize energy management: Automatically adjust the working state of the motor according to the actual load demand, avoiding unnecessary energy waste and significantly reducing energy consumption.

Multiple protection mechanism: built-in overvoltage, undervoltage, short circuit, temperature monitoring and other protection functions to ensure the safe operation of the equipment under various working conditions.

Prolong the service life of the equipment: The optimized energy scheduling strategy reduces the damage caused by overload or other abnormal conditions, and extends the service life of the equipment.

Remote monitoring and maintenance: Support Modbus, Profibus, Ethernet and other communication interfaces, easy to integrate into the existing automatic control system, and achieve remote monitoring and fault diagnosis.

3.Specific application scenario

(1) Roughing stage

In the rough rolling stage, the billet needs to be rolled several times to reduce its thickness and width. The FD200 series frequency inverter can dynamically adjust the speed and torque of the mill according to the initial size of the billet and the required finished product specifications, ensuring that each layer of rolling can achieve the desired effect.

(2) Middle rolling stage

In the middle rolling stage, the dimensional accuracy of the product is higher. The FD200 frequency inverter can ensure the uniform deformation of the billet during the rolling process through accurate speed control and torque adjustment, and reduce the product defects caused by speed mismatch.

(3) Finishing stage

In the finishing rolling stage, the product is close to the final form, and the control of speed and torque is particularly critical. The FD200 frequency inverter provides a millisecond response speed, ensuring that every process can be successfully completed, and the final output of high-quality steel.

(4) Fault diagnosis and prevention

The built-in intelligent diagnostic system can monitor the operating status of the equipment in real time, and once a potential problem is found, it can immediately issue an alarm and record fault information, helping maintenance personnel to take timely measures to reduce downtime.

4.Implementation effect

(1) Improve production efficiency

Through precise speed control and intelligent management, the FD200 series frequency inverter significantly improves the overall efficiency of the steel rolling line, reducing downtime and scrap rates, and increasing the yield.

(2) Decrease operating costs

In addition to the direct energy-saving effect, due to the reduced frequency of equipment maintenance, maintenance costs are also correspondingly reduced, further reducing the operating costs of enterprises.

(3) Improve the working environment

Thanks to an advanced energy management system, noise levels and heat emissions are effectively controlled, improving the working environment in the workshop and increasing employee job satisfaction.