Steel belt steady-speed operation control method

Abstract

The invention discloses a steel belt steady-speed operation control method. According to the steel belt steady-speed operation control method, a common motor with a constant operation speed is adopted, and a permanent magnet eddy current flexible transmission ASD is arranged between the motor and a steel belt driving roller; a PID simulation constant speed control system and a simulation output sub module are arranged in PLC; a steel belt speed tester is arranged at the outlet of an annealing furnace; the PID simulation constant speed control system is used for realizing proportion, integrating, and differentiation processing of the difference value between an annealing furnace outlet steel belt speed process value and a preset value, outputting standard 4-20MA control signals, controlling each ASD, controlling steel belt speed via adjusting magnetic induction intensity between permanent magnet loading of the motor and the steel belt driving roller, and ensuring steel belt steady speed operation, wherein the annealing furnace outlet steel belt speed process value is obtained via testing by the steel belt speed tester. The steel belt steady-speed operation control method is capable of reducing motor vibration and wear, eliminating motor resonance hidden troubles, saving energy, ensuring stable steel belt operation speed, eliminating belt broken accidents, and improving silicon steel product quality; control is accurate; installation is convenient; and when the steel belt steady-speed operation control method is compared with a variable-frequency speed-regulation modulation method, 20% of electric energy is saved.

Description

technical field [0001] The invention belongs to the technical field of steel rolling technology, and in particular relates to a method for controlling the steady-speed running of a steel strip in a continuous annealing production line. Background technique [0002] The speed control of the steel strip in the traditional cold-rolled silicon steel plant is to use the frequency conversion speed regulator and the frequency conversion speed regulation motor. Each motor is installed with its own speed detector to realize its own speed control. A continuous annealing production line has 200 sets of variable frequency speed regulators and variable frequency speed regulation motors, so the running speed control of the steel strip is cumbersome and inconsistent. When the steel belt and the drive roller lose rotation or the speed difference between them is large, it is difficult to realize the constant speed operation of the steel belt, and fluctuations and even resonance often occur,...

AI Technical Summary

Problems solved by technology

The motor controls the load with the frequency conversion speed regulation method to waste electric energy, the frequency conversion speed controller and the frequency conversion speed regulation motor are damaged and the danger is great