| 摘要 |
PURPOSE:To exclude the looper, and to remove the motor impact drop, by detecting the tension and the speed of the rolling mill, by correcting the speed set value, and by controlling the speed depending on above corrected set value. CONSTITUTION:The rolling load is given by the rolling load detector 11, and the difference DELTAP3 between this rolling load and the maximum forecast value P3X is input to the torque converter 18. The torque converter 18 operates the torque deviation DELTAtau. The multiplier 16 operates the product of this torque deviation DELTAtau and the output signal of the function generator 17; product is converted into the voltage value and the electric current value by the gain adjusters 14, 15; hereby, the outputs of the speed controller 5 and the electric current controller 6 are corrected. The load compensator 8 compensates the speed change due to the impact drop, etc.; the motor load torque of each stand and the rolling load given by the rolling load detector 11 are input to the tension controller 9 which then corrects the speed set for each stand. The speed ratio adjuster 10 adjusts the speed ratio between adjoining stands, so as to prevent the rolled material 1 from building up the loop between two stands. |
