| 摘要 |
<p>PURPOSE:To prevent a tip end deformation due to loop phenomenon at the time of biting of a rolling stock and to improve the yield. CONSTITUTION:The device is provided with a rolling roll 2, motor 3, speed detector 4, current detector 5, speed regulator 7 which operates so that a detected value of the speed of the motor 3 coincides with a command value, current regulator 8 and power converter 6 which control the motor 3 so that a detected value of the current of the motor 3 coincides with a command value, and observer 13 which estimates a load torque from the detected value 12 of the current and the detected value 10 of the speed; and control is carried out by using a current command value added with an observer output as the final current command value. The device is also provided with a switch 19 for giving a higher speed command 9 than in the normal time by adding an auxiliary set value 21 to the speed command value 9 in the normal time before the generation of biting, a comparator 17 for comparing a negative torque estimate with a reference level, and a timer 18 for removing the auxiliary set value in a specific time after the negative torque estimate exceeds the reference level.</p> |
