| 摘要 |
<p>PURPOSE:To reduce variance in plate thickness by comparing a voltage or a reverse starting voltage of a reel motor with a rolling speed of a rolling mill and changing the target current value of the reel motor in proportion to a difference between the above voltage and the above speed. CONSTITUTION:On the rolling stage for a stock 2 to be rolled a deviation arithmetic unit 31 calculates a deviation based on received inputs of the number of rotations of a mill motor 3 of a rolling mill 1 from a detector 33 and an armature current and a motor voltage of a motor 11 of a reel 4 and outputs the calculated deviation to a gain adjusting device 32. The device 32 multiplies the inputted deviation by a gain and outputs the product to a reel motor current controller 14 in the stock 2 inlet side as a target current correcting signal. The controller 14 outputs a motor voltage correction signal for performing current controls to a power unit 12 based on the set target current value and a target current correction signal of the reel motor, an arithmetic current inputted from an armature current detector of the motor 11, and a control signal inputted from a plate thickness controller 34 to change the voltage of the motor 11.</p> |
