| 摘要 |
<p>A method and apparatus for decelerating an inverter-controlled machine reel in a paper machine. The method comprising the steps of detecting a break in a paper web from a machine reel, determining the inertia of the machine reel, determining continuously the angular speed of the machine reel, determining continuously the torque required to decelerate the machine reel on the basis of the inertia and angular speed for the purpose of stopping the machine reel in a predefined time, decelerating the machine reel electrically to stop it, and using a mechanical brake when the rotation speed of the machine reel is lower than a predefined rotation speed and when the torque obtained by electrical deceleration is too small to stop the machine reel in a predefined time.</p> |
