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    • 19. 发明公开
    • Method in connection with unwinder
    • 与退卷机有关的方法
    • EP2206667A2
    • 2010-07-14
    • EP10150399.3
    • 2010-01-11
    • ABB Oy
    • Leppä, AriGruzdaitis, Jukka
    • B65H26/02
    • B65H26/025B65H2513/11B65H2515/116B65H2515/322B65H2220/03B65H2220/01B65H2220/02
    • 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.
    • 一种用于使造纸机中的逆变器控制的机器卷轴减速的方法和装置。 所述方法包括以下步骤:检测来自机器卷筒的纸幅中的断裂;确定机器卷筒的惯性;连续地确定机器卷筒的角速度;基于以下步骤连续地确定使机器卷筒减速所需的扭矩 惯性和角速度,用于在预定时间内停止机器卷筒,使机器卷筒减速以使其停止,并且当机器卷筒的旋转速度低于预定旋转速度时使用机械制动器,并且当 由电气减速获得的转矩太小而不能在预定时间内停止机器卷轴。