Control arrangement for a roll carrier
AssigneeSiemens Aktiengesellschaft
InventorManfred Rubruck
Life of this patent
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Abstract
A control arrangement for a roll carrier in which the speed control is continuously optimized by a computer taking into account the moment of inertia of the roll. The computer responds to an initial value of the moment of inertia which is determined during acceleration of a new roll and from the instantaneous radius of the winding, providing a signal for regulating the gain of a speed controller connected to the drive for a roll on the carrier.
Claims5
In a control arrangement for rotating a roll held in a carrier and supplying a web under predetermined web tension, the roll being coupled to an electric driving and braking machine and the machine being coupled to a speed controller responding to optimized control valves continuously determined from system parameters, the improvement comprising:
- means for generating a signal representing an initial value of the moment of inertia of a new roll during start-up of the new roll;
- means for generating a signal representing the instantaneous radius of the roll at the point of unwinding of the web;
- and
- means responsive to said signals for regulating at least one of the optimized control gain and the optimized integral-action time of the speed controller.
A control arrangement for a roll carrier having a motor directly coupled to a roll for timing it synchronous speed, comprising a circuit for determining the initial value of the moment of inertia of a roll on the carrier, the circuit having as inputs measure values for the synchronous speed of the roll, the time required for the roll to each synchronous speed, the driving torque of the drive motor and predetermined value for the moment of inertia of the drive.
Dependencies are inferred from the claim text.