Tension control method, device and system for winding and unwinding equipment

Abstract

The invention discloses a tension control method, device and system of rolling and unrolling equipment. The tension control method comprises the steps of obtaining the current linear velocity V<n> of operation of a material and the current frequency f<n> of a motor rotor; calculating out the current rolling diameter calculated value D<n> of the outer diameter of the material on a roller wheel every other time cycle T according to the obtained current linear velocity V<n> and the current frequency f<n> of the motor rotor; comparing the current rolling diameter calculated value D<n> with a predetermined limiting condition, and determining the current rolling diameter determined value; according to the current rolling diameter determined value, controlling a motor to output a corresponding force moment. According to the tension control method, device and system of the rolling and unrolling equipment, due to the fact that a tension controller calculates out the current rolling diameter calculated value by obtaining the material operation linear velocity, then conducts error judgment on the current rolling diameter calculated value obtained through calculation, conducts judgment by comparing the current rolling diameter calculated value with the limiting condition and finally controls a frequency converter to output the corresponding force moment according to the current rolling diameter determined value obtained through calculation and judgment, the material on the roller wheel can obtain constant tensile force all the time, the material can be rolled and unrolled more stably, and the rolling and unrolling effect is better.

Description

technical field

[0001] The invention relates to the technical field of tension control, in particular to a tension control method, device and system for winding and unwinding equipment. Background technique

[0002] In the case of tension control rewinding and unwinding where the diameter of the reel varies widely, in order to achieve constant tension control on the material surface and improve the forming effect of the material on the rewinding and unwinding side, it is necessary to know the diameter of the material on the rewinding and unwinding reel in real time. Among the existing roll diameter calculation methods, there is a method of directly measuring the roll diameter, and there is also a method of calculating the roll diameter according to the thickness of the material and the number of turns of the material on the rewinding and unwinding shaft. The cost increases, and there are errors in the measurement. However, it is difficult to accurately measure the thickness ...

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