A foil machine winding tension control system and control method

Abstract

The invention discloses a winding tension control system of a raw foil machine, which includes a winding device for winding raw foil and measuring the actual winding tension and actual winding speed, and a controller. The controller includes: a tension comparison unit, It is used to calculate the difference between the actual winding tension and the tension preset value to obtain the tension difference; the parameter update unit calculates the tension adjustment parameter and the speed adjustment parameter according to the tension difference; the tension control unit calculates the tension adjustment parameter according to the tension difference and the tension difference Adjust the parameters and calculate the speed reference value of the winding device; the speed comparison unit is used to calculate the difference between the speed reference value and the actual winding speed to obtain the speed difference; the speed control unit is adjusted according to the speed difference and the speed adjustment parameter The winding speed of the winding device; the present invention combines the parameter update module with the PID controller, so that the PID parameters can be adaptively changed with the change of the system working conditions, and achieve the best control effect.

Description

technical field [0001] The invention relates to the technical field of lithium battery copper foil, in particular to a winding tension control system and control method of a foil machine. Background technique [0002] In the copper foil production process, in order to achieve good performance indicators such as copper foil thickness uniformity, elongation, and elongation, the main control parameter is the winding speed, and its essence is to realize the tension between the copper foil strips through the control of the winding speed. Control, if the tension is unstable, the copper foil may have serious quality problems such as edge tearing, wrinkles, and uneven thickness, which will affect production efficiency and product quality. Therefore, copper foil tension control is an important technology in copper foil production. [0003] In the prior art, the tension of the copper foil is mainly controlled by tension open-loop torque, which directly gives the motor a brutal speed t...

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Problems solved by technology

[0003] In the prior art, the tension of the copper foil is mainly controlled by tension open-loop torque, which directly gives the motor a brutal speed to saturate the speed loop of the motor, and then limits the output torque of the motor by limiting the amplitude limit of the current loop, but due to the lack of tension Feedback, there is often a large deviation between the actual tension value and the expected tension value, and the tension steady-state performance is poor; the more advanced existing technology center adopts tension closed-loop torque control, which is equipped with a tension sensor and realized through a PI regulator The tension is constant, but because its PI parameter is fixed, the system adaptability is not good. In the case of different machine speeds, different copper foil thicknesses and different winding diameters, the tension control effect is different, and the accuracy requirements cannot be met.

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