Dissertation > Industrial Technology > General industrial technology > Industrial common technology and equipment > Thin-film technology

The Research about the Synchronous Control for the Traction and Rolling of the Plastic Film

Author LiuTing
Tutor DaiZuoZuo
School Beijing University of Chemical Technology
Course Mechanical Design and Theory
Keywords Constant linear velocity Constant tension Inverter PLC Communicate
Type Master's thesis
Year 2003
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Film winding quality control is to determine the value of the key in the final film , the the film traction and winding synchronous control objective of the study is to control the speed and tension of the traction and the winding process of the line , so to maintain constant, in order to ensure that the film does not produce tensile stretch and tension phenomenon . Determine the traction motor load is constant torque load , take-up motor load , constant power load analysis in the process of coiling process and flip traction motor winding motor speed control law , determine the the film traction and coiling constant line speed , constant tension synchronization control scheme . Selection vector control VVVF methods . The instance main circuit control system software design , hardware design of the control loop and control loop . Traction motor with constant torque speed , winding motor adopts constant power speed . Given values ??were calculated traction motor and the take-up speed of the motor based on the line speed setting ; measured by high-speed encoder pulse is sent to the PLC high-speed counter oral traction motor speed and take-up motor speed is calculated by the PLC SPD instruction , calculated in real time the diameter of the film roll , traction motor rotational speed multiplied by the transmission ratio of the two motors , and compared with the take - up motor speed , the difference between the winding motor given the compensation of the rotational speed feedback value , the set value and compensation feedback value to the analog input and built - in PI regulator inverter . Thus completing the closed-loop control of the speed . PID function using FX 2N instructions tension PI control . The personal computer to the host computer, PLC for the next crew situ monitoring and remote monitoring of the PLC through the the the special package FX-PCS/WIN-C and the SC-10 type cables .

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