The System Design Of Variable Frequency Speed Regulation For Polyethylene Insulated Cable Wrapping Production Line

With the national pace of reform forward, deepening the science and technology system is also accompanied by the spring breeze of reform in the field of science and technology industrial deepening. In China polyethylene insulated cable sheath production line area on how to conduct a reasonable regulation of the production process, in order to better improve production efficiency and product quality has become a serious problem faced by the industry.Aim at the Yulin College "polyethylene insulated wire wrapping production line" motor speed control system, PLC as a controller, a three-phase induction motor speed control system of auto-tuning is designed. Three-phase AC motor working principle analysis of asynchronous motor torque or speed characteristics and load torque characteristics, flux constant torque or speed characteristics, the stator voltage constant torque or speed characteristics were compared, and the impact of volume The main factor in the quality of the line were analyzed to determine the use of PLC to reel machine control solutions. In the structure of the control system hardware design of the system while increasing the main circuit, overvoltage, undervoltage, overload, overheating, optical encoder feedback disconnection, brake abnormal protection. By hardware and software with which the fault signal detection, signal appears once protection is issued immediately blocked PWM drive signal through software control logic. A self-tuning PID control algorithm is designed for the main motor winding machine for real-time control. The experimental test verification, and the effect of the conventional PID control comparison, self-tuning PID controller parameters determined by the way, the performance of the control system itself has been greatly improved, and the system operation is safe, reliable, accurate.Coiler system using S7-200(small programmable controllers), through the design of software programmed to realize that the speed of the motor speed regulator, so that it can follow slow, medium and fast operation state; when the production line When produced wire peeling, or protective sleeve covering incomplete cases, will be on the production line motor deceleration adjustment; when the monofilament annealing and similar production processes, appearing as a result of motor speed is too slow and caused wire jacket over thick, when pro package or plastic extrusion and other types of damage problem, we adjust the motor speed is accelerated; this is sufficient to satisfy the needs of the actual production process, and thus achieve the purpose of this design.