Mercerizing Process Speed Control System Optimal Control System

This thesis is based on the speed regulation system of the LMH201A-160 Mercerizing Machine in Qunkang Printing and Dyeing Company. LMH201A-160 Mercerizing Machine is widely used in textile & printing and dyeing industry. It is drived and controlled by FKZ-ⅡSilicon Controlled Direct Current Speed Regulation System. Due to the many deficiencies of this System(high maintenance rate, low reliability, low agility, slow responding speed, high electricity pollution, long malfunction time, and lack of self-inspection function), the operation of this product line was severely influenced. This thesis introduces the indirect current Variable-frequency speed regulation System based on PLC, and apply it to the better capable LMH231-180 Clipless Machine, thus resulted in a new-generation mercerizing weaving and dyeing system.In this system, in order to actualize the full use of power and to meet the requirements of manufacturing, we need to regulate the rotation speed of electronic machine. And taking account of the start up, operation, regulating and trigging of electronic machine, the functional v/f controlled currency inverter AnchuanVS-616G5 inverter is needed. In this system, the data acquisition, the control of inverter and electronic machine are accomplished by Sanlin FX_2N PLC programming software, GX Developer7.0 adopts the modularized programming method and the mass use of code repetition which reduces the development and maintenance of the software.Firstly, this thesis introduces the technology requirements of speed regulation system, introduces the research task and the chief content of the thesis. In chapter 2, introduces the development and current situation of electromotor regulating technology, discusses the schemes of the indirect Current Variable-frequency regulation system of the Mercering machine. In chapter 3, the frequency conversion principle of variable-frequency asynchronous electronic machine and the microcomputer algorithm of Sine Pulse Width Modulation(SPWM)were introduced. In chapter 4, it mainly introduces the basic composition and function of different Programmable Logic Controller (PLC), and also the operation principle of PLC. The system, manufacturing flow, the electric structure of the system, hardware collocation and software actualization are introduced in details in chapter 5. In chapter 6, the debugging, running process and analysis of the system are simply introduced. Finally, the whole thesis is simply summarized, and makes prospects of the development of the indirect current speed regulation sysrem.