Design And Implementation Of Automatic Control System Nitrogen-protected Push Type Kiln

Based on the characteristics of sintering positive material of Li-ion battery andprocess parameter, it is proposed in the article that nitrogen-protected push type kiln iscontrolled by using programmable logic controller(PLC) and computer controllingsystem under the combination of the necessary low voltage devices. The system ismainly composed of temperature control system, belt driving system, atmospherecontrolling system and computer monitoring system.The temperature control system of nitrogen-protected push type kiln is dividedinto several closed control loops each of which controls an individual temperaturezone. Thermocouple turns temperature into mili-voltage signal and sent it tointelligent temperature controller. By PID calculation method, and comparing all thecollected data, the temperature controller outputs the mili-ampere to controlpower-adjusted circuit. Finally the power adjusting circuit then uses output signal'svolume to adjust the power of the heating element by adjusting the volume ofcontrollable silicon's opening angle, thus achieving the desired of temperature control.PLC is adopted in driving circulation system and atmosphere control system,which is more stable and convenient to control. As the functionality of PLC increases,all industries in the world now attend to apply it into controlling system. In this article,the system adopts PLC as core controlling, together with low voltage device,controlling motor and magnetic valve open and closed to achieve the drivingcirculation motion and atmosphere protection function.Computer monitor system uses distribution-controlling system, communicationbetween PC and MC is carried out by serial port, PC is industry control computer,which is called for short, and MC includes temperature controller, PLC, inverter and other controlling modules.At the end of the paper, the author points that automatic control system shall bean integrated system combining techniques, control function, management functionand data processing function. It also puts forward better suggestion on it. The localcirculation shows that the system is steady and it achieves design requirement.