The Research Of The Constant Tension Control System Based On The AC Motor Speed Control

In recent years, with the performance of Power Electronics devices continued to consummate and the AC Motor Speed Control Technology and the Frequency Speed Converter Technology development and their increasingly widespread application of the device. The Constant Tension Control System is based on Frequency Drive up and Constant Tension Control System is very important to improve the production efficiency and product quality. Equipment revenue line process can be achieved to Constant Tension Control will directly affect the quality of their products.In my paper, it introduces the basic principles of motor control and the modern AC variable speed system of basic types, also focus on the realization of the Frequency Control mode, and it describes the current situation of tension control technology and several commonly used tension sensor,in the previous section; In later chapters, it studied the revenue line process of Big Bearing of Strander, and it analyzed the basic components of the Constant Tension Control System and the control principle, and it researched the control strategy when the Motor which based on the Inverter Drive as the primary drive.The line speed difference between the two drive units formed the tension during the revenue line process. During the revenue line process the roll-diameter (D) is the friction of receive-length (L), moreover changes in line speed (V) and changes in tension (F) as well as changes in roll-diameter (D), therefore the revenue line process is a changes process. During the equipment working, you design PID closed loop control on speed and tension, well then be able to achieve constant linear speed and tension control.In the end, this paper designs a Constant Tension Control System which constitute by Programmable Logic Controller (PLC), Inverter, Human-machine Interface, Encoder, Tension Sensors. This system's characters are it including a variety of means of tension control, it adopting modular design, it holding good commonality and precise control and dynamic performance because every part relatively independent. The system has successfully passed the commissioning. Today, it has started to normal satisfactory operation. This system is not only suitable for Big Bearing of Strander revenue line equipment can also be used for other processes have rolling machines, such as Printing equipment, Paper making equipment, Textile equipment, has excellent marketing application.