Control Application of Frequency Converter on Slitter

Date:2022-10-10    Visitors:0    Author:admin
In recent years, China's paper industry and printing and packaging industry have achieved rapid development, facing unprecedented opportunities, but compared with the world's advanced equipment, it also faces enormous challenges. The production capacity of the production equipment is very strong, but our products are basically in the low-end market. The main reason is the limitation of technical conditions. Up to now, a large number of slitters still use magnetic powder brakes to control the winding tension, which limits the running speed of the equipment and wastes energy. Moreover, due to the service life of the magnetic powder itself, the failure rate is high.

Automatic slitting machine slitting machine is a kind of mechanical equipment that splits wide paper or film into multiple narrow materials, commonly used in paper making machinery and printing and packaging machinery.
The traditional control scheme of the slitter is to use a large motor to drive the winding shaft. A magnetic particle clutch is added to the winding shaft. The resistance generated by the magnetic particle clutch is controlled by adjusting the current of the magnetic particle clutch to control the tension on the material surface.
The traditional control scheme of the slitter is to use a large motor to drive the winding shaft. A magnetic particle clutch is added to the winding shaft. The resistance generated by the magnetic particle clutch is controlled by adjusting the current of the magnetic particle clutch to control the tension on the material surface. Magnetic particle clutch and brake is a special automatic actuator. It transmits torque through magnetic particles filled in the working gap, changes the excitation current, thus changing the magnetic state of magnetic particles, and then regulates the transmitted torque. It can be used for stepless speed regulation from zero to synchronous speed, and is suitable for fine adjustment in high speed section and speed regulation system with small and medium power. It is also used for unwinding or rewinding tension control system to adjust torque by adjusting current to ensure constant tension during winding.

Its main feature is that the magnetic particle clutch, as a resistance device, outputs a DC voltage through system control to control the resistance generated by the magnetic particle clutch. The main advantage is that its passive device can control small tension. Its main disadvantage is that the speed can not be too high, and it is easy to cause high-speed friction of magnetic particles during high-speed operation, resulting in high temperature, which will cause the magnetic particle clutch to heat up and shorten its life.