Technical characteristics of frequency control in ribbon weaving loom
1. Soft start
When the motor is directly started by the power frequency, it will produce 7-8 times the rated current of the motor. This current value will greatly increase the electrical stress of the motor windings and generate heat, thus reducing motor life. The variable frequency speed control can be started at zero speed and zero voltage (of course, give proper torque boost). Once the relationship between frequency and voltage is established, the frequency converter can drive the load to work in accordance with V, F or vector control. The use of variable frequency speed regulation can fully reduce the starting current, improve the bearing capacity of the winding and reduce the maintenance cost of the motor.
2. Step-less speed regulation
In the spinning process flow, the electrical rotation of the processing equipment is required to be stable, and the jogging, starting, and lifting speeds should all be smoothly achieved so that the draft of the fiber can be even and the weight unevenness can be reduced. In the spinning system of textile machinery equipment, it is carried by belts and gears. Due to the hardness of the motor starting, belt slippage, gear impact, etc. are inevitable during the jogging and starting. In mechanical transmissions, the more gears there are, the greater the chance of damage to the gears. Application of AC frequency conversion technology can achieve a smooth start well, eliminate the impact of mechanical start-up, achieve step-less speed regulation, meet the process requirements, improve production efficiency and yarn quality, reduce operating costs. When this kind of technology is applied, the yarn change of the yarn type can be changed without changing the pulley. The change of the process speed of the equipment can be accomplished only by setting the frequency conversion.
3. Optimize the process
The use of variable frequency speed regulation can optimize the process, and can be quickly changed according to the process, but also through the remote PLC or other controller to achieve speed changes. Just like the controlled acceleration, in the variable frequency speed regulation, the stop mode can be controlled, and different stop modes can be selected, thereby making the entire system more stable.