light industry

I. Introduction
With the advent of the new century, China's annual added nearly 1000 million spindles of spinning production capacity, now has more than 6000 spun staple fiber spinning capacity and more than 400 million ingot long fiber spinning ability, have more than 10 home textile and garment production enterprises, is the world's largest textile country. In recent years, with an annual production of about 2 million units in the spinning machine, 5000 sets of roving machine, 10 million sets of weaving machine and corresponding with various ancillary equipment. Visible, China is also a major textile machinery manufacturing, in the new century, China will be from the textile big country to develop into a textile power. As the textile industry technology and equipment based textile machinery will show a qualitative change, from the development of the textile big country textile machinery power, will vigorously develop, and energy-saving, environmental protection, high level automation technology of textile machinery products. This is a is long and arduous task to realize the magnificent target
To enhance the level of textile machinery automation technology is one of the most important key technologies. China Textile machinery production facing more intense competition, has prompted textile machinery and textile machinery automation technology development presents the new characteristics of, such as variable frequency speed control technology, motion control technology, programming control technology and network technology has on the textile machinery popularization and application. This paper mainly introduces the application characteristics of textile machinery to frequency conversion and speed regulation technology. (the main sign of the triangle wave speed for the exposition)
Two. Triangle wave speed regulation
In order to meet the yarn winding forming no stacking line and collapse the edge and spinning winding head by the friction roller, drum transverse moving device and a bobbin chuck composition, and grooved drum transverse moving device of motor speed must be adjusted according to the triangle shown in Figure 2 wave rules, the graph is to the inverter output frequency of annotation, this control law is usually built by the inverter pendulum frequency function to regulate the output frequency is achieved.
Figure 1: F1 - Triangle upper limit frequency of F2 - triangular wave lower limit frequency T2 - triangular wave down time T1 - triangle wave rising time jump frequency (difference frequency)
From Figure 1 shows that when the inverter drive traverse the motor reaches the upper limit frequency f1 or lower frequency f2, the frequency of mutation. Decreased or increased mutation frequency and amplitude is generally about 1% of the fundamental frequency f1, mutation frequency time, theory is 0, but in fact, due to the transverse moving device and the motor inertia, making motor speed not change and transition time and transition time usually in more than 0.1s
Three parameter setting

 

Function number	Function name	Set value	Function number	Function name	Set value
E-01	Run command given channel	1	F-24	Swing up time	10
E-02	Frequency given main channel	11	F-25	Swing down time	10
E-13	Acceleration time	10	H-65	Frequency hopping (difference frequency)	3
E-14	Deceleration time	10
E-09	Maximum frequency	>F-09
E-10	Upper frequency	>F-09
F-09	Swing frequency upper limit F1	120HZ
F-10	Swing frequency lower limit F2	135HZ

 

Four, communication function
The frequency converter is connected with an open bus, and is provided with a RS485 communication port. When the field use inverter units many (such as more than 10 sets), distance, frequency converter and PLC I / O interface, large number of wiring, installation maintenance workload, cost is high, the field bus control system is reasonable, such as large polyester spinning processing combined machine etc. are used in this scheme. Therefore, the frequency converter must be articulated in the open field bus run, stop, FM and modify the number of functions; the inverter frequency, current, voltage signals and overcurrent, overclocking, owe voltage fault signal can realize the central monitoring, transducer network main control if the inverter through the serial port and PC connected with man-machine interface implementation of the inverter operation, running, condition monitoring and fault alarm, which has become a future technology development trend.
Five. Application case
The development of textile machinery, to electric drive speed performance requirements are higher and higher, more and more widespread application of inverter, in order to meet the requirements of the process at the same time and for the enterprise saves energy, reducing the energy consumption, in order to adapt to the current economical and social environment, and improve the competition of enterprise products.
Chemical Fiber Co., Ltd., Suzhou City, Jiangsu Province a, application I textile company dedicated inverter. For the transformation of the textile mill equipment, after technological transformation, process control and product qualified rate was obviously improved, production efficiency and energy use is improved, the high the considerable economic benefits.