Application of Sunwoele VFD (Variable-frequency Drive) on power pay-off frame
Abstract: This article introduces some advantages of Sunwoele HSF600 in the cable industry, as well as solutions for power payoff racks.
1 Introduction
The cable industry is currently developing towards higher technical levels such as product diversification and production automation. In the cable industry, the most widely used pay-off stand is the pay-off stand, and the power pay-off stand is a piece of equipment with high technical content. Power pay-off stands generally require that the VFD (Variable-frequency Drive) contains the function of PID adjustment, and the PID can be controlled in both directions.
Sunwoele HSF600 is currently the only Chinese-made VFD (Variable-frequency Drive) with this function. Its excellent vector control performance and good reliability ensure the superiority of Sunwoele VFD (Variable-frequency Drive) in the cable industry. Performance.
2. Process introduction
As the front end of a variety of equipment, the power pay-off stand is widely used in the cable industry. Generally speaking, the requirements for power pay-off stands are as follows:
a When the extraction speed is accelerated, the pay-off speed also accelerates rapidly with the extraction speed;
b When the take-up speed slows down, the pay-off speed also slows down along with the take-up speed;
c When running stably at a certain speed, the swing rod of the pay-off frame must be stable;
d. When loose thread or broken thread occurs, the pay-off reel is required to be able to automatically reverse.
The above points all require the PID function of VFD (Variable-frequency Drive) to be completed, and the VFD (Variable-frequency Drive) must be very sensitive to the speed response.
3. Control plan
HSF600 series VFD (Variable-frequency Drive) is a new generation of modular high-performance VFD (Variable-frequency Drive) launched by Sunwoele Technology that represents the future development direction of VFD (Variable-frequency Drive). Compared with VFD (Variable-frequency Drive) in the traditional sense, in terms of meeting customers' different performance and functional needs, it is not realized through multiple series of products (thus increasing additional manufacturing, sales, use, and maintenance costs), but It is a modular design based on the reasonable segmentation of customer needs, and creates a customized platform through the combination of multiple modules of a single series of products.
HSF600 VFD (Variable-frequency Drive) is flexible and diverse in the combination of frequency sources. The main and auxiliary frequency sources can be selected from 10 types respectively, and frequency switching modes such as main/auxiliary, main/main+auxiliary, main+auxiliary, etc. can also be realized.
In view of the VFD (Variable-frequency Drive) requirements of the power pay-off frame, Sunwoele HSF600 can achieve bidirectional forward and reverse PID when the frequency source is selected as main + auxiliary, the main frequency is 0, and the auxiliary frequency is PID. control. The specific wiring diagram and main parameters are as follows:
VFD (Variable-frequency Drive) adopts an open-loop vector control method. The main given comes from AI1, AI1 and GND are short-circuited (the main given is 0), and the auxiliary given comes from PID, so that the two-way effect of PID can be realized. The acceleration and deceleration time is 0.1s.
4. Debugging
Sunwoele HSF600 is very convenient in terms of wiring and debugging. Issues that should be paid attention to during debugging:
a After selecting vector control, be sure to perform tuning operations first so that the VFD (Variable-frequency Drive) can automatically identify the equivalent parameters of the motor, so that the control of the VFD (Variable-frequency Drive) can be more accurate and faster;
b. The action direction of PID must be selected as reaction. This is a positive feedback system;
c Since the power pay-off frame has a brake device, please select free stop as the stopping method;
d. The key to debugging is to find the point where the pendulum works stably, and then define the position of this point as the PID given;
In addition, Sunwoele HSF600 also has two sets of PID parameters to choose from, which can be switched through digital input terminals. Users can switch parameters when changing disks, which is simple and convenient.
5 Conclusion
In practical applications, Sunwoele HSF600 VFD (Variable-frequency Drive) is very responsive to speed and performs very well in fast speed tracking and loose line reverse take-up, fully meeting customer needs.