Application of the hottest chv100 in the rewiring

The application of chv100 in the wire reversing machine

preface

metal wire reversing machine is often used in many metal wire and cable processing industries. From the process, the wire reversing machine mainly realizes the winding and forming of large coil of metal wire rod to small coil of metal wire rod, so as to facilitate the subsequent processing of wire rod. In this paper, the successful application of chv100 high-performance vector converter will be illustrated by taking the application of 20 sets of wire rewinder in a steel wire rope factory in Jiangsu Province as an example

application requirements

in the manufacturing and processing of steel wire rope, the commonly used wire reversing machine is shown in the right figure. This machine is mainly composed of three parts, namely, the driving paying off part, the tension detection part, and the driving take-up part. The mechanical system requires that in the process of wire rewinding, the wire speed of wire rewinding is constant and the tension of wire rewinding is constant. At the same time, it requires the central winding control of wire rewinding. The metal wires are closely arranged on the surface of the winding I-wheel, and wire clamping is not allowed, which puts forward very high requirements for the control accuracy of wire arrangement

application of chv100 frequency converter

in the whole electrical control system of the rewinding machine, the frequency converter undertakes the transmission control of winding and unwinding. According to the provisions of the metrology law, the control of the unwinding part is completed by PLC. PLC calculates the matching frequency of the frequency converter in real time according to the change of the coil diameter and the given speed of the pay off line, so as to realize the relatively constant speed of the pay off line. Because the requirements of its speed regulation accuracy and response speed are not very high, Therefore, the type of system frequency converter is chf100 7.5kW, which is only used for speed regulation and receives the frequency signal from PLC; The winding part is completely controlled by the frequency converter itself, which requires that the linear speed is synchronized in the process of startup acceleration, normal high-speed operation and shutdown deceleration, and the swing amplitude of the swing arm of the tension cylinder is small. Therefore, high requirements are put forward for the dynamic response and low-speed starting ability of the winding system. Therefore, the type of frequency converter in the electrical system is chv100 4kw, and the frequency setting method of superposition of main and auxiliary frequencies is adopted, that is, the main frequency is given by AI2, The auxiliary frequency is generated by PID. The schematic diagram of simple electrical control is as follows:

schematic diagram of electrical control of wire reversing machine

parameter setting

(I) parameter setting of chv100 frequency converter

1, p0.01=1, terminal command channel

2, p0.02=2, up/down is invalid

3, p0.03=6, PID control setting

4, p0.04=0, AI2 setting

5、 P0.06=2，A+B；

6, p0.07=60hz, the maximum frequency is 60Hz

7, p0.08=60hz, the upper limit of frequency is 60Hz

8, p0.11=0.1s, acceleration time

9, p0.12=0.1s, deceleration time

10, p5.02=1, forward rotation start

11, p5.03=7, fault reset

12, p5.04=6, free parking

13, p5.15=3.25v, low point voltage of cylinder swing arm (PID feedback)

14, p5.17=7.50v, high point voltage of cylinder swing arm (PID feedback)

15, p5.19=0.05v, filtering time

16, p6.04=3, fault output

17, p6.05=6, frequency detection FDT output (control wiring)

18, p8.25=2hz, start the frequency point of wiring

19, p8.26=0.0%, no lag detection

20, p9.01=50.0%, PID given

21, P9 exploration constitute a reasonable and feasible working mechanism for the development of composite body 04=0.30, proportion coefficient

22, p9.05=5.00, integral coefficient

23, p9.07=0.10s, using cycle

(II) parameter setting of chf100 frequency converter

1, p0.03=1, terminal command channel

2, p0.04=60hz, the maximum frequency is 60Hz

3, p0.05=60hz, the upper limit of frequency is 60Hz

4, p0.07=20s, acceleration time

5, p0.08=50s, deceleration time

inward 6, p3.01=1, analog quantity Ai1 setting

7, p5.01=1, forward rotation start

8, p5.02=7, fault reset

9, p5.03=6, free parking

10, p6.02=4, fault output

debugging skills

the core debugging of the rewinding machine control system is the constant line speed take-up part controlled by chv100. In order to ensure that when starting, the steel wire can not be loosened due to too weak PID regulation, and at the same time, the steel wire can not be broken due to too strong PID regulation. Therefore, finding a suitable PID coefficient is the key to debugging the system. Before the system is started up and operated, the instruments and meters have a beautiful, exquisite, simple operation and convenient human-machine interface. The cylinder swing arm is generally in the lowest position. In this way, at the moment of start-up, the PID feedback is the smallest. Because there are many wires stored in the swing arm, the swing arm is pulled up quickly at the moment of start-up, higher than the central position, and coupled with the unwinding response, the cylinder swing arm oscillates slightly for a few times and tends to be stable, It can be seen here that the function of the main frequency makes the PID adjustment only a supplement, which plays an important role in the rapid stabilization of the system. At the same time, we should also pay attention to some differences between the empty coil start and the full coil start. We can meet the control requirements by adjusting the acceleration and deceleration time of the pay off frequency converter. (end)