1 Introduction
The cable industry is currently developing towards higher technological levels, such as production automation and simplification of mechanical transmission equipment. Among the cable industry applications, powered cable reeling frames are the most widely used, and these frames are mechanical devices that require high-performance inverter control. Powered cable reeling frames typically utilize PID bidirectional regulation, which necessitates that the inverter have built-in PID functionality and be capable of bidirectional control.
The built-in PID function of the HIPMON HD20 can well meet the above requirements, and its excellent vector control performance, high stability and reliability ensure the outstanding performance of HIPMON frequency converters in the cable industry.
2. Technical requirements for powered wire feeding frame
As an important piece of equipment in the cable industry, powered cable delivery frames are generally required to meet the following requirements:
a. The analog signal has high accuracy and can accurately detect the feedback signal from the lever position sensor;
b . The PID control is fast and can quickly respond to changes in the wire feeding speed, preventing the wire feeding from being too fast or too slow .
c . High speed stability, which can maintain a stable wire feeding speed and reduce cable tension fluctuations ;
d . PID can be adjusted in both directions to take in or release the wire according to the actual situation;
3 Application Cases of HD20 in Power Cable Laying Stands
The equipment used in this application was a chemical foaming extruder, and the cable was made of 3mm diameter copper wire. Because copper wire is thin and easily broken, the requirements for wire feeding control are very high. The debugging process and results are as follows:
3.1 Field Wiring
The inverter command channel is terminal-based; the rocker arm position sensor outputs a 0-10V signal, which serves as the PID feedback signal; the PID setpoint is digitally configured, and the specific wiring diagram is shown below:
3.2 Debugging Precautions
(1) Since the low-frequency torque and speed stability of vector control are better than those of V/f control, vector control is the best choice for power wire laying frame.
(2) Since the vector control process requires accurate acquisition of motor parameters, it is necessary to accurately input the motor nameplate value and perform motor parameter self-tuning.
(3) Since the position of the pendulum when it is in equilibrium is determined, the corresponding feedback signal is also determined. All PID input channels are set to digital input.
3.3 On-site commissioning
(1) Wiring according to Figure 2;
(2) To obtain better motor drive performance, the motor parameters need to be set according to the motor nameplate, and then F00.01 is set to 2, that is, the speed control mode is selected as vector control without PG, and finally the parameters are self-tuned;
(3) Set the maximum frequency and upper limit frequency according to the actual transmission relationship on site;
(4) Set the command to specify the channel and frequency for the channel;
(5) Set acceleration and deceleration time;
(6) Configure analog quantity function;
(7) Set terminal functions;
(8) Enable the PID function and adjust the PID parameters appropriately according to the field performance;
(9) Final parameter settings are shown in the table below.
Function code | illustrate | Settings and Explanations |
|---|---|---|
F00.01 | Speed control method selection | 2 (Open-loop vector control) |
F00.06 | Maximum output frequency of frequency converter | 70.00Hz |
F00.08 | Maximum operating frequency | 70.00Hz |
F00.11 | Command settings for channel selection | 1 (Terminal command given) |
F03.01 | Acceleration time | 0.1s (acceleration time refers to the time from zero frequency to maximum frequency) |
F03.02 | deceleration time | 0.1s (Deceleration time refers to the time from maximum frequency to zero frequency) |
F04.00 | Process PID control selection | 1 (PID control is effective) |
F04.01 | Given channel selection | 0 (given number) |
F04.02 | Feedback Channel Selection | 0 (AI analog feedback) |
F04.03 | Given a numerical setting | 8.00v |
F04.04 | Proportional gain (P) | 1.00 |
F04.05 | Integration time (I) | 7.5 |
F04.09 | Sampling period (T) | 0.01 |
F04.13 | PID controller upper limit | 70.00Hz |
F04.16 | Integral term adjustment selection | 1 (Continue accumulating points when the maximum points are reached) |
F04.18 | PID output inversion selection | 1 (PID control allows reverse rotation) |
F04.19 | PID output inversion frequency upper limit | 70.00Hz |
F15.00 | DI1 terminal function selection | 2 (FWD function) |
F15.20 | RLY1 Relay Function Selection | 31 (Inverter failure) |
F16.01 | Analog AI1 Function Selection | 5 (Closed-loop feedback of the process) |
3.4 Debugging Results
On-site tests were conducted on low-speed, accelerated, high-speed, and decelerated cable laying processes. During acceleration and deceleration, the swing arm exhibited slight fluctuations. However, during constant speed processes (including both high and low speeds), the swing arm remained in a balanced position. Throughout the entire cable laying process, the cable tension remained constant and uniform, receiving unanimous praise from the customer.
4. Conclusion
The HD20 vector control frequency converter has been successfully applied in the field of power cable reeling. Its superior performance (fast-response PID function, wide speed range, high steady-state accuracy, fast acceleration and deceleration, flexible and convenient operation, and comprehensive function protection) and high reliability have been fully verified, and it fully meets the needs of power cable reeling.
