Reconstruction scheme of double frequency wire drawing machine

There are many types of equipment involved in the wire drawing machine industry. Common wire drawing machines include water tank wire drawing machine, straight wire drawing machine, pulley wire drawing machine, inverted wire drawing machine, etc. The wire drawing machine is mainly used for copper wire and stainless steel wire. The processing of other metal cable materials is an extremely important processing equipment in the cable manufacturing industry.


With the continuous development of frequency conversion speed control technology, frequency conversion speed regulators have been widely used in the wire drawing machine industry. They are responsible for wire drawing speed control, tension winding, and multi-level synchronization control. The application of frequency converters has greatly improved the wire drawing machine. The automation level and processing capability of the machine have effectively reduced the unit energy consumption and maintenance cost of the equipment, and have been widely recognized by the industry.


The small wire drawing machine can be decomposed into the wire drawing part and the take-up part mechanically, and can be decomposed into the wire drawing stepless speed control and the constant tension synchronous control of the winding. After automatic calculation, the running speed of the coiling motor is changed, so that the two links of coiling and wire drawing reflect the constant tension and speed synchronization, and through the wire guide wheel motor, the finished product can be uniformly transferred according to the different coiling speed. The metal wire is wound on the take-up reel to realize the stretching processing of the metal material.


Industry Status:

The current situation of the industry, this material is limited to the statement of the electrical control part, please understand!

The control mode of the small drawing machine is currently the mainstream control method. The drawing and coiling control is completed by PLC or IPC. The inverter accepts PLC or IPC instructions to realize the stepless speed regulation and coiling of the drawing level. Constant tension control. This system solution will directly lead to problems such as high cost, complex system, difficult maintenance, high maintenance cost, and poor system control response.


INVT recommended program:

The control method recommended by INVT to you, these two medium-sized, small-sized and micro-sized wire drawing machine electrical control methods, integrate the winding synchronization and tension control, system start and stop control, fault alarm and other functions into the inverter, and the mechanical The system is integrated into a whole, the external signal is directly sent to the inverter, and the internal algorithm quickly reacts to the direct control of the system, which greatly improves the response speed of the system, eliminates PLC, HMI, IPC, saves system costs, and reduces failure points. It can also be equipped with LED or LCD operation panel according to user needs, which reflects the humanization of man-machine operation, and is convenient for users to operate, maintain, debug and use.


Product introduction: INVT-CHV130 special inverter

The INVT-CHV130 special inverter is based on the hardware platform and core control algorithm of the INVT-CHV100 high-performance vector inverter, combined with the control requirements of the dual-frequency medium-sized, small-sized and micro-drawing machines, and developed a special-purpose In order to meet the requirements of industry applications, the frequency converter of the frequency conversion control wire drawing machine has made many special treatments in hardware, software algorithm and structure, especially for high temperature resistance, metal dust prevention, moisture prevention, and corrosion prevention, which are greatly enhanced The reliability of the frequency converter in the wire drawing machine industry.


1. Current vector control

INVT-CHV130 special inverter adopts ARM (32-bit) + DSP (16-bit) dual CPU control system, function control and performance control are completely separated, the bottom high-performance motor control module adopts current vector control algorithm, that is, the stator current is in accordance with the coordinates The change is decomposed into the excitation current component and the torque current component, which are controlled separately to achieve high-precision torque control.

Compared with V/F control, the advantages of vector control

(1) Excellent low-frequency torque characteristics

(2) Good dynamic response characteristics, can quickly respond to load changes

(3) The speed control accuracy is high, which can realize high-precision synchronous control

(4) It can carry out direct torque control, no PG feedback torque control has high precision, and realize low-cost tension control

2. Main technology

◆ Output frequency range: 0.00~600.00Hz;

◆ Speed ​​control mode: SVC, VC, V/F control, torque control;

◆ Command channel mode: operation panel, terminal control, remote communication control;

◆ Frequency setting method: digital keyboard setting, analog setting (current, voltage signal), pulse frequency setting, remote communication setting, PID closed loop setting, etc. It can realize the given combination and the mutual switch of the given mode, which is convenient for on-site debugging and the requirements of complex processes;

◆ Large starting torque: 0.5Hz/150% (SVC), 0Hz/180% (VC);

◆ Overload capacity: 150% rated current 60s; 180% rated current 10s;

◆ Speed ​​regulation ratio: SVC:1:100, VC:1:1000;

◆ Carrier frequency range: 1.0K~16.0KHz; can be automatically adjusted according to temperature and load characteristics;

◆ Speed ​​control accuracy: ±0.5% of the maximum speed (SVC); ±0.1% of the maximum speed (VC);

◆ Automatic voltage adjustment (AVR): When the grid voltage changes, it can automatically keep the output voltage constant;

◆ Torque control: a variety of torque command setting methods can achieve torque control with and without PG;

◆ High-speed pulse input function: fixed length control can be realized;

◆ Stop processing: stop brake output function;

◆ Disconnection fault detection function: provide digital signal detection and analog signal detection methods;

◆ Provide two sets of PID parameters: PID control can be automatically adjusted according to line speed, radius and operating frequency;

◆ Display function: It can display the drawing length and drawing speed, and the display range is wide;

◆ Fixed length automatic parking: fixed length automatic parking function;

◆ Design PID adjustment limit function: realize synchronous control system to start and stop smoothly;

◆ Synchronous speed gain: convenient debugging of synchronous control;

◆ Equipped with roll diameter calculation function: realize high-precision tension winding control;

◆ Roll diameter reset function: the I-shaped wheel roll diameter reset can be realized through the terminal;

◆ Cable motor control function: with FDT frequency detection

3. Peripheral configuration

◆ Programmable digital input: 6 inputs, of which 1 can be used as high-speed pulse input (HDI1), and the I/O card can expand 4 inputs;

◆ Programmable analog input: AI1: 0~10V input, AI2: 0~10V or 0~20mA input, expansion card can expand 2 inputs (AI3: -10V~10V input, AI4: 0~10V or 0~20mA enter);

◆ Programmable open collector output: 1 output, expansion card can expand 1 output (open collector output or high-speed pulse output);

◆ Relay output: 2 outputs, expansion card can expand 1 output;

◆ Analog output: 1 output, the expansion card can expand 1 way (0/4~20mA or 0/2~10V);

◆ Provide two kinds of control power: +24V, COM; +10V, GND;

4. Reliability design

1. Full range of independent air duct design

◆ Full series of independent air ducts

◆ The radiator installation method is optional inside and outside the cabinet, the fan is easy to replace, and the inverter is easy to maintain

◆ Greatly improve the long-term reliability of the inverter in different application environments such as wire drawing

2. Wide grid voltage design

◆ The grid input voltage is between -15% and 15%, the inverter can operate safely, and the user does not need other processing

3. 18.5KW~90KW standard equipped with DC reactor

◆ Improve the power factor of the input side

◆ Improve overall efficiency and thermal stability

◆ Effectively eliminate the influence of high-order harmonics on the input side on the inverter and reduce the interference to the periphery

4. Safety self-check function

◆ When the inverter is powered on, the system performs a complete safety self-check on the software and hardware

◆ The system safely clamps the modification and setting of function parameters to prevent users from setting the function parameters by mistake

5. Super protection function

◆ Provide more than 20 kinds of protection functions, which can realize all-round protection of inverter, motor and peripheral equipment

◆ Provide automatic fault reset function to facilitate automatic elimination of routine faults

◆ Built-in lightning strike overcurrent protection device, effectively improve the self-protection function for induction lightning

6. Standard manufacturing platform

◆ Three-proof paint treatment process with anti-static, anti-corrosion and anti-metal dust

◆ Professional production line

◆ Strict production management system