Double frequency wire drawing machine transformation plan

Foreword:

Drawing machine industry, the type of equipment involved is very large, the common drawing machine is a water tank type drawing machine, straight type drawing machine, pulley type drawing machine, inverted drawing machine, drawing machine is mainly used in the copper wire, stainless steel wire The processing of metal wire materials is an extremely important processing equipment in the cable manufacturing industry. With the constant development of frequency control technology, frequency converters have been widely used in the drawing machine industry, and they are responsible for wire drawing speed control, tension winding, and multi-stage synchronous control. The application of frequency converters has greatly improved the drawing machine. The level of automation and processing capabilities, effectively reducing the unit's energy consumption and maintenance costs, has been widely recognized by the industry.

The picture above shows a simple drawing of a small wire drawing machine. From the mechanical point of view, it can be decomposed into a drawing part and a take-up part. From the electrical control, it can be decomposed into a constant tension synchronous control of the drawing stepless speed control and take-up, through the tension pendulum. The position of the rod changes, feedback control system, after the automatic calculation, change the winding motor operating speed, so as to achieve the constant tension and speed synchronization of winding and drawing two links, and through the wire guide wheel motor, can be with the take-up With different speeds, the finished metal wire is evenly wound around the take-up reel so that the metal material can be stretched.

Industry Status:

The status quo of the industry, this material is limited to the electrical control part of the statement, readers understand!

The control mode of the small wire drawing machine shown in the figure above is the current mainstream control method. The stretching and take-up control is completed by the PLC or the IPC of the IPC. The inverter receives the PLC or IPC instructions and realizes the stepless stretching. Constant tension control for speed regulation and take-up. This system solution will directly lead to high costs, complex systems, difficult maintenance, high maintenance costs and poor system control response.

INVT recommended program:

The above schematic diagram is the control method recommended by INVT. The two types of medium, small, and miniature wire drawing machine electrical control methods integrate the functions of synchronization and tension control, system startup and shutdown control, and fault alarming of the winding inside the inverter. , Integrate with the mechanical system, the external signal is directly sent to the inverter, the internal algorithm quickly responds to the direct control of the system, greatly improving the system's response speed, eliminating the PLC, HMI, IPC, saving system cost, reduce Fault point, and can be configured according to user needs LED or LCD operating panel, reflecting the humane operation of the human machine, user-friendly operation, maintenance, commissioning and use.

Product introduction: INVT-CHV130 special inverter

The INVT-CHV130 special-purpose inverter is based on the hardware platform and core control algorithm of the INVT-CHV100 high-performance vector inverter, combined with the requirements of dual-conversion medium, small and miniature wire drawing machines, and developed a special double Inverter of frequency conversion control drawing machine, in order to meet the requirements of industrial applications, has done a lot of special treatment in hardware, software algorithms, structure, especially for high temperature, anti metal dust, anti-humid, anti-corrosion treatment, greatly enhanced Frequency converter in the wire drawing machine industry reliability.

1. Current vector control INVT-CHV130 dedicated inverter uses ARM (32-bit) + DSP (16-bit) dual CPU control system. The function control and performance control are completely separated. The underlying high-performance motor control module adopts the current vector control algorithm. The stator current is decomposed into the excitation current component and the torque current component according to the coordinate change, and respectively controlled, thereby realizing the high-precision control of the torque.

Advantages of vector control compared to V/F control (1) Excellent low-frequency torque characteristics (2) Good dynamic response characteristics, rapid response to load changes (3) High speed control accuracy, enabling high-precision synchronous control (4 ) Direct torque control possible, high precision with no PG feedback torque control, low cost tension control

2, the main technology
â—† Output frequency range: 0.00 ~ 600.00Hz;
◆ Speed ​​control mode: SVC, VC, V/F control, torque control;
â—† Command channel mode: operation panel, terminal control, remote communication control;
â—†Frequency given mode: digital keypad given, analog given (current, voltage signal), pulse frequency given, remote communication given, PID closed-loop given. It can realize the mutual switching between a given combination and a given method to facilitate the requirements of on-site debugging and complex processes;
â—† Large starting torque: 0.5Hz/150% (SVC), 0Hz/180% (VC);
â—† overload capacity: 150% rated current 60s; 180% rated current 10s;
◆ Speed ​​ratio: SVC: 1:100, VC: 1:1000;
â—† Carrier frequency range: 1.0K ~ 16.0KHz; can be automatically adjusted according to temperature and load characteristics;
◆ Speed ​​control accuracy: ±0.5% maximum speed (SVC); ±0.1% maximum speed (VC);
â—† Automatic Voltage Adjustment (AVR): When the voltage of the grid changes, it can automatically maintain the output voltage constant;
â—†Torque control: A variety of torque command setting methods can realize torque control with PG and without PG;
â—† High-speed pulse input function: It can realize fixed-length control;
â—† Stop processing: stop brake brake output function;
â—† Broken wire fault detection function: Provides digital signal detection and analog signal detection methods;
â—† Provide two sets of PID parameters: PID control can be automatically adjusted according to line speed, radius, and operating frequency;
â—†Display function: It can display drawing length, drawing line speed, and display range;
â—† fixed-length automatic parking: fixed-length automatic parking function;
â—† Design PID regulation limiting function: to achieve a smooth start and stop of the synchronous control system;
â—† Synchronous gain: facilitates debugging of synchronous control;
â—† Configure roll diameter calculation function: to achieve high-precision tension coiling control;
â—† Roll diameter reset function: It can realize the reduction of the coil diameter of the I-turn wheel through the terminal;
â—† Cable motor control function: with FDT frequency detection
3, peripheral configuration â—† programmable digital input: 6 input, 1 of which can be used for high-speed pulse input (HDI1), I / O card can be expanded 4 input;
â—†Programmable analog input: AI1: 0~10V input, AI2: 0~10V or 0~20mA input, expansion card can expand 2 input (AI3: -10V~10V input, AI4:0~10V or 0~20mA enter);
â—† programmable open collector output: 1 output, expansion card can expand 1 output (open collector output or high-speed pulse output);
â—† Relay output: 2 outputs, expansion card can expand 1 output;
â—† Analog output: 1 output, expansion card can be extended 1 way (0/4 ~ 20mA or 0/2 ~ 10V);
â—† Provide two kinds of control power supply: +24V, COM; +10V, GND;

4. Reliability Design 1) Full range of independent air duct design â—† Full range of independent air ducts â—† Radiator is installed in the cabinet body and outside the cabinet, fan replacement is convenient, inverter maintenance is simple â—† The inverter is greatly improved in drawing Reliability of long-term operation under different application environments in other industries 2) Design of wide power grid voltage â—† The input voltage of the power grid is between -15% and 15%, the inverter can be operated safely, and the user does not need any other processing. 3) DC reactor with a standard of 18.5KW to 90KW â—† Increase the input side power factor â—† Improve the overall efficiency and thermal stability â—† Effectively eliminate the influence of the higher harmonics of the input side on the inverter and reduce the interference to the periphery 4) The safety self-test function â—† The inverter is powered on, the system Complete hardware and software self-tests â—† The system securely modifies and modifies the function parameters to prevent users from incorrectly setting the function parameters. 5) Superior protection functions â—† Provides up to 20 kinds of protection functions. To achieve full protection of the inverter, motor, and peripheral equipment â—† To provide automatic fault reset function to facilitate the automatic elimination of conventional faults â—† Built-in lightning overcurrent protection Protecting devices, effectively improving the self-protection function for inductive lightning 6) Standard manufacturing platform â—† Anti-static, anti-corrosion and anti-metal dust three-proof paint treatment process â—† Professional water production line â—† Strict production management system