Category: electromechanical technology

Below is a detailed application example based on the typical functional requirements of a film blowing machine, combined with the common wiring and parameter settings of the Yuqiang YQ3000-G11 inverter. Since a film blowing machine usually involves multiple drive lines (e.g., the main extruder motor, traction motor, winder motor, blower, etc.), this focuses on the control concepts, wiring diagrams, and parameter settings of the major sections for reference and subsequent adjustments.

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I. Main Transmission Sections of the Film Blowing Machine and the Application Approach of the Inverter

1. Main (Extruder) Motor
   • Function: Drives the screw to extrude the melt, controlling the basic output of the entire film blowing process.
   • Inverter requirements: Generally requires higher power, smooth start, and stable torque output. Vector control or torque control mode can be used for better low-speed torque and speed stability.
   • Key points: Usually requires an external speed reference (e.g., PLC/HMI for production or speed settings) or manual potentiometer for speed command.
2. Traction Motor (sometimes called the stretching motor)
   • Function: Continuously pulls the film upward from the die head, determining the stretching ratio and helping ensure uniform thickness.
   • Inverter requirements: Medium power, accurate speed control, sometimes requiring multi-speed or tension control.
   • Key points: Needs to coordinate with the main extruder speed, maintaining a stable line speed. Usually has a speed ratio with the main extruder or uses a tension sensor/dancing roller position sensor for closed-loop control.
3. Winding Motor
   • Function: Winds the formed film into rolls, potentially requiring constant tension or taper tension control.
   • Inverter requirements: Must maintain stable tension even under a wide speed range. Sometimes paired with sensors or a tension controller.
   • Key points: Depending on production line requirements, may adopt vector control with torque limit or rely on an external tension controller for speed regulation.
4. Fan/Cooling Motor (e.g., air ring, cooling blower, etc.)
   • Function: Provides stable cooling airflow for the film blowing process.
   • Inverter requirements: Relatively medium or smaller power, typically just needs constant speed or simple speed control.
   • Key points: Often uses multi-speed or simple inverter-based speed variation to adjust airflow volume.

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II. Recommended Main Hardware and Control System

1. Inverter
   • Model: Yuqiang YQ3000-G11 (select power ratings according to each motor, such as 7.5kW, 11kW, 15kW, 22kW, etc.).
   • Quantity: Depends on the number of motors that need control—commonly at least one each for the extruder, traction, and winding motors.
2. PLC and HMI (Touch Screen)
   • Suggest using a small PLC (e.g., Siemens S7-1200, Mitsubishi FX5U, or domestic brands like Xinje, Delta, etc.), plus a 7”–10” touch screen.
   • Purpose: Centralized management of line speed reference, process parameters, tension or speed ratio control. The touch screen is used for operator interface, convenient speed adjustments, alarm displays, etc.
3. Auxiliary Components
   • Potentiometer (if only manual speed control is needed and not controlled by a PLC).
   • Limit switches/proximity switches (to detect traction/tension roller positions).
   • Tension sensor/dancing roller position sensor (if tension control is required).
   • Common protection components such as contactors, circuit breakers, and thermal relays.
   • If an encoder is needed (closed-loop vector or synchronization), choose an inverter model with encoder interface and the corresponding encoder.

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III. Major Inverter Wiring Examples

Below is a detailed explanation taking the “main extruder motor” as an example. The wiring logic for traction/winder motors is similar. For multiple inverters, each will have similar main circuit wiring but will differ in how the control terminals interface with the PLC’s I/O.

1. Main Circuit Wiring Diagram

3-phase AC power (R,S,T) -----
                      |----- [Circuit breaker] -----|
                      |                             |
                      |---- [AC contactor (optional)] --|---- L1, L2, L3 ---> Inverter(YQ3000-G11) input
                      |                                                  

                      |----> Inverter(YQ3000-G11) output U, V, W ---> Main motor U, V, W

                      [PE] --------------------------> Inverter PE ----> Motor chassis ground

Note:

• For larger motors, it is advisable to add a contactor or soft starter on the input side of the inverter for protection or maintenance.
• Do not place contactors or switches between the inverter output and the motor, as this could lead to overcurrent or inverter damage.
• Proper grounding is mandatory for safety and to reduce electromagnetic interference.

2. Control Circuit (Low-Voltage Signals) Wiring Example

Below is a scenario where the PLC provides the run command and analog speed reference. If only one inverter is needed and you want manual speed control, you can connect a potentiometer to the AI terminal.

  PLC digital output Y0  ----------------> Inverter DI1 (Forward run) 
  PLC digital output Y1  ----------------> Inverter DI2 (Reverse / other user-defined function)
  PLC digital output Y2  ----------------> Inverter DI3 (multi-step speed1 / e-stop reset / etc.)
  ...
  
  PLC common COM       ------------------> Inverter DCM (digital common)

  PLC analog output AO0(0-10V)  -------> Inverter AI1 (analog speed reference)
  PLC analog ground AGND         -----> Inverter GND (analog reference ground)

  Inverter relay output(FA/FB/FC) -----> PLC digital input X0/X1 (for fault alarm/running signal)
  Inverter DO(OC/OD) -------------> PLC digital input X2 (additional programmable output if needed)

Note:

• Typical naming for digital inputs is DI1, DI2, DI3…, with DCM as the common terminal; AIx are analog inputs, and GND is for analog reference; FA/FB/FC are relay outputs; OC/OD are open-collector outputs.
• You can assign various functions (e.g. multi-step speeds, jog mode, fault reset, emergency stop, etc.) to the DI terminals according to production line demands.
• If not using a PLC, a simple method is to set the inverter’s run command source to “panel/terminal” on the unit and connect a potentiometer (10kΩ–20kΩ) to AI1 to provide a manual speed reference.

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IV. Key Function Parameter Settings

Below are typical function parameters of Yuqiang YQ3000-G11 inverters. Refer to the official manual for accuracy, as parameter numbers and names may vary by version. Common key parameters include:

1. Control Method Selection
   • For example: P00.0 = 2 means vector control (without PG); P00.0 = 0 means V/F control. Choose based on motor characteristics and load requirements.
   • For closed-loop vector (with encoder), select a model supporting a PG card and set P00.0 to the corresponding mode (e.g., 3 or 4).
2. Run Command Source
   • For example: P00.1 = 1 for terminal run commands; P00.1 = 2 for communication (RS485/Modbus) run commands; P00.1 = 0 for operation panel commands.
   • If the PLC’s digital outputs handle start/stop, set it to “terminal run command.”
3. Frequency Reference Source
   • For example: P00.2 = 1 for AI1 analog input; P00.2 = 2 for multi-step speed; P00.2 = 3 for communication reference; P00.2 = 0 for operation panel reference.
   • If the PLC’s analog output (0–10V) is used for speed reference, choose AI1.
4. Motor Parameter Settings (very important)
   • Set motor rated power, current, voltage, frequency, and speed. For vector control, these must be accurate.
   • E.g., P01.0 ~ P01.4 may correspond to rated voltage, rated current, rated power, rated frequency, rated speed (details depend on the manual).
5. Acceleration/Deceleration Times
   • For example: P00.3 (accel time), P00.4 (decel time). Adjust based on process needs. For large-inertia extruders, slightly lengthen accel/decel to prevent shock.
6. Maximum Frequency / Base Frequency
   • For example: P00.5 (max frequency), P00.6 (upper frequency limit), P00.7 (base frequency). Typically set to 50Hz or 60Hz, but can be increased if needed for the process.
7. Multi-Step Speeds / Simple Tension Control
   • If multi-step speeds are required, configure the corresponding parameters (e.g., P10.x ~ P11.x) and digital terminals.
   • For constant tension control, use vector mode with torque limiting or external PID (internal to the inverter or from the PLC).
8. Fault Protection and Monitoring
   • Set protection parameters such as overcurrent, overload, overvoltage, and choose how to reset faults (automatic or via terminal).
   • Configure the inverter’s relay outputs for fault or running signals to feed back to the PLC.

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V. Example of Specific Functional Implementation

1. Extruder Motor Speed Control
   • Hardware Link: PLC HMI -> PLC AO -> AI1 (inverter) -> inverter output -> motor
   • Process:
     1. Operator sets the desired extruder screw speed/throughput on the HMI (corresponding to 0–10V or 4–20mA). The PLC sends this analog signal to AI1 on the inverter.
     2. The PLC also outputs a digital run command (RUN) to DI1 on the inverter, starting it.
     3. The inverter, using vector or V/F control, drives the extruder motor at the specified speed.
     4. If a fault occurs, the inverter’s relay feedback signals the PLC, and the HMI displays an alarm.
2. Traction Motor Constant Line Speed Control
   • If precise tension control is not needed, maintain a fixed ratio between traction speed and main extruder speed. The PLC calculates a proportional command from the extruder speed/frequency and outputs it to the traction inverter.
   • For tension or speed tracking, use a tension sensor/dancing roller with a PID loop:
     1. The sensor provides a 4–20mA feedback to the PLC analog input, where a PID algorithm is carried out.
     2. The PLC analog output then drives AI1 on the traction inverter.
     3. Tuning the PID parameters keeps tension or roller position stable.
3. Winding Motor Tension Control (Optional)
   • A simple method is taper tension control, where torque or speed decreases as the roll diameter increases. Alternatively, use an external tension controller with the inverter.
   • If the inverter has a built-in PID, the tension sensor signal can be fed into AI2, and the inverter automatically adjusts the output frequency to maintain tension. Or the PLC can handle the loop and send a command to the inverter.
   • It is essential to coordinate with the traction speed to prevent slack or overstretching.

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VI. Text-Based Wiring and Control Diagram (Simplified Example)

Below is a rough diagram using dashes, omitting some components and multiple motors. It highlights the main structure:

================= Three-Phase Power =================
|        R          S          T                    |
|        |          |          |                    |
|      [Breaker]  [Contactor]  ...                  |
|        |          |                               |
|        \-------- Inverter (L1,L2,L3) -------------/
|                 |
|                 |--- U --- Main motor U
|                 |--- V --- Main motor V
|                 \---W --- Main motor W
|                                
|---- [PE] ------ Inverter PE --- Motor chassis ground
|
|============= PLC (Digital/Analog IO) & HMI ============
       |         PLC: Y0 --------------> DI1 (Inverter)
       |         PLC: Y1 --------------> DI2 (Inverter)
       |         PLC: COM -------------> DCM (Inverter)
       |
       |         PLC: AO0(0-10V) ------> AI1 (Inverter)
       |         PLC: AGND -----------> GND (Inverter)
       |
       |<< Inverter FA/FB/FC (Fault/Run) >> PLC X0 etc.
       |
       |----- HMI (Comm port) <----> PLC (Comm port)
       |
=========================================================

To control traction, winding, and fan motors with separate inverters, replicate the main circuit connection (each with its own three-phase power supply and protective devices). The control circuit can be expanded by assigning more digital outputs and analog outputs in the PLC, or using RS485 communication to reduce the number of analog channels.

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VII. Usage and Commissioning Recommendations

1. Pre-Startup Check
   • Verify the power supply voltage, wiring terminals, and grounding are correct.
   • Use a multimeter to check the voltage/resistance of AI1, DI1, etc., to ensure they match the design.
   • Ensure motor parameters are correctly set in the inverter.
2. Initial No-Load Test Run
   • Disconnect the motor from the load or run at low speed with no load. Observe current and voltage, and confirm correct rotation direction.
   • Test emergency stop, fault protection, and reset functions.
3. Load Test Run
   • Gradually apply load from a low speed, watching for overcurrent or temperature issues.
   • Observe the process effect (e.g., film thickness uniformity, tension stability) and adjust acceleration/deceleration time or PID parameters if necessary.
4. Parameter Optimization
   • If speed instability or tension fluctuation occurs, refine vector control gains, torque compensation, or PID settings as recommended by the manual.
   • Optimize the PLC program for traction and winding speed/tension coordination.
5. Fault and Protection
   • Set appropriate fault levels (whether the drive stops immediately on alarm, etc.) and any delay features to avoid inadvertent stoppage or delayed protection.
   • Regularly check the cooling path, filter, and fans for proper operation.

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VIII. Conclusion

By using multiple Yuqiang YQ3000-G11 inverters, one can separately drive the main extruder, traction, and winding motors of a film blowing machine, thus realizing automated control over production rate (speed), film thickness (speed ratio), and tension (winding).
For wiring, the main circuit employs a three-phase input and U/V/W outputs to the motor. The control circuit can flexibly employ PLC/HMI digital and analog signals for start/stop and speed references.
When configuring parameters, accurately input the motor’s rated data and set reasonable acceleration/deceleration times, maximum frequency, torque boost, tension control, and multi-step speeds.
In more complex setups involving tension control, dancing roller control, or multi-segment process curves, further development can be done using the inverter’s built-in functions or PLC logic for greater flexibility and parameter optimization.

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I. Typical Motors Requiring Control in Circular Looms and the Approach to Using the Inverter

In a circular loom, there are generally several main motors to consider:

1. Main Weaving Motor (Main Motor)
   • Used to drive the main shaft of the circular loom, weaving tubular fabric.
   • This motor often requires relatively precise speed regulation to match the requirements of yarn density, tension, etc.
   • It is recommended to use a vector-controlled inverter (i.e., VCD-2000 series full vector control) and perform motor parameter auto-tuning (dynamic or static) to ensure good low-speed torque output and speed accuracy.
2. Winding/Pulling Motor
   • Winds the woven fabric onto the take-up roller or provides a stable pulling force.
   • This motor also usually requires adjustable speed capability to maintain a stable pull speed under different diameter/tension conditions.
   • If constant tension is required, consider using the inverter’s built-in PID regulation function (function group P7) by detecting the tension sensor feedback signal to adjust speed automatically.
3. Warp Feeding or Auxiliary Motor
   • Used for feeding warp yarn, adjusting the yarn creel, or driving other auxiliary mechanisms. If it only requires simple speed changes or two to three speed stages, you can use the multi-speed function of the inverter (P3.26–P3.32) or simple external terminal switching.

Note: Whether each motor on the circular loom should be equipped with its own inverter depends on the production line requirements. This example focuses on a typical dual-inverter control plan for a “main weaving motor + winding motor.” If the equipment structure is simpler, you can equip only the main weaving motor with an inverter.

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II. Hardware Wiring

The wiring approach and terminal names/functions mentioned below are based on standard designations in the VCD-2000 series inverter manual. If your model’s terminal labels differ slightly, please refer to the actual nameplate and manual.

1. Main Circuit (Power Supply) Wiring

• Connect the three-phase AC380V (or AC220V, depending on the model) power supply to the inverter input terminals R, S, T.
  • If it is a single-phase model, connect only two wires (R, T) for single-phase 220V.
• The three output wires of the motor connect to the inverter output terminals U, V, W (ensure they match the U, V, W in the motor junction box; if the running direction is opposite the desired direction, swap any two motor leads or use the reverse command).
• PE terminal (ground): Ensure both the inverter and motor have reliable grounding, typically via a dedicated ground wire directly connected to the cabinet ground bus or welded to the plant protective ground.
• If a braking resistor is needed (for quick stopping or significant regenerative energy), connect one side of the resistor to the inverter terminal P+ (labeled “+” or “P”) and the other side to B (labeled “PB” or “DB”), and set the relevant braking parameters in the function codes (e.g., P2.05, P2.06, etc.).

2. Control Terminal Wiring — Example for Main Weaving Motor

Below is an ASCII-style diagram of a common “external terminal start/stop + analog potentiometer speed control + fault output” wiring configuration. If multi-speed, forward/reverse, PID regulation, etc. are required, you can adjust and expand upon this basic framework.

  ┌───────────────────────── VCD-2000 Inverter ──────────────────────────┐
  │   Main Circuit:                          Control Terminals (CN2 etc.)│
  │  ┌───────────┐                                                      │
  │  │ R  S  T    │<--- 3-phase AC input (AC380V)                        │
  │  │            │                                                      │
  │  │ U  V  W    │---> Connect to Main Weaving Motor (M1)               │
  │  │            │                                                      │
  │  │ P+   B     │---> Braking resistor here if needed                  │
  │  │ PE (Ground)│---> Ground                                           │
  │  └───────────┘                                                      │
  │                                                                     │
  │  Control Terminals Example:                                         │
  │    +24V ---[X1]---┐  (Example: X1 as forward FWD start command)      │
  │                   ├---> COM                                          │
  │    +24V ---[X2]---┘  (Example: X2 as reset or jog, depending on need)│
  │                                                                     │
  │  (Speed Set via Potentiometer)                                      │
  │     10V ---[Pot]--- VI                                             │
  │                 Other end of Pot --- GND                             │
  │                                                                     │
  │  (Fault Relay Output)                                               │
  │     TA ---  Relay NO Contact  --- TB                                 │
  │           Connect to external alarm circuit or indicator;           │
  │           TA-TB closing indicates inverter fault, etc.              │
  │           Refer to P4.11 or similar for multi-function output setup  │
  │  COM (Digital Common) and GND (Analog Ground) are separate, each    │
  │  single-point grounded nearby.                                       │
  └──────────────────────────────────────────────────────────────────────┘

• Terminals X1–X6 can be assigned various functions in function codes P4.00–P4.07. In this example, X1 is set to “Forward Run” (FWD), and X2 can be set to “Reset/Stop” or “Jog,” etc.
• If you need both forward and reverse, assign X1 = FWD and X2 = REV.
• If you want to switch between panel (or PLC) control and external terminals, you can use multi-function terminals to implement “command channel switching” and “frequency channel switching” (assign codes 23, 24, etc. to P4.00–P4.07).
• If you need PID tension control, connect the tension sensor (4–20mA or 0–10V) to CI or VI, then configure the relevant PID parameters in P7.00–P7.33.

3. Winding/Pulling Motor Inverter Wiring

• The wiring principle is the same as for the main weaving motor. For constant tension winding, connect a tension sensor or pressure sensor output (4–20mA) to the inverter’s CI (or VI), and enable the PID function (P7.00=1).
• Usually, you need to set P7.01=0 (digital setpoint) or 1 (analog setpoint) and P7.02=0 (VI feedback) or 1 (CI feedback) accordingly. Then configure P7.05 to match the feedback reading for the desired tension.

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III. Core Function Codes and Parameter Examples

Below are key configuration ideas to help you understand typical debugging requirements for circular loom applications. In actual production, adjust them according to the motor nameplate, process needs, and auto-tuning results.

1. Basic Motor Parameter Auto-Tuning (Group PA)

• PA.01: Motor Rated Power (kW)
  For example, 5.5 kW → set 5.5
• PA.02: Motor Rated Voltage (V)
  For a 380V motor → set 380
• PA.03: Motor Rated Current (A)
  According to the nameplate, e.g., 11.3A
• PA.04: Motor Rated Frequency (Hz)
  Typically 50Hz
• PA.05: Motor Rated Speed (rpm)
  For example, 1420 rpm
• PA.06: Motor Poles
  For a 4-pole motor → set 4
• PA.00: Auto-Tuning Mode
  • 1 = Dynamic auto-tuning (if the motor can be unloaded); press RUN to start.
  • 2 = Static auto-tuning (if it cannot be unloaded).
  After auto-tuning, you get better low-speed torque and stable speed performance.

2. Basic Operation Parameters (Group P0)

• P0.00: Run Command Channel
  • 0: Keypad control
  • 1: External terminal control (common usage)
  • 2: Serial port (RS485) control
• P0.01: Frequency Reference Channel
  • 0: Keypad potentiometer
  • 5: External potentiometer (0–5V/0–10V)
  • 6: Analog current (4–20mA)
• P0.03: Start/Stop Channel
  • 0: Keypad start/stop
  • 1: External terminal start/stop

3. Frequency/Current Reference Parameters (Group P1)

• If using a 0–10V external potentiometer, set P1.04 = 10.00.
• If using a 4–20mA signal, switch JP3 to “I” and configure P1.07 / P1.08 / P1.09 for the range limits.

4. Start/Stop and Braking (Group P2)

• P2.00 / P2.01: Acceleration/Deceleration Time
  For instance, 3.0s to 5.0s, depending on the machine’s inertia. Since a circular loom has relatively large inertia, you can extend acceleration time appropriately to avoid overcurrent trips.
• P2.05 / P2.06: DC Braking Start Frequency and Current
  If you need a quick “spot brake” on stopping, you can enable DC braking; just avoid motor overheating.

5. Multi-Speed / Simple PLC (Groups P3 / P8)

If you want an inverter to achieve multiple speeds (e.g., low-speed threading, high-speed operation, inspection speed, etc.), combine the multi-function input terminals X1–X6 in different combinations to get multi-speed operation.

• P3.26–P3.32: Multi-speed frequencies 1–7
• P4.00–P4.07: Assign X1, X2, etc., as multi-speed terminals
  For more complex sequencing, you can use the PLC function (Group P8) for automatic speed changes.

6. PID Closed-Loop (Group P7) (e.g., Tension Control Motor)

• P7.00: Enable PID Regulation → 1 = closed-loop
• P7.01: Setpoint Channel and P7.02: Feedback Channel
  • Example: Setpoint channel = digital (0), feedback channel = VI (0) or CI (1).
• P7.05: Target Setpoint
  • For instance, if the pressure sensor outputs 0–5V corresponding to 0–5 kg tension and you want to maintain 3 kg, set the voltage at 3 kg as your target.
• P7.11, P7.12, P7.13: PID Proportional, Integral, Derivative Gains
  • Adjust on-site. Increasing P7.12 helps stability, reducing oscillations.

7. Protection and Fault Handling (Groups P5 / P6)

• Overcurrent, overvoltage, phase loss, stall, reversed phase sequence, etc., can be set via the P5 group thresholds. You can also check fault records in P6.
• To output fault signals to an external alarm indicator, set the function for TA, TB, or OC1 in P4.10–P4.11 to “Inverter Fault Output” or “Running Signal,” etc.

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IV. Key Implementation Points

1. Main Weaving Motor
   • Start/Stop: If X1 = FWD with +24V → COM, closing X1 starts forward run, opening it stops. If reverse is needed, set X2 = REV.
   • Speed Control: If using an external potentiometer, wire it to 10V, VI, GND. Then set P0.01=5, and P1.04=10.00 (or 5.00).
   • Electronic Thermal Protection: After configuring PA.01–PA.06 for rated motor parameters, check P5.00–P5.04 for motor overload protection.
2. Winding/Pulling Motor (if tension detection is involved)
   • Connect the 4–20mA tension sensor signal to the inverter’s CI, set JP3 to “I.” Then set P7.00=1 (PID), P7.02=1 (CI feedback), P7.01=0 (digital setpoint) or otherwise, and P7.05 for the target tension value (converted from the sensor).
   • Adjust PID parameters (P7.11, P7.12, P7.13) as needed. During actual winding, check changes in roll diameter, tension error, oscillations, etc., then fine-tune the PID.
3. Multi-Speed / Manual Adjustments
   • During setup or maintenance, you may need low-speed creeping, repeated jog, etc. You can set X3 or X4 to “Jog Run” or “Multi-Speed Selection,” and assign relevant frequency values (P3.06, P3.26–P3.32). During production, simply toggle the switch or foot pedal to switch speeds quickly.
4. Fault Alarms and Safety Interlocks
   • It is recommended to connect the inverter’s TA-TB (or OC1) relay contact to an external audible/visual alarm circuit or to an upper-level PLC for monitoring. This prevents undetected faults that could damage machinery or cause safety incidents.
   • Circular looms often have mechanical interlocks or photoelectric sensors, which can also be connected to the inverter’s X terminals for quick stopping or emergency braking.

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V. A More Intuitive “Central Control + Multiple Motors” Layout (Brief)

If a single circular loom has multiple motors that need coordination, you can use these approaches:

1. Independent Inverters + Upper-Level PLC: Each motor has a VCD-2000 inverter, and the PLC gathers all sensors (speed, tension, switches, etc.) as well as HMI operations, then issues run commands/frequency references to each inverter via RS485 or digital signals.
2. Master-Slave Mode: Set the main weaving motor’s inverter as the master, using the inverter’s built-in RS485 to send the speed or frequency to other slave inverters (function codes P4.21, P4.22, etc.). Ensure consistent inverter parameters and non-conflicting communication addresses.

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VI. Common Precautions

1. Confirm Motor Insulation: Especially for older motors or in harsh environments, measure insulation first to ensure it meets the inverter’s requirements.
2. Low-Speed Cooling: If the loom will run for a long time at low speed with high torque, consider forced ventilation or a specially designed motor for inverters.
3. Electromagnetic Interference (EMI): Strictly separate power cables from control signals or use shielded cables. If high accuracy is required for surrounding instruments, add line reactors or filters.
4. Altitude Considerations: Above 1000 meters, you may need to derate the inverter or increase cooling.
5. Ensure Adequate Safety Measures: Emergency stop and electrical interlocks should be paired with the inverter control terminals or external relays, tested thoroughly before production runs.

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VII. Example Summary

In conclusion, for circular loom applications, the VCD-2000 series inverter can independently drive the main weaving motor and the winding/pulling motors. By configuring appropriate function codes and connecting external sensors/signals, you can implement multi-speed operation, PID tension control, fault-linked alarms, and more. The key steps are:

1. Mechanical and Electrical Integration: Verify the power requirements of each shaft on the loom, select inverters with sufficient capacity, complete main circuit wiring, and ensure PE grounding.
2. Control Terminal Planning: Assign X1–X6, FWD, and REV terminals for start/stop, forward/reverse, jog, multi-speed, PID enable, etc., according to the loom’s process needs.
3. Parameter Settings: Perform motor auto-tuning in PA.00–PA.06, then adjust P0 (operation/frequency channel), P2 (accel/decel), P3/P8 (multi-speed/PLC), P4 (terminal definition), and P7 (PID) step by step based on on-site testing.
4. Interlock Protection and EMI Suppression: Pay attention to low-speed heat dissipation, electromagnetic compatibility, fault relay outputs, and alarm circuits.

Following these practices, the circular loom can achieve excellent speed control performance, improve fabric quality and efficiency, reduce mechanical shock, and extend equipment lifespan. If later you need remote monitoring or more advanced automation, you can utilize the inverter’s built-in RS485 port to integrate with PLCs or HMIs. Please consult production requirements, safety standards, and the inverter manual for detailed on-site adjustments. Best wishes for a successful application!

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I. Introduction

With the development of industrial technology, rubber, plastic, and other polymer materials have been widely used in automotive, electronics, construction, and other fields. However, these materials are prone to environmental influences during actual use, especially ozone erosion, which can cause aging, hardening, cracking, and significantly impact their service life and safety. To scientifically and accurately evaluate the ozone aging resistance of materials, ozone aging test chambers have been developed. This article takes the SDQ-300 Series Ozone Aging Test Chamber as an example to explore its working principle, key components, and application fields.

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II. Functions of the SDQ-300 Series Ozone Aging Test Chamber

1. Simulating Ozone Environment for Aging Tests

The core function of the SDQ-300 series ozone aging test chamber is to simulate ozone-containing atmospheric environments for accelerated aging tests of rubber, plastics, coatings, and other materials. By controlling the ozone concentration, temperature, and humidity within the chamber, it can reproduce the aging process of materials under different environmental conditions, helping enterprises and research institutions evaluate the durability of materials.

2. Providing Standardized Aging Performance Testing

This series of test chambers can conduct tests according to international standards such as GB/T 7762, ISO 1431-1, ASTM D1149. By analyzing the aging speed, crack generation, and changes in physical properties of materials under specific ozone concentrations and temperature and humidity conditions, it provides scientific data for material selection and process improvement.

3. Wide Range of Applications

The SDQ-300 series is widely used in automotive manufacturing (such as seals, tires), cable sheaths, plastic pipes, and coating materials. Its accurate environmental simulation function makes it an indispensable tool in quality inspection, scientific research, and third-party testing organizations.

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III. Working Principle of SDQ-300 Ozone Aging Test Chamber

1. Ozone Generation and Control

The SDQ-300 series mainly generates ozone through the corona discharge method, which ionizes oxygen molecules into ozone using high-voltage discharge tubes. The ozone concentration can be adjusted in the range of 0~200 ppm. The built-in UV photometer or electrochemical ozone sensor monitors the ozone concentration in real-time and adjusts the operating status of the ozone generator through a PID control algorithm, ensuring the stability of the ozone concentration.

2. Temperature and Humidity Control

• Temperature Control: Uses an electric heater to provide heat, with real-time temperature monitoring by PT100 thermocouples. Some models are also equipped with compressor cooling systems for low-temperature tests.
• Humidity Control: Uses an ultrasonic humidifier or steam humidifier to provide humidity, combined with a cooling and dehumidification system to precisely maintain the humidity within the set range.

3. Gas Circulation and Uniformity Assurance

The built-in circulation fan ensures uniform ozone gas flow inside the chamber. With a well-designed air duct system, it ensures that the surface of the sample is exposed to a consistent ozone concentration, minimizing test errors.

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IV. Key Components of the SDQ-300 Test Chamber

1. Ozone Generator

Adopts the corona discharge method, characterized by high efficiency and controllable concentration. By adjusting the input voltage and frequency, the ozone output can be modified to suit different test requirements.

2. Ozone Sensor

• UV Photometer Sensor: Based on the absorption characteristics of ozone for ultraviolet light, offering high accuracy and fast response.
• Electrochemical Sensor: Cost-effective, suitable for routine testing requirements.

3. Temperature and Humidity Control System

• Electric Heater + Solid State Relay (SSR): Provides fast response and long service life for heating control.
• Cooling System (Compressor + Condenser + Evaporator): Uses refrigerant circulation for high-efficiency low-temperature conditions.
• Humidity Sensor: Typically uses capacitive humidity probes for minimal error.

4. Control System (PLC + HMI Touch Screen)

• PLC (e.g., Siemens S7-1200 or Omron CP1H): Controls real-time ozone concentration, temperature, and humidity.
• HMI Touch Screen (e.g., Weintek / Siemens 7-inch screen): For parameter settings, data monitoring, and alarm information display.
  

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V. How to Design a Control System? Required Materials

1. Sensor Section

Name	Specification	Quantity	Reference Price (CNY)
Ozone Sensor	UV Photometer / Electrochemical Sensor	1	3000
Temperature Sensor	PT100 / K-type Thermocouple	1	200
Humidity Sensor	Capacitive Humidity Sensor	1	150

2. Actuators

Name	Specification	Quantity	Reference Price (CNY)
Ozone Generator	Corona Discharge 0-200ppm	1	5000
Heater	Electric Heater 2KW	2	300
Humidifier	Ultrasonic Humidifier	1	1000

3. Controller and Software

• PLC Controller (Siemens S7-1200 / Omron CP1H): 1 unit
• HMI Touch Screen (Weintek 7-inch): 1 unit
• Power Module (24V DC 5A): 1 unit
• Data Acquisition and Analysis Software: 1 set

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VI. Application Cases and Advantages of SDQ-300 Test Chamber

1. Application in the Automotive Industry

Used to test rubber seals and tires for aging resistance under high temperature, high humidity, and high ozone environments, ensuring their reliability in actual applications.

2. Application in Cable and Wire Industry

Tests cable sheath materials for cracking and strength changes in ozone environments, preventing safety risks during long-term use.

3. Summary of Advantages

• High-Precision Control: Utilizes PLC and HMI systems for precise control of ozone concentration, temperature, and humidity.
• Comprehensive Test Standards: Capable of executing multiple international test standards with wide applicability.
• High Safety Performance: Equipped with over-temperature protection, ozone leakage alarm, and exhaust system for multiple safety guarantees.

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VII. Conclusion

The SDQ-300 series ozone aging test chamber, with its high-precision control capabilities and wide application range, has become an essential tool for testing the ozone resistance of industrial materials. By reasonably configuring sensors, actuators, and control systems, it ensures not only the accuracy of the test but also improves testing efficiency. In the future, with the advancement of material technology, ozone aging test chambers will play an increasingly important role in a broader range of fields.