Product Review: 24V Micro Compressor Refrigeration Air Conditioning Suit Control Board Vector Sine Wave DC Brushless Motor Driver

Are you looking for a reliable and efficient control board for your 24V micro compressor refrigeration air conditioning suit? Look no further! We present to you the GE2117-12V, a high-quality control board designed specifically for DC brushless motors.

Product Features

The GE2117-12V control board comes with a range of impressive features that make it an excellent choice for your air conditioning system:

1. Customizable Parameters: The control board allows customers to set relevant parameters according to their specific requirements.

2. Optimized Starting: With special starting optimization, the compressor can start worry-free, ensuring smooth operation.

3. Wide Voltage Range: The control board can work at a wide range of voltages, providing flexibility in various applications.

4. FOC Sine Wave Control: Utilizing FOC sine wave control technology, the control board ensures low noise operation, minimizing disturbances.

5. Maximum Power Limiting: Equipped with a maximum power limiting function, the control board effectively protects the compressor from overload and damage.

6. Low Speed Torque Compensation: The control board features low speed torque compensation, enabling stable speed control even at low speeds.

7. Compact and Space-Saving: The control board boasts a compact structure and small size, making it easy to integrate into your air conditioning system.

Electrical Parameters

Installation Size

The installation size of the control board is not provided in the product information. However, please refer to the product manual or contact the manufacturer for detailed installation instructions.

Driver Interface Definition

The control board features two ports for different control purposes:

1. Port 1 - Serial Port Control Line (Photoelectric Isolation):

   • Red: +5V Input Connector
   • Yellow: TTL UART Txd
   • White: TTL UART Rxd
   • Black: ISO GND (Not Grounded with Internal Drive, Requires External Input Voltage for +5V)

2. Port 2 - Switch and Analog IO Port (Non-Isolated Control) (Optional Wiring):

   • Red: +5V (Signal 5V, No Output Current)
   • Yellow: Sp Speed Signal Input 0-5V
   • Black: GND Power Signal Ground
   • Green: Run Start-Stop Enabled
   • Blue: DIR Compressor Fixed Speed Enable
   • White: FG Compressor Operating Speed Frequency Output

Driver Connection Diagram

The product information does not include a driver connection diagram. Please consult the product manual or contact the manufacturer for specific wiring instructions.

Drive Control Function

The drive follows a certain power-on and operating logic:

1. Upon power-on, the drive waits for 10 seconds before starting to receive instructions.

2. When the start signal is received, the drive initializes the start speed at 3000rpm, regardless of the set speed. It stabilizes at 3000rpm for 10 seconds and then gradually closes the loop to the set speed value.

3. Sending a shutdown command, if the current speed is above 3000rpm, the drive slows down first. After the speed goes below 3000rpm, the compressor stops working. If the current speed is already below 3000rpm, the drive stops directly.

4. Starting again requires an operating interval of 10 seconds. If this interval is not respected, the drive remains in a waiting state. Once the interval is reached, a startup judgment is made.

5. After a drive failure, except for a hardware current fault, the drive will automatically restart up to 5 times. If the restart attempts exceed 5 times, the drive shuts down and waits for the power to reset. Resending the start command can clear faults other than current faults.

Drive IO Control (Port 2)

1. Enable Control:

   • Short circuit the black line (GND) on Port 2 with the green line (RUN) to enable control.

   Note: By default, the drive is active high. This means that if no wires are connected, as long as the speed signal is given, the drive is enabled. If the RUN line is shorted to ground (GND), the drive is disabled regardless of the speed setting, and the compressor will not work.

2. Speed Adjustment Control:

   • External signal line definition:

     • Red: +5V
     • Yellow: SPD speed input signal
     • Black: GND

   • The SPD interface accepts potentiometer adjustment or 0-5V analog input.

   Note: The SPD interface accepts a voltage range of 0-5V with a frequency range of 200Hz-1KHz. The duty cycle of the PWM (Pulse Width Modulation) signal determines the control.

3. Fixed Speed Mode:

   • Signal line definition:

     • Blue: Fixed speed enable line
     • Black: GND

   • By connecting the blue and black wires as specified, the compressor runs at the set frequency according to the program settings. The system initializes at 3600rpm (This speed can be changed by adjusting the value of 0x1023).

   Note: The system is enabled by default. Directly shorting these two wires can drive the compressor to work at a fixed speed.

Drive Communication Control

The control board supports communication control via Port 1. The communication rate is set at 9600 N 8 1. The driver can receive customized protocol control and modbus protocol control.

• Serial Port Line:

  • Red: +5V Input
  • Yellow: Rxd
  • White: Txd
  • Black: GND

  Note: The ISO GND and GND are not connected internally and are required for photoelectric isolation.

Speed Output IO

The white line represents the speed output signal. There is one pulse per electrical angle, and the number of output pulses per motor revolution is logarithmic. By measuring the frequency of the output square wave, the motor speed can be obtained. The output is an open-collector signal, requiring a pull-up resistor of 1-10K to be connected. Do not directly connect it to the power supply, as it may permanently damage the function.

Speed Calculation: RPM = Measured FG-OUT Frequency (Hz) * 60 / Motor Pole Pairs

Drive Error Indication

The control board provides error indication for various faults. Here is a list of fault numbers and their corresponding descriptions:

Conclusion

The GE2117-12V control board is a reliable and feature-rich solution for controlling your 24V micro compressor refrigeration air conditioning suit. With its customizable parameters, optimized starting, and wide voltage range, it offers flexibility and improved performance. The compact size makes it easy to integrate into your system, and the range of protection functions ensures the safety of the compressor. Whether you are a professional or a DIY enthusiast, this control board is a great investment for your air conditioning system.

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