How to Use 24V 4WD Electric Brushed DC Motor Controller : Examples, Pinouts, and Specs

The 24V 4WD Electric Brushed DC Motor Controller (Manufacturer: L-faster, Part ID: Part 4) is a versatile device designed to regulate the speed and direction of 24V brushed DC motors. It is specifically tailored for four-wheel drive (4WD) applications, making it ideal for robotics, electric vehicles, and other motorized systems requiring precise control.

This motor controller enables efficient operation by providing smooth acceleration, deceleration, and directional control. It is robust and reliable, making it suitable for both hobbyist and industrial applications.

• Robotic vehicles and platforms
• Electric scooters and bicycles
• Remote-controlled cars and trucks
• Automated guided vehicles (AGVs)
• DIY motorized projects

The motor controller has several input and output connections. Below is the pin configuration:

1. Power Connection: Connect a 24V DC power supply to the +24V and GND pins of the motor controller.
2. Motor Connection: Attach the brushed DC motor to the M+ and M- terminals.
3. Control Signal Input:
   • Use a microcontroller (e.g., Arduino UNO) to generate a PWM signal for speed control.
   • Connect the PWM signal to the PWM pin.
   • Use a digital output pin to control the DIR pin for motor direction.
   • Optionally, use another digital output pin to control the EN pin for enabling/disabling the motor.
4. Testing: Power on the system and test the motor's speed and direction by varying the PWM signal and toggling the DIR pin.

• Ensure the power supply voltage does not exceed 24V to avoid damaging the controller.
• Use appropriate heat dissipation methods (e.g., heat sinks) if the motor operates at high currents for extended periods.
• Always connect the GND of the motor controller to the GND of the microcontroller to ensure proper signal referencing.
• Avoid sudden changes in direction at high speeds to prevent motor damage.

Below is an example of how to control the motor controller using an Arduino UNO:

// Define pin connections
const int pwmPin = 9;  // PWM signal pin
const int dirPin = 8;  // Direction control pin
const int enPin = 7;   // Enable pin

void setup() {
  // Set pin modes
  pinMode(pwmPin, OUTPUT);
  pinMode(dirPin, OUTPUT);
  pinMode(enPin, OUTPUT);

  // Initialize motor controller
  digitalWrite(enPin, HIGH);  // Enable the motor controller
  digitalWrite(dirPin, LOW);  // Set initial direction to reverse
}

void loop() {
  // Example: Gradually increase motor speed
  for (int speed = 0; speed <= 255; speed++) {
    analogWrite(pwmPin, speed);  // Set motor speed (0-255)
    delay(20);                   // Wait for 20ms
  }

  // Change direction
  digitalWrite(dirPin, HIGH);  // Set direction to forward
  delay(1000);                 // Wait for 1 second

  // Gradually decrease motor speed
  for (int speed = 255; speed >= 0; speed--) {
    analogWrite(pwmPin, speed);  // Set motor speed (0-255)
    delay(20);                   // Wait for 20ms
  }

  // Disable motor for 2 seconds
  digitalWrite(enPin, LOW);  // Disable the motor controller
  delay(2000);               // Wait for 2 seconds
}

1. Motor Does Not Run:

   • Ensure the power supply is properly connected and providing 24V DC.
   • Verify that the EN pin is set to HIGH to enable the motor controller.
   • Check the motor connections (M+ and M-) for loose or incorrect wiring.

2. Motor Runs in the Wrong Direction:

   • Check the logic level of the DIR pin. Set it to HIGH for forward and LOW for reverse.
   • Verify the motor wiring polarity.

3. Motor Speed is Not Adjustable:

   • Ensure the PWM signal is being correctly generated by the microcontroller.
   • Verify that the PWM pin is properly connected to the microcontroller's PWM output.

4. Overheating:

   • Ensure the motor is not drawing more current than the controller's maximum rating (30A).
   • Use a heat sink or cooling fan to dissipate heat during prolonged operation.

Q: Can I use this controller with a 12V motor?
A: No, this controller is specifically designed for 24V brushed DC motors. Using it with a 12V motor may result in suboptimal performance or damage.

Q: What is the maximum PWM frequency supported?
A: The controller supports PWM frequencies up to 20 kHz.

Q: Can I control multiple motors with this controller?
A: No, this controller is designed to control a single brushed DC motor. For multiple motors, use additional controllers.

Q: Is reverse braking supported?
A: No, this controller does not support active braking. It only provides forward and reverse direction control.

This concludes the documentation for the 24V 4WD Electric Brushed DC Motor Controller. For further assistance, refer to the manufacturer's support resources.