How to Use SimpleFOC Mini: Examples, Pinouts, and Specs

The SimpleFOC Mini by ZORZA is a compact and efficient motor driver designed for controlling brushless DC (BLDC) motors using advanced Field Oriented Control (FOC) techniques. This component is ideal for applications requiring precise motor control, such as robotics, automation systems, gimbals, and drones. Its small form factor and robust design make it a versatile choice for both hobbyists and professionals.

• Robotics (e.g., robotic arms, mobile robots)
• Drones and UAVs
• Gimbal stabilization systems
• Industrial automation
• Electric vehicles and e-bikes

The following table outlines the key technical details of the SimpleFOC Mini:

The SimpleFOC Mini features a straightforward pinout for easy integration into your projects. Below is the pin configuration:

1. Power Supply: Connect a DC power source (6V - 25V) to the VIN and GND pins. Ensure the power supply can handle the motor's current requirements.
2. Motor Connection: Connect the three phases of your BLDC motor to the MOTOR_A, MOTOR_B, and MOTOR_C pins.
3. Control Signals:
   • Use the PWM pin to control the motor's speed.
   • Use the DIR pin to set the motor's rotation direction.
   • Optionally, connect the EN pin to enable or disable the motor driver.
4. Communication: Depending on your application, connect the appropriate communication interface (UART, I2C, or SPI) to your microcontroller or host device.
5. Programming: Configure your microcontroller to send control signals or commands to the SimpleFOC Mini.

• Heat Dissipation: The SimpleFOC Mini is designed for efficient operation, but ensure adequate ventilation or cooling if operating at high currents for extended periods.
• Motor Compatibility: Verify that your BLDC motor operates within the voltage and current limits of the SimpleFOC Mini.
• Signal Integrity: Use short, shielded wires for communication lines to minimize noise and interference.
• Power Supply: Use a stable and noise-free power supply to avoid erratic motor behavior.

Below is an example of how to control a BLDC motor using the SimpleFOC Mini and an Arduino UNO:

#include <SimpleFOC.h> // Include the SimpleFOC library

// Define motor and driver pins
#define MOTOR_A_PIN 9
#define MOTOR_B_PIN 10
#define MOTOR_C_PIN 11
#define ENABLE_PIN 8
#define DIR_PIN 7
#define PWM_PIN 6

// Create a BLDC motor object
BLDCMotor motor = BLDCMotor(7); // 7 pole pairs (adjust for your motor)

// Create a driver object
BLDCDriver3PWM driver = BLDCDriver3PWM(MOTOR_A_PIN, MOTOR_B_PIN, MOTOR_C_PIN, ENABLE_PIN);

void setup() {
  // Initialize the driver
  driver.voltage_power_supply = 12; // Set power supply voltage
  driver.init();
  motor.linkDriver(&driver);

  // Set motor parameters
  motor.voltage_limit = 6; // Limit motor voltage
  motor.velocity_limit = 100; // Limit motor speed
  motor.controller = MotionControlType::velocity;

  // Initialize motor
  motor.init();
  motor.initFOC();

  Serial.begin(115200); // Start serial communication
  Serial.println("SimpleFOC Mini Initialized");
}

void loop() {
  // Set motor speed based on user input
  if (Serial.available()) {
    float target_velocity = Serial.parseFloat(); // Read target speed
    motor.move(target_velocity); // Command motor to move
  }
}

• Replace 7 in BLDCMotor(7) with the actual number of pole pairs for your motor.
• Ensure the voltage_power_supply matches your power source.

1. Motor Not Spinning:

   • Ensure the EN pin is set to HIGH to enable the driver.
   • Verify the motor connections to MOTOR_A, MOTOR_B, and MOTOR_C.
   • Check the power supply voltage and current ratings.

2. Erratic Motor Behavior:

   • Verify that the control signals (PWM, DIR) are stable and noise-free.
   • Ensure the motor parameters (e.g., pole pairs, voltage limit) are correctly configured in the code.

3. Overheating:

   • Check for proper ventilation or add a heatsink if necessary.
   • Reduce the motor's current draw by limiting the voltage or speed.

4. Communication Issues:

   • Ensure the correct communication protocol (UART, I2C, SPI) is selected and configured.
   • Use pull-up resistors for I2C lines if required.

Q: Can I use the SimpleFOC Mini with a stepper motor?
A: No, the SimpleFOC Mini is specifically designed for BLDC motors and does not support stepper motors.

Q: What is the maximum motor speed supported?
A: The maximum speed depends on the motor's specifications and the control algorithm. Ensure the motor operates within the voltage and current limits of the SimpleFOC Mini.

Q: Can I use a 5V power supply?
A: No, the minimum input voltage for the SimpleFOC Mini is 6V. Using a lower voltage may damage the component or result in unstable operation.

Q: Is the SimpleFOC Mini compatible with other microcontrollers?
A: Yes, it can be used with any microcontroller that supports UART, I2C, or SPI communication, such as ESP32, STM32, or Raspberry Pi.

For further assistance, refer to the official ZORZA documentation or contact their support team.