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BLDC Driver configuration

Arduino SimpleFOClibrary implements support for two types of BLDC driver control interfaces:

  • 3PWM - class BLDCDriver3PWM
  • 6PWM - class BLDCDriver6PWM

Classes BLDCDriver3PWM and BLDCDriver6PWM provide an abstraction layer of all the hardware/platform specific code for all the supported platforms: atmega328, esp32, stm32 and teensy. They implement:

  • PWM configuration
    • PWM frequency
    • PWM center-alignment
    • Complementary channel (6PWM)
    • Dead zone/dead time (6PWM)
  • PWM duty cycle setting
  • Voltage limiting

These classes can be used as stand-alone classes and they can be used to set certain PWM value to the BLDC driver outputs, see example codes in utils > driver_standalone_test. In order for FOC algorithm to work the BLDCDriverxPWM classes are linked to a BLDCMotor class which uses the driver to set the appropriate phase voltages.

The driver code is written in a way to support as many different drivers out there as possible and in a way to be fully interchangeable.

Digging deeper

For more theoretical explanations and source code implementations of the FOC algorithm and the motion control approaches check out the digging deeper section.