blog:2024-02-06_github_eferu_bldc-motor-control-foc

2024-02-06 Github: EFeru / bldc-motor-control-FOC

Field Oriented Control (FOC) for BLDC motors

Link

https://github.com/EFeru/bldc-motor-control-FOC

FOC Architecture

The FOC architecture includes:
- Estimations: estimates the rotor position, angle and motor speed based on Hall sensors signal
- Diagnostics: implements error detection such as unconnected Hall sensor, motor blocked, MOSFET defective
- Control Manager: manages the transitions between control modes (Voltage, Speed, Torque)
- FOC Algorithm: implements the FOC strategy
- Control Type Manager: Manages the transition between Commutation, Sinusoidal, and FOC control type
The FOC algorithm architecture is illustrated in the figure below:
In this implementation 3 control types are available:
- Commutation
- SIN (Sinusoidal)
- FOC (Field Oriented Control) with the following 3 control modes:
  - VOLTAGE MODE: in this mode the controller applies a constant Voltage to the motors.
  - SPEED MODE: in this mode a closed-loop controller realizes the input speed target by rejecting any of the disturbance (resistive load) applied to the motor.
  - TORQUE MODE: in this mode the input torque target is realized. This mode enables motor “freewheeling” when the torque target is 0.

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