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BLDC_ESTIMATOR

This brushless DC (BLDC) motor estimator calculates the rotor's position and speed by analyzing motor parameters, voltage, and current. The algorithm relies on back-EMF estimation and filtering. A motor model, constructed using the motor's resistance (Rs), inductance (Ls), and sampling time (Ts), receives the applied motor voltages and measured currents to compute the back-EMF. A Phase-Locked Loop (PLL) extracts the rotor's electrical position from the filtered back-EMF signal.


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Features and Benefits

 

  • Estimates the rotor position using PLL based approach
  • Uses measured current and generated voltage for estimation
  • Uses filters for back emf and speed.
  • Computes the exact posiiton of the rotor. 
  • During rapid accelerations and deaccelerations, the rotor posiiton is dynamically tracked using  PLL. 
  • Operates in per unit, where 2^16 represents rated values

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    Documentation

    Title
    BLDC Estimator User Guide Download