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 rotor position using a PLL-based approach
- Uses measured current and generated voltage for estimation.
- Utilizes filters for back EMF and speed.
- Computes the exact position of the rotor.
- During rapid accelerations and decelerations, the rotor position is dynamically tracked using PLL.
- Operates in per unit, where 216 represents rated values.
Documentation
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| BLDC Estimator User Guide | Download |