The Brush Less DC (BLDC) estimator computes the rotor position based on motor parameters, voltage, and current values. The block also estimates motor speed. The algorithm is based on back-emf estimation and filtering. The motor parameters Rs, Ls, and sampling time Ts are used to build motor model. The voltages that are fed to the actual motor are fed to the motor model along with motor currents and are used to compute back-emf. A Phase-Locked Loop (PLL) structure is used to find the angle of filtered back emf which is, aligned to rotor electrical position.
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Features and Benefits
- High-resolution sensorless estimation :
- BLDC rotor position and speed is measured using back-EMF filtered through a PI-controlled PLL for robust performance during fast dynamics.
- Highly configurable :
- Multiple filtering and tuning inputs, with built-in control flags and buffering.
- Efficiency :
- Resource usage and validated at 200 MHz, making it suitable for high-performance motor control applications.
- Integration :
- Operates in per unit, where 216 represents rated values.
Licensing Options
Encrypted RTL free with any Libero license
Documentation
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| BLDC Estimator User Guide | Download |