Position Sensing for Motor Control

Position sensing enables precise control of rotor position and speed in permanent magnet motor drives, which is essential for high-performance control strategies such as field-oriented control. Sensor-based techniques use devices such as encoders, resolvers, or Hall-effect sensors to directly measure rotor position, providing accurate feedback, but increasing the system complexity and cost. Sensorless techniques eliminate these physical sensors by estimating rotor position from electrical measurements such as stator voltage and current, often using observers or back‑EMF-based methods. These approaches reduce hardware requirements and improve reliability in space-constrained environments. Motor Control Blockset™ provides the necessary blocks for both sensor-based and sensorless methods of position sensing.