A robust sensorless control for PMSM with online parameter identification

The paper deals with a sliding mode based sensorless control for permanent magnet synchronous motors (PMSMs), where an observer using only electrical signals, guarantees the robust asymptotical speed tracking without measuring rotor velocity and position. To compute online the motor parameters and the initial rotor angular position, a set of polynomial equations has been derived from the electrical subsystem. Performances are validated by realistic simulation results.