Ricerc@Sapienza

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.

The aim of this work is to present some issues related to fault tolerant electric drives,which are able to overcome different types of faults occurring in the sensors, in thepower converter and in the electrical machine, without compromising the overallfunctionality of the system. These features are of utmost importance in safety-criticalapplications.