Speed Sensor Fault Tolerant PMSM Machines: From Position-Sensorless to Sensorless Control

• Published in: IEEE transactions on industry applications 2019-07, Vol.55 (4), p.3946-3954
• Main Authors: Verrelli, Cristiano M., Bifaretti, Stefano, Carfagna, Emilio, Lidozzi, Alessandro, Solero, Luca, Crescimbini, Fabio, Di Benedetto, Marco
• Format: Article
• Language: English
• Subjects: Fault tolerance; Kalman filters; Observer-based control; Observers; permanent magnet synchronous machines; Permanent magnets; Phase locked loops; Position measurement; Position sensing; position-sensorless control; Rotor speed; Rotors; Sensorless control; speed sensor fault tolerance; Stator windings; Stators; Synchronous machines; Tracking control
• ISSN: 0093-9994; 1939-9367
• DOI: 10.1109/TIA.2019.2908337

New sensorless observers (i.e., from stator currents/voltages measurements only), to be included into a simple observer-based sensorless control for the tracking of non-definitely zero speed references in nonsalient-pole surface permanent magnet synchronous machines (PMSMs), are proposed. They are obtained through a "minimum distance" modification from recently presented position-sensorless observers (i.e., from rotor speed and stator currents/voltages measurements only). The rotor speed estimate is here directly provided by the phase locked loop (PLL)-based third-order steady-state linear kalman filter (SSLKF) that has been previously used to mitigate the distortions on the estimated position. Experimental results illustrate the effectiveness of the proposed approach in a speed sensor fault-tolerant scenario.