Robust Active Fault Tolerant Control for Five-Phase PMSM against Speed Sensor Failures

The speed sensor is one of the most important parts of the five-phase Permanent Magnet Synchronous Motor (PMSM) drive, and the most sensitive sensor to the external or internal perturbation. In this framework, this paper is devoted to the Active Fault Tolerant Control (AFTC) of the five-phase PMSM. Based on a switching system between a real and virtual sensor, which is the Unknown Input Observer (UIO), and between two different control techniques, the system can maintain its high performance and efficiency. The PMSM is mainly controlled by PI regulator, but with the presence of high uncertainty or under a fault condition, the regulation system commute to the sensorless control mode with the Backstepping regulator. Simulated results justify the effectiveness of the proposed AFTC used to drive the five-phase PMSM under different operation condition.