Design and Implementation of Periodic Speed Controller and Current Estimator for a Fault-Tolerant PMSM Drive System

• Main Author: Ridwan, Muhammad
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/36599
• Institution: Institut Teknologi Bandung

This thesis proposes a periodic speed controller and a sliding-mode current estimator for fault-tolerant permanent magnet synchronous motor drive systems. The fault-tolerant conditions including one power switch open-circuit, one power switch short-circuit, or one Hall-effect current sensor fault. By using the speed-loop periodic controller, the drive system has better performance, including faster transient responses and better load disturbance responses than a speed-loop PI controller drive system. The detailed design of the periodic controller and the fault-tolerant drive system, including fault detection, diagnosis, and control are included. In addition, a sliding mode current estimator is investigated to estimate the stator current. The estimated current is used to replace the measured current when a Hall-effect current sensor is faulty. A 32-bit digital signal processor, type TMS-320F-2802, is used to execute the fault-tolerant algorithm and periodic control algorithm. Experimental results show the measured results can validate the correctness of the theoretical analysis.